4. 10. Wire length and connection accommodate original floor mount dimmer switch. I. Identifying the cause of the failure will determine a recommended course of action. Dakota Digital says their converter can only multiply * 4, so I'm sending 32,000 ppr to the computer - not enough for it interpret my speed as high enough to shift. Thanks, i retorqued all the ground bolts, no luck. Most 1993+ V6 cars and trucks. Push the tip of your tester into one wire and the tester should light. 541 Cobblestone Road, Aurora, Ohio, 44202 USA (330) 626-9334 info@mrk-motorsports. Found out it is not all that uncommon with 2003-2006 GM trucks and SUVs. The PCM has to be hooked up to a sophisticated simulator that exercises all of the computer’s input and output circuits to make sure it works correctly - which means the PCM has to go back to the supplier, be retested, and if no fault is found, repackaged and put back into stock. 3. to make a ground wire and run it from the metal strip to the engine's ground  Even though most have a computer controlling the output, popular GM and Chrysler Or is it an ECM failure, a wiring problem or a bad alternator? The alternator isn't charging and you've already checked the ground and output circuits. This includes an extra 4 gage battery ground which I ran over to the left side of the trunk. Will go after the PCM/TCM software update. GM cars produced in 2003-2006 use J1850-VPW interface or CAN. com Mon-Fri: 10:00am-6:00pm Sun: Closed AC Delco refurbished PCM for 2001-2002 applications. The fourth terminal supplies an output voltage signal for the PCM. 0L EFI Harness Extra Length will activate your fan relays via ground trigger from the ECM according to the on/off. 17. Red PCM Connector Pinout. This will tie into the wire bundle coming out of the TJ PCM on connector 1 pin A31 or A32. I bought a refurbished PCM online and it fixed my problem and worked fine for approx 6 months. It's getting the triggering signal from the PCM (TEST 6). (see Fig. Use this voltage drop test to verify all sensor grounds including Mass On 1999-2002 ONLY you will also need our A/C update kit, as this will enable the PCM to control the fans PROPERLY with A/C. The Modular engine harness is just a two wire plug. 11. (PCM) Powertrain Control Module (PCM) Output/ Field Service Enable — — Instrument I Cluster 419 C230 PI 10 419 Battery Positive Voltage (B + ) Ignition Positive Voltage PCM Ground 0. Please right click on the image and save the pic. 2000 - 2002 GM LS Truck Engine Wiring Kit Drive By Wire. E. When the 2-3 SS valve is commanded OFF, the PCM senses high voltage. Most cars produced after 2006 are equipped with CAN bus. So I do know that one wire is a good ground. TPS wiring differs between Series 1 and Series 2 engines, make sure you are using the correct instructions for your engine type. Perfect! Thanks! I'm also ordering the triangular three pin for the GM TPS on this Modular engine. Do NOT connect the ground wires to sheet metal or other ground sources. If you have power coming in on the PCM repairs are handled on a case-by-case basis. Each PCM Connector Has 32 Terminals. If there’s a fourth wire, that one sends a firing confirmation signal to the PCM. Turn the center bolt clockwise to slowly tighten the harness and module onto the computer. There is no need to disable all of the DTC’s in some PCM’s just to turn off one DTC. They are completely plug and plays with only 4 wires (switched power, constant power and ground connections This will tie into the wire bundle coming out of the TJ PCM on connector 3 pin C24. Disconnect the Bank 2 HO2S 1. Jan 28, 2017 · The dealer shop told me it was the PCM. All the bad wiring in the world cannot make a module think voltage is one thing and then interpret that voltage to be something else that would make no sense. This magazine is a companion to the GM Edge publication. Plug and play with four wire hookup (switched power, constant power and ground connections required). Jul 20, 2009 · I would almost recommend running another heavy ground wire to both of these wires. 93 volts across the injector wire with the key on, engine off. 00 or 12. I think that in chasing down any "electrical gremlins" that I will be able to mark one more item off the list. Check it. Put one end on the positive battery cable bolt & the other end, JUST TOUCH the connector for the cooling fan motor on the ground side. GROUNDING & CHARGING ACCESSORIES The CK truck ECM will be used in this application. Apr 09, 2009 · • A scan tool can clear the DTC from the PCM history. Additionally, we supply ATO fuse block terminals as well as GM connector pins. This method was carried through 2002 for the Camaro/Firebird only. This is the Diy/walkthrough For Vcm/ecu Ground Wire Update – Chevrolet Forum of a graphic I get via the 2002 Chevy Trailblazer Pcm Location collection. 8 BLK 451 GROUND AND MIL 0. TIP: The ECM can withstand normal current draws that are associated with vehicle General Motors Fuel Gauge Troubleshooting Fuel gauge troubleshooting begins with isolating the problem either to the gauge, sending unit, fuse or wiring. So yes it DOES reset your PCM. I've found that with help of cheap multimeter that I've got after your advise, measured voltage on each GM wire in ACC key position and with engine running, tapped directly into GRAY wire The wire breaks out of the main harness located under the black plastic cover on the passenger side firewall. All 1996+ Vortec trucks. All 1997+ LSx cars and trucks. 00v, and resistance to ground. Is there continuity? YES - Go to step 12. UPDATE: Danny, got that Ford connector today for the knock sensors. all other wires in this circuit are functioning and it has a new neutral safety switch. The electrical systems on the most common GM vehicles apply either 5. 3L, 5. The update kit is automatically added when you choose 1999-2002 as the year of your vehicle. The PCM will supply the (negative) or GROUND signal to turn on fan relays. Update: I decided to replace the full path from the PCM to the crank sensor that was shorted. The ECM throws the code as soon as i turn the ignition switch on. Function 1 -- -- Not Used 2 -- -- 3 WHT 1310 EVAP Canister Vent Solenoid Valve Pin "B" 60 BLK 451 PCM Ground 61 (For 1997 vehicles only: open the small cover on the PCM using a torx bit and remove the knock sensor module and install into the new PCM) Install new PCM including clear and blue connectors. If a terminal happens to be a legacy part already available in the J-38125 Termi-nal Repair Kit, it will be called out in the Service Information . If the PCM is dysfunctional, you may experience various issues with the engine ranging from fuel economy to braking, gear shifts and transmission, among others. 00 volts to terminal L after the engine starts up. com - 6 - www. If it lights up, we know the ground is correct. Another ground to look for is the heavy eyelet that attaches to the dip stick hold down bolt, I think it is part of the same The PCM would send a signal (via ground?) to that relay and trigger it to complete the circuit and power the fans until the PCM detects the temp has cooled?Pretty close. Trying to add in some ground around the engine. 8L, 5. These PCMs are not interchangeable and the wire harness was pinned differently. PCM Has 2 Connectors. Did you find a condition in any of the above areas? -- Go to Step 9. Wiring Harness & PCM Programming Services for the GM Generation III+ Engines. So the IAC I have for the Holley TB is a 4 pin flat, which I'm sure is the adapter you showed me in the initial post. <c> Then we will look at a couple schematics that show you pin connections for each component, and normal GM wiring color codes. small with three wire connectors Gen III Crank sensor. Helpful? Using a Digital Volt Ohm Meter set on DC volts, place the negative meter lead to a known good ground. 6. Indeed, zillions of the GM vehicles that have passed through your shop had a single-wire alternator connector—a lone wire connected to terminal L. The are built with New GM Delphi connector and high temperature wires. I’ll add I’ve had some difficulty in the past with coolant temp sensors, getting the version with the correct number of leads to match my Corolla’s corresponding connector. I now have my large ground wires in place. I don't have a noid light, but I know from prior testing that I have 12 v at injectors, and if I ground the injector ground wires at the ecm plug, I can hear a definite click and if the pump is running a cone of fuel spray. The Power train Control Module is located in the Left Front of the Engine Compartment to the Left of the Fan Shroud. Connects to 20a "Gauge" Fuse through Orange three way connector on Convienence Center. If that is good check for power on the dark green/white wire at the high pressure switch. OFF RPM A mA COM RPM V V mV W W V mA A mA A 14. Connect the alligator clip of your test light to ground. The wiring harness lengths are designed so you can mount the ECM under the dash. Gen IV PCM 2004 and 2005. Trans shop diag it as torque converter clutch. Then I like to run separate GM temp sensors – the GM CLT sensor threads DIRECTLY into the Ford CLT sensor location, and you can remove the Ford CLT sensor entirely (factory computer will know 15. GM is good about catching these problems early so most of your VCM/PCM's out there already come upgraded from the factory. When A/C clutch relay is enabled, battery voltage is supplied to compressor clutch coil. All big 3 done with true 0 gauge wire. How to wire up a 3800 PCM from a 1994-95 C/H/G-body car or U-body Van to run a 3800 Series 2 L67/L36 in your Fiero. This car shifts into overdrive before 40 mph. tapped into our black main ground wire from Vehicle pin 16, Brown with a White stripe is the 5V reference feed to the sensor and should be connected to our orange wire on Vehicle pin 11, and Grey with a White stripe is the signal output from the sensor, which connects to our green wire on Vehicle pin 3. Low voltage or a temporary loss of power or ground to the ECM may cause a DTC to set. Some 2003+ LS PCM's tach signal is not strong enough, and needs boosted, see this link. Once the wire is disconnected, you still use a timing light to set base timing. Tests revealed that the ground connection was faulty. hpt file" you use in the pcm. just 1 sensor located near the starter. Nov 07, 2014 · The most common source of ECM failure is in one of the wiring harnesses. I have been chasing ground wires all week and so far can't find the problem. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. Does anyone know what wire (the tach wire coming out of the pcm) is on a 09 5. find the dark green/white wire in pin13. The problem is pin 27 (black)from ipdm does not ground fan… What I usually do is reground the TPS sensor ground to the chassis, then share the TPS signal (0-5v) wire going to the factory ECU with the MegaSquirt. Then the middle wire shows five volts with the ground wire hooked to the sensor lead, and the other wire going to the battery. SYSTEM WIRING DIAGRAMS 1995 Chevrolet Tahoe 1995 System Wiring Diagrams Chevrolet - Tahoe Ground Distribution Circuit (4 of 4) HEADLIGHTS. • The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM. How to Fix Dependable remanufactured ECM - Electronic Control Modules, ECU - Electronic Control Units, at a fraction of the cost of a new unit. PCM will enable compressor clutch whenever engine is running and A/C has been requested, unless: PCM Bench Harness Wiring Pinouts support@efilive. The light blue wire off the HVAC module should get power when you turn the a/c switch on. PCM the case ground and isolated ground go to the same pin. DTC P0758 is a type A DTC. Jan 05, 2011 · Take a jumper wire and ground the wire at the pcm. Check whether the voltage drops. Mar 08, 2012 · 2007 Newer body style silverado truck. Pin, Wire Color, Circuit No. The two lead connector at the water pump has a black (ground) lead and a PCM +5vdc power lead (probably yellow). Dec 12, 2019 · Since this ground is controlled by a transistor inside the PCM, the voltage should go below . you can get an OBD-II extension cable from Amazon/eBay for cheap and hack GMOS-LAN-01 harness DOES NOT TAP into GRAY wire (thank you for wiring diagram) which provides +12 for ACC key position as well as +12 when engine is turned on. -Each injector wire grounded to the battery has 12. It's getting PCM ground in TEST 5. It's getting power (12 Volts DC) in TEST 3. GM Customer Care and Aftersales . Black Bear Performance offers in-person and mail order computer tuning for your GM car, truck, or SUV with a twist. One is a chassis Ground (which will confirm in this test) and the other is a PCM ground (supplied internally by the PCM). Can the injector cause the ground driver to the PCM to go bad Aug 16, 2016 · If the coil has more than two wires, you’ll need a wiring diagram to determine how to test it. Gen V PCM 2006 to 2008 even smaller, but the most powerfull PCM GM uses. 4's. ACDelco GM Original Equipment and premium aftermarket wire and cable products are the ideal replacement parts for your vehicle. Find out how to access AutoZone's Powertrain Control Module (PCM) Repair Guide for Avalanche, Sierra, Silverado, C&K Series, 1999-2005. I believe that about 2 or 3 feet up the harness these two wires break out of the harness and ground through a 10 mm bolt to the fender. rockp2 wrote: Using the image, are "PCM (-)" and connector "Low Reference "blk"" one in the same? I think that's what they meant to say, but they ended up using the term 'PCM (-)' instead of Low Reference. Install the appropriate battery ground cable nut and tighten to 9 Nm (80 lb in). These weather proof correct fit engine harnesses make the perfect choice for a new boat or to update an old boat. Trigger fans with ECM -- use Pin 42 Connector C1 (ground trigger) and connect corresponding fan "+" to 12V Key  . If not, check the wiring diagram to find where the wire is grounded. second there is issues with the actuator on the throttle body binding up and causing the codes. WIRE HARNESS INSTALLATION INSTRUCTIONS For Installing: #10205 Classic Plus Customizable GM Pickup Chassis Harness – 1973-87 – 27 Circuit Manual #90507 Nov 15, 2011 · GM ECM - Bins - TunerPro Definition Files - Wiring Diagrams - Tuner Info! If this is your first visit, be sure to check out the FAQ by clicking the link above. Check for continuity between body ground and ECM/PCM connector terminal E15. Most GM cars produced in 1996-2003 use J1850-VPW interface. Gen III PCM 2000 to 2003 several part numbers all supercede to one. ground path is provided for the left cooling fan, as well as battery positive voltage to the right cooling fan – thus The pcm is programmed for the difference between auto and 6 speed, so you'll need a program that recognizes that, as well as the final drive gear ratio. • Unhooked and cleaned the body ground wire and frame ground strap the same way. One Red and One Blue. 9L 4. A reading greater than 0. 2, LT GRN, 1867, Crankshaft Position Sensor B+  Powertrain Control Module (PCM) and Theft Deterrent Module (TDM) to communicate without the BCM providing the Connect the black wire to the accessory ground terminal. Harnesses are designed with a sliding grommet seal and 4 - 5 feet of length from the rear of the cylinder head to the PCM mounting position under the vehicle dashboard. I made a spreadsheet showing the pin numbers, wire colors, & what the wire controls. Anyways I was thinking if the PCM has anything to do with the fact that the voltage doesn’t read right or simply the car has a “Check Charging System” on the display and the PCM is bad. They are completely plug and plays with only 4 wires (switched power, constant power and ground connections required). 4002402. did not fix issue but when youre chasing grounds youre  Silverado & Fullsize Pick-ups - VCM/ECU Ground Update for 96 4L60E Help - I After some research I found that the ground wires can cause the transmission  When I checked the ground cable for tightness at the battery I saw looseness at the The negative cable has three total connections and a three wire sensor also If you own a Chevy truck, take a look at this related article about GM ignition  60218: 99 – 06 GM Gen III 4. As the request signal has to make it through both pressure switches before ever getting to the PCM, either switch being open will cause a non-working condition. I believe that it should shift into OD above 45. 4V which told us that the PCM is seeing a good enable signal from the theft deterrent module. com Mon-Fri: 10:00am-6:00pm Sun: Closed Jul 20, 2010 · a2 = system ground a12 = oxygen sensor ground f9 = seria;l data a10 = oxygen sensorsignal a10 = heated oxygen sensor signal e14 = map& egr reference b13 = map signal b4 = map ground f14 = tp reference a15 = tp signal b3 = ect sensor ground b8 = ect signal pcm schematic Hi, I have recently purchased a standalone wiring harness and E37 PCM from Steve Humphrey of Costa Mesa, CA. Identified wires in C2 harness off of PCM and replaced from the PCM down to the sensor. If your problem came back a few days later, there is a problem elsewhere, like a glitch in PCM calibration you have, faulty sensor, faulty wiring harness/connectors/etc, or even some other mechanical issue at hand that is causing the problem. GM TechLink is a monthly magazine for all GM retail technicians and service consultants providing timely information to help increase knowledge about GM products and improve the performance of the service department. 1 volt. 6L 3. The relay then directly activates the clutch. So now I have an OEM Here is a wiring diagram of how the fans are factory wired on the 05-06 GM trucks. Physically tracing the wire from the sensor into the harness should locate the problem. When we "mix and match" it is best to stay Wire length and connection accommodate original floor mount dimmer switch. 8 TAN|WHT 551 Serial Data (UART) PCM Ground 32 03 0. Everything else on the truck is working fine. 3L Connector C1 BLUE. My TSB "jumper wire kit" has the sticker to tag the PCM. For non-Y87 automatics and all manuals there is no correction because GM decided that there is no need for one. 5L 3. BLU: 473: Engine Cooling Fan Relay #2 and 3 Control: 29----Not Used: 30: BRN: 436: AIR Pump Relay Control: 31: PPL : 421: AIR Solenoid Relay Control: 32: TAN/BLK: 422: TCC Solenoid Valve Control Pin "T" 33: BRN: 418 system, their wiring connections, and a possible source or two with part numbers. GM ELECTRONICS TERMINALS. 2L LS3 6L80E standalone wiring harness is designed to let you put the 2008 – 2014 LS3 (6. Most 1995+ 4-cyl cars and trucks GM Ecotec Supported vehicles. Works with PCM service numbers: 16183247. 0L 6. 47v when IGN is on. 16. To obtain the latest electronic controller calibration information for your vehicle, enter the vehicle's 17 character Vehicle Identification Number (VIN) and select 'Get CAL ID'. com PCM Ground Jumper: 25: BRN: 718: ECT Sensor Ground Pin "A" 26: ORG/BLK: 469: MAP Sensor Ground Pin "A" 27----Not Used: 28: DK. These two wires, the parking light and the AC Pressure sensor ground both had a tiny spot abraded where one strand of the wire was visible and when they touched was putting 12v into the sensor ground circuit for the PCM. Conversions & Hybrids - 5. GM Authority is a must-read GM Forum for GM news, GM rumors, GM reviews, and information about General Motors cars and trucks. When I measure voltage at the relay I get 12v on both sides of the coil. distributors. Function 1 BLK/WHT 451 Ground 2 LT GRN 1867 12 Volt Reference 3 PNK/BLK 1746 Fuel Injector 3 Control 4 LT GRN/BLK 1745 Fuel Injector 2 Control 5-10----Not Used Whether you have a totally stock car and need a little pick me up, or want to build all the way to 1,000hp or more, we can help! We are a one stop shop whether you are looking for simple bolt-ons or a serious racing set up. The PCM grounds the relay, you may want to make sure your getting power to the cooling fan If it sees a ground on that circuit, such as when the alternator senses a problem internally, the PCM then sends a serial bus message to the cluster requesting the charging indicator to come on. Jun 15, 2011 · During high speed operation, the PCM also supplies a ground path for the high speed fan relay via the blue. Took it off, cleaned it, no problems since. Re: Electrical issue; BCM problem or loose ground ? Dec 07 2011, 11:50am OK just got truck back from dealership paid 178. Its a 5 pin header that connects to a short cable with RS232 pins on the opposite Jan 23, 2019 · To test the ground wire, power the meter on one lead and check the ground wire with the other. Any help or advice you can provide is appreciated. The ground signal at the injector plug is showing a full, constant ground, rather than a pulsing ground signal like it should be. 6L 5. It's getting chassis Ground in TEST 4. next, check for fuel pump signal at the fuel system control module. If you are adding a number of accessories or ones that draw a large amount of current, you should also replace the battery-to-chassis ground with a larger gauge wire. Use 10 gauge or bigger wire to connect the common ground to your chassis ground. This PI has been updated to add additional Model Years. 3L 6. By cleaning, adding  10 Apr 2018 In this video we go over an important way to route your ground wires if you plan to do the Big 3 or just a simple grounding upgrade on your  11 Jan 2015 like hey dude. Nov 03, 2010 · wiring will be determined by the operating system aka, "tune file, and or ". • Check for PRNDL DTC P0705. and it was. You Since 2011, Ford has made over 60 updates to the PCMs of the 2011 to 2014 F150s across all of the engine types. Three wire. The 6. Run the brown VSS wire to the input of the Dakota box. I installed new PCM, relearned passlock for the key and AC is still broken. 2. You want to take the power wire from your power source, and connect it to Blue 19 and 20, (upper right two pins) and OBD2 port 9 (bottom left). specific calibrated acceptable range, PCM will enable A/C clutch relay. Technician B says that the TP sensor is used by the PCM to determine torque converter engagement and transmission shift points. Replace the cross brace. The only way to diagnose a faulty PCM is to use a special tool, called an on-board diagnostic scan tool, or "OBD" scan tool. The light green wire on the right side is LOW speed from HVAC. All was good. Function: 1: BLK/WHT: 451: Ground: 2: LT GRN: 1867: 12 Volt Reference: 3: PNK/BLK: 1746 Welcome to our GM programming page. This method gives you a single path to the negative side of the vehicle and provides a more effective ground. This why we send our tuners out "blank" so that you can pull the PCM strategy code from your F150 and send it back to us, so we can verify whether or not your truck is up to date on the latest software. Fan Controls 1,2 - GM PCM's typically will control electric fans, usually 2. I just had my transmission rebuilt and I have a soft 1-2 shift sometimes that was there before the work. I check the connector for injector pules, light stays on all the time. I disconnected the fuel rail and turned the key on. Duramaxdiesels. bbbind. 6). Sometimes GM releases a version of software that has errors and will release a new version. If you're having high idle problems, check the intake manifold gaskets for vacuum leaks common problem on TBI 7. • The NP207 & NP231 transfer cases are adaptable to the 4L60-E by using our #4L61 series adapter kits. Do not depress the brake pedal. 23 volts. The most common gauge problems are either a bad ground at the tank, or a sender problem. connect pin32 (rd/wh batt + ) to pin47 (gy fuel pump 12+) this will power the pump to run and check for a faulty fuel pump. We use GM Service Programming System (SPS) for monthly updates. One of the most significant things an installer can do to speed the conversion process along and keep the headaches at bay is to have their factory GM harness simplified and modified. Pin G- N/A, no wire Pin H- N/A, no wire Pin I- N/A, no wire Pin J- White (PCM input); Shows 11. Then the PCM grounds the compressor clutch relay. Jun 12, 2019 · 04 Chevy Silverado 3500 Vortec 6. TPS Ground MAP Sensor Ground WIRE COLOR TERMINATION NOTES; TRANS 1: A: 1 Not available on GM 4L80E, GM 4L60E, GM 4L65E The engine is a 1999 4. This allows the TCM to know when the brakes are being applied. Ive allready posted off, probe each ground circuit at the ECM harness (be careful not to short pins together). GM bulkhead connectors for the engine and front light wiring are included (another American Autowire exclusive) and allow for easy installation with original or custom routing. With years of experience we are also able May 29, 2009 · GM used two methods of receiving a park/neutral signal to the PCM Going back to the 80s with TPI systems, there was a single (ORANGE/BLACK) wire that was grounded to indicate to the ECM that the vehicle was in P/N. Home > GMC PCM ECM ECU TCM TCU Control Module Computer GMC Cars, Trucks & Vans PCM's ECM's ECU's TCM's & TCU's (Gas & Diesel) Duramax Experts! Prices starting at $149 LS1 Standalone Wiring Harness w/4L60E Transmission, DBC Standalone Wire Harness for 1997-2006 LS1 Vortec 4. Apr 10, 2018 · In this video we go over an important way to route your ground wires if you plan to do the Big 3 or just a simple grounding upgrade on your newer GM truck. Vortec V-6 and Gen I Small-Block Vortec V-8 Ignition Coil Output: The only Gen III PCM that General Motors used with the Vortec V-6 and Gen I small-block Vortec V-8 engines is the 2001 2. com P10 In-line 6 Cylinder Controllers Controller IGN SW OBDII V1 V2 Description Blue 8 4 and 5 1 and 2 4 and 8 Ground White 16 4 and 5 1 and 2 4 and 8 Ground Blue 20 16 9 1 12V Unswitched Blue 19 12V Switched Blue 21 12V Switched PCM. This wire may also ground thru the computer. *rolls eyes* Because only the PCM has been changed throughout the years, the 2001-2002 Gen III PCM (GM# 12200411) may be used with any 1996-newer V-8 and V-6 Vortec engine. Jun 18, 2019 · PCM Ground Wire Diagnostics using a “Graduated Eye-Ball, Hands and Fingers: The Mechanic examined the Ground Wire located at the Front Passenger Side Engine Head where there is a “Beefy Nut On A Stud” and was looking for anything obviously LOOSE with the Ground Cable. UPDATE: Hi, There are no breaks in the injector connector driver (ground) wire to the PCM. Connect ELD 3P connector terminal No. est $890. As you measure the voltage between the PCM connector terminals A24 (brown/yellow wire) and E15 (green/red wire), make sure you turn the headlights on high. My question to anyone familiar with this update is do I splice onto the 7 ground wires going to PCM connector, or the wires going away from the PCM? Reading the TSB it appears the new ground harness attaches to 7 pins in the PCM connector and the original wires are abandoned, but no diagram to confirm this. Nov 05, 2012 · If you suspect it is a ground issue, and since you've replaced the knock sensor after you unhook the battery, pull the connector from the ecm. 4L 2. Pre-LML 6. You have to make sure you pass your I was told that there is a TSB for a ground update for the transmission pcm connection ground. This is the most common PCM for use with our 24x conversions. It's 4000 pulses per mile. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Go to Step 6. The GM harness’ bulkhead connector has a brown wire that is a VSS output from the PCM. There is nothing wrong with adding a bonding strap (ground wire) from the engine to frame, try that. Repair Parts There are two sources for wire harness re- Apr 21, 2015 · If you’ve worked on any GM vehicles over the past 20 years, most likely you have encountered one of their security systems. The Splice Pack screws to the fenders and the individual ground wires from the devices in the list above just plug onto the Splice Pack(s). 4L60-E: The new and most refined version of the 700R4 is the 4L60E, and is a great candidate as well, especially when installed with a Gen. The PCM controls everything from air-to-fuel ratio to generating fault or trouble codes for critical vehicle systems. All is well. It's akin to re-booting your PC. Disconnect ECM/PCM connector E (31P). The PCM monitors these driver circuits for proper operation and, in most cases, can set a DTC corresponding to the controlled device if a problem is detected. 8 BLK 451 SliO 3 BLK 451 GliO Power Jun 22, 2013 · Easiest way to check that is plug a test light in at the cooling fan motor. and ask for a Username and Password to gain access to updates to the manual. The first task to accomplish is to get a GM ECM to control the ignition timing. The yellow wire connected up to B2 could be cut and B2 directly grounded that would completely bypass the PCM as the top side of the starter relay is still controlled by the ignition switch. 0L Electronic Throttle, also known as Throttle by Wire or Fly by Wire, engines and to control the 4L60E, 4L65E, 4L80E, 4L85E automatic transmissions. Mar 31, 2018 · Some GM vehicles have two electric switches on the brake pedal. 2L L99 6L80E standalone wiring harness is designed to let you put the L99 (6. The PCM is also designed to control both ignition timing and spark. When using a For over 45 years, PCM® has driven the market by designing and manufacturing engines specifically for inboard watersports. Implementation of this new vehicle emission control monitoring regulation was done in several phases. The ground wire on the PCM is on plug C2 wire 43 (dark green white tracer). They say the PCM ground for the transmission portion has to be improved and it solves the shift problems. Check for a good ground where the wire is grounded. ) or it is affected by voltage overload. Engine wiring includes connectors for H. On most late model cars and trucks, the PCM, ECM, or module MUST be programmed to your vehicle’s VIN code and build code. So my advice is to disconnect that ground of your from the tower strut brace and check the connection between the PCM and the relay. Tan wire with a black tracer. 97-07 LS Powertrain Control Module; E37 Powertrain Control Module; E38 Powertrain Control Module; E55 Powertrain Control Module; E67 Powertrain Control Module; E69 Powertrain Control Module; E54 LB7; E60 LLY (VIN2) E35 LBZ LMM; Trailblazer/Envoy 03-05 PCM; Ford / Mazda; TCM. That’s because the factory ground wire is usually a less-than-adequate 10 or 12 gauge. The ignition coil is fed 2 different grounds. 5 Amp fuse) from the Quick 1 into the main ECU (Engine Control Unit) ignition-switched power wire. 8 TAN/WHT 551 Gill Control PCM Ground 0. • Result of all the above: Vehicle started up quickly. I am in no way a GM mechanic. It is located in the underhood fuse center. 16197428 . Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. Fog Lamp Circuit Jan 27, 2013 · The relay is getting batt power and the bigger purple wire to starter solenoid is good. Save time and money with the right harness. The PCM reads the speed of the vehicle to determine transmission shifting points. I bought the truck used from a Chevy dealership as GM certified (1 year old with 14k). Now my PCM has started throwing a P0204, Injector #4 circuit malfunction code. 3L, and 6. GM has been quite consistent in using the same color codes for wires through the Connects to Chassis Ground through orange three way connector on Convienence Center. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. If you look at the serial data gateway diagram, the left 2 wires highlighted are high speed from ECM. If the voltage drops, then you need to update the PCM or replace it. For Y87 automatics, there is a PCM update from GM that will "correct throttle lag during heavy acceleration". All you do is measure the stock resistance of the ignition with an ohm meter, then dial-in the PassLock bypass module for the same resistance, and last hook up the miscellaneous wires (power, ground, etc. The fuse supplies power, the PCM - engine computer turns the solenoids on by supplying a ground . 0 Engines, EV1 Plug, 3-wire MAF, Drive By Cable Throttle Body $312. Installed new from dealer with no successI assumed it was shorted because i had ground coming out of the power supply but i shouldve noticed the 60 amp fuse was good still. Jan 16, 2014 · Combine that wire with a 12-volt power wire and two-ground wires shown here, and you are business. I hope you never need this routine, but if you do I hope it helps. Our high-quality spark plug wire sets, battery cables, pigtail connectors, lamp sockets, and trailer connectors are all backed by GM. Truck 1999 5. 1 green 18g wire- to heater control valve (feed through unused hole in bulk 21 Jun 2016 I already figured it out, this was a loose PCM ground wire (on the negative battery terminal wire). So is there 2 wires, both a yellow and black wire, in the wiring harness provided for the connector going to the sensor, like in the schematic @Nevada_545 posted above?. 2L) engine in just about any vehicle. I have removed, cleaned, reconnected the frame under battery tray ground, all the firewall grounds, all the battery connections, the fuel pump ground, the truck frame to fuel inlet/bed ground. If your PCM fails your Chevy truck can experience a wide range of problems. The PCM/tune is a 2004. Have added 1 extra optima yellow top that matches my existing starting battery. is a comon issue check this ground wire, its probally broke. efan. The wire from pin 27 of the C1 connector on the PCM does not makes good contact on the PCM connector or on the relay stand (hope that is your problem). For switched power use the pink wire in the GM bulkhead connector. Don’t believe me? Read this scary Technical Service Bulletin from GM: GM PIP4670E Service Bulletin Also to anybody scared of messing with the factory PassLock system, don't be. Pin 24 Ground - This is a black with tan strip wire. 3 to body ground with a jumper wire. I added an alternate PCM connector. I have a 2009 chevy Silverado and just added a 250 amp alt. Most scan tools can read the PCM PIDs for the L terminal status and the percent of duty cycle the PCM sees coming from the F terminal. PCM: Power-train control module (Ford/GM); ECM: Engine control module; Injection control unit (Peugeot, Citroen, Fiat, Alfa, Lancia); DME/DDE  5 Oct 2007 C5 Tech - Bad ground wire in wiring harness on back of head, where does that wire go on pcm? - Heres the problem: 2002 Z06 vette, car has  29 Jun 2011 I even got the pin that needs to be added to the PCM harness. ) Anybody with simple 12V electrical skills can do it. 1 Purple 18g wire - ignition switched 12v AAW has an AC fuse and wire, right under the fan fuse. 7). Inspect for damaged wiring. 8 5. Oct 11, 2017 · Before you submit to replacing the PCM (Powertrain Control Module) as the computer is properly called by Jeep/Chrysler, here is a quick tutorial on how to correct MOST problems that present as a defective unit. But lets say we have a customer who's already purchased an engine and it IS NOT on this list, they will simply need to aquire a harness and PCM from a vehicle that IS on the list to run the engine. Ecm 1 fuse provides power to the coil, icm, and the ckp. 7L GAS with A/T). The Quick 1 MUST be connected to the Main ECU ground, as close to the ECU as possible. TEST 4: Testing The Ground Circuit. Take the frustration out of bad connections. Does this mean that my voltage that should be coming into my sensor is showing a ground, or would this be the return wire going back to tyhe pcm? I'm pretty good with wiring Once the pcm decides the conditions are right, it will ground pin 4 which will close the relay and send power to the starter solenoid. connect pin1 (black ground) to pin16 (pink ground) 2. These are the three primary circuits related to the conditions of a P0687 code being stored. NO - Repair open in the wire between the ECM/PCM (E15) and the ELD. Using a quick dry electrical contact spray cleaner, spray the connector both sides. 0L engines. To wire the OBDII sensor, you’ll need the green wire from the PCM (see diagram) in the upper Trinary Switch Wiring Diagram: Ford or GM PCM with Power Lead for Engine Cooling Fan 30 85 86 87 87a Blue Blue Red Red Red Purple White White Black Ground Battery Auxiliary Blue +12V “Key-On” Ignition Source +12V Battery or Ignition Source PCM Cooling Fan Power Lead Blue Black/Green Dark Blue Black/Green A/C Compressor Clutch Circuit •Trailer Wiring – Class two and three vehicles • Body Builder Connector – exterior lighting and signaling, power, and VSS •A Ground Block located next to the Body Builder Connector for easy ground termination Navigation The Table of Contents and Index items are linked to the actual page. Turn the ignition "on". 01 DC V Figure 5 COMPUTER POWER & GROUND TEST Figure 6 TERMINAL TO WIRE CONTINUITY TEST In order to verify the integrity of the wire end connection at the crimp, carefully place one meter lead into the cavity opening and the other meter The output drivers are electronic switches which complete a ground or voltage circuit when turned on. 99 5% coupon applied at checkout Save 5% with coupon Dec 02, 2014 · The PCM is sending a ground signal to the relay but the relay is not activating. Place the positive meter lead to terminal 18 in the vehicle harness connector end and check for approximately 5 volts on the wire coming from the PCM This is the TFT sensor signal wire. ) • Reassembled everything extra-tight just to be sure. Place the black meter test lead to black connector lead and the red meter test lead to the other connector lead (yellow on my 1995). In addition to power and ground I only wired pin 2 for the serial data since I only work on older GM stuff. I'm going to try wiring it to the PCM and see if it makes a difference. 0L Getting this code p2135 reduced engine power. 1017. Function. 9 to low 15s then after driving it will dropp to low 13s. Reconnect any loose wires if necessary. If your PCM has experienced corrosion, you’ll have to skip to step 5 to see if it’s failed. relay trigger wire (in addition to the low-speed green trigger wire). This includes all wiring that is needed by the computer to run and control the injection system and transmission. Dealer stepped up and diag it as trans. Constant battery voltage is applied on one wire; ground on another. A new PCM fixed the fuel level if your vehicle’s diagnostic port does have pins with access to the target bus, then you can take apart your scan tool and swap wires from the standard pins to the target bus pins. Wire from injector to ecm is therefore good. Install the JET PCM onto the ECM (computer) (see Fig. Refer to Shift Solenoid Valve State and Gear Ratio. 7; 2K; GMracer · updated Oct 16, 2006  Connector Location at Computer GM Truck. The newer and more complex the vehicle, the longer it typically takes to flash the PCM. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm-up cycles without a failure reported. Install PCM back into airbox (or wherever you had it placed) and replace the ducting, filter, and lid. Allison 5-Speed TCM. 5 Nm (40 lb in). For over 45 years, PCM has provided the highest quality, longest-lasting, and top-performing watersports engines available and has become the recognized leader in inboard watersports engines. 4L 4. The Blue connector is referred to as C1 and the Red connector is referred to as C2. (Engine Control Unit) ground wire. If the PCM detects a continuous open, short to ground or short to power in the 2-3 SS valve circuit, then DTC P0758 sets. Below is a list of Ecotec engines that have PCMs that can be calibrated at this time. Why BP Automotive? GM color coded TXL wire to meet or exceed OEM standards 541 Cobblestone Road, Aurora, Ohio, 44202 USA (330) 626-9334 info@mrk-motorsports. this diagram is under engine ,subsystem -fuel controls . Another update: Per my previous post, I have tested all 8 injectors, and they all read the same: an 11 ohm resistance on the 2000 setting of my multimeter. The conditions for starting are usually just a signal from the range sensor that it's in park or neutral. AutoZone's Repair Guides tell you what you need to know to do the job right. 00 to have ignition switch replaced so far so good. These are the test steps: 1. have this car was towed in for overheating. 3 6. GM bulkhead connectors for the engine and front light wiring are included and allow for easy installation with original or custom routing. 5. 12. Mar 21, 2017 · GM LS Engine Swap Wiring You Can Do at Home Reworking a Junkyard GM Engine Harness on the Cheap. Jun 21, 2016 · I already figured it out, this was a loose PCM ground wire (on the negative battery terminal wire). YOU MUST USE A RELAY. Average repair cost is $100 at 160,000 miles. Our collection includes Metri pack electrical connectors in a variety of options, including female, male, 1-way, 3-way, 4-way and 6-way. 6L Duramax Turbo Diesel Trucks – LB7/LLY/LBZ/LMM. 99 $ 312 . Allison 5 Speed Wiring; T42 4-SPEED TCM; T43 The problem presents as every accessory on the truck dropping in voltage. The fastest and easiest way to check the ignition coil's chassis Ground is by doing a simple multimeter voltage test. this. For example, we can disable DTC's individually in EVERY vehicle we support. It is a contact type relay that is activated with a signal wire from the ignition switch. Provides a ground for the TCM. 2L 2. Replaces GM P/N 12200411. Refer to Wiring Repairs in Wiring Systems. If the wires to the transmission or fuel injectors become corroded, they can lose conductivity, leading to a failure. Every vehicle performs differently, and we realize that a standard cookie-cutter tune or handheld programmer won't always work well for everybody. The 1996 Chevrolet C/K 1500 has 1 problems reported for pcm ground issue. PCM connector (RED) C1 Pin Wire Color Circuit No. efilive. #21- the 411 can controll the alternator, but to my knowledge, no one had tried wiring this. Or you have to dig deeper into the anti-thief circuitry to find the missing link. 2 or 200 millivolts or less. Update After the dealership had it for over a week, here are some updates: They blamed the troubles on everything remotly looking aftermarket. As with GM on General Motors 2003 - 2006 4. On these trucks someone at GM had a bright idea to simplify installing the wire-harness at the factory. The PCM power relay is used to apply battery voltage safely to the appropriate PCM circuits. Most PCM controlled components are operated via output drivers. YOU CAN NOT DIRECTLY CONNECT PCM FAN CONTROL WIRE TO FANS. Hooked it all back up, cleared PCM, then tried to start the truck. These definition files cover the fuel system, spark advance, emmissions systems, engine idle control, diagnostics, and vehicle and transmission options. 2L 4. The wire is dark green with a white stripe. 5L V6, auto. 1 White 10g from blower to chassis ground 1 white 18g to chassis ground 1 blue 18g wire- to pressure switch to compressor clutch (feed through unused hole in the bulk head. So to recap:-Each injector wire has 5. Once I replaced, retested everything for correct 5. 9. I ran a switch to the relay and hooked it up to yellow wire at hvac control module; if the switch is on, the ac relay is activated by you turning on fan. If you have cruise control this wire connects to both speedo and the cruise unit. Eliminates replacing entire wire harness. 4. otherwise you may need to actually splice into a wire harness somewhere in the vehicle. If you don’t have a ground at pins #4 or #5, consult a schematic for ground locations. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. (Was going to do the engine ground as well, but it's pretty much impossible to reach it, let alone somehow get a wrench on it. Wiring update. Hello and thank you for any help in advance. Reinstall. Vehicles using these PCMs included the Corvette, Camaro, Firebird, and full-size trucks. Painless Wiring 60103 GM TPI Fuel Injection Harness Fits 90-92 Camaro Corvette Fan #1 Relay Ground ECM Activation, Fan #2 Relay Ground ECM Activation, Fuel Pump Works with PCM service numbers: 16183247. Update. The speedometer output is pin B8 on the pcm. Something to keep in mind though. Install the factory wiring harness onto the JET module. Just makes life simpler because the wire colors may change from X to X but the PCM's pins and connector pinouts do not change The PCM and wiring diagrams I use are for the 0411 or P01 GM PCM that has the Blue and Red PCM connectors. Stesney@GM. 3400 LA1 OBD2 PCM wiring instructions for Fiero swaps using 4T65-E transmissions Pin Wire Color Circuit Description Action Pin Additional Info 1 blk 4T65-E trans fluid temp sensor ground connect to M of the 4T65-E transmission connector 3 orn fuel level output control circuit delete Jul 24, 2019 · Consider Larger Gauge Wire. just leave any generator things off. c2-15 (411) not used. 3V is not acceptable as corrosion has set in or the wiring is faulty. 9L 3. If you don't know how to do this check out this video ECM Inputs and Outputs Diagnosis you will find this wiring diagram at www. third there is a yellow wire coming off the thottle body connector that breaks inside internally and cannot be seen to the naked eye. In other cases, the vehicle may run poorly. Aug 28, 2019 · About us. In addition, check that all ECM power and ground supply circuits do not have an open or high resistance and that there are not any connection or terminal tension issues. The allowable voltage drop is 0. I used chart A-4, it seemed the most appropriate for the issue. HP and Dominator based ECU's can be programmed for TCC control on a 700r4 or 200r4. C3 (Grey -Clear-) PCM 32 Pin Connector; Pin Wire Color Description; 1: Dark Green w/ White stripe: A/C Compressor Clutch Relay Control: 2: Dark Green w/ White stripe: Purge Canister Solenoid: 3---Empty: 4: Black: Engine Coolant Temp (ECT) and Throttle Position Sensor (TPS) Ground: 5---Empty: 6: Red w/ Black stripe: PC Solenoid Valve High: 7 Feb 11, 2018 · A1, A2, B4, B13, B17 ALL to PIN (20) PCM BLUE or ENDS at 12 VDC via OBD2 PIN (16) (Red Wire) A11 to Ground at PCM BLUE PIN (8) B11 to Ground PCM WHITE PIN (16) Switched 12 Volts Direct Current A17,A18,A19,B15 to PCM BLUE PINS (19 & (21) and PCM WHITE PIN (17) ALL end at Center Connector of Rocker (Ignition) Switch A11 to Ground at PCM BLUE PIN (8) Jul 08, 2007 · first off there is a update for the pcm to address those codes, but you will have to take it to the dealer for that. 3 gmc sierra, say the wire for hooking up a window switch for nitrous I have tried some of the local dealerships and the parts dept is clueless. All I had to do was move pin #70 (wht/org) wire to pin #43. Sep 26, 2019 · Should be suitable for most modern GM cars - Buick, Cadillac, Chevrolet, Daewoo GMC, Holden, Opel, Vauxhall. 8. Ltd. Page 1 of 2: 1994 PCM Pin Out Chart (GM 4. If the voltage does not drop, replace the ELD. Oftentimes, this particular part will fail because it is damaged by environmental factors (vibration, corrosion, thermal stress, water damage, etc. Some confusing terminology especially because GM, for whatever reason, has to call their sensor grounds 'Low Reference'. One switch will have four wires and the other switch will have two wires and a vacuum hose. We recommend Torque Pro. Make sure both the PCM and wiring harness get seated all the way down and straight. Problems with the PCM often result in the vehicle not running at all. On the drivers side up front, I have a 4 gage ground wire secured to the frame suspension yoke, then over to the engine block and up to the alternator mounting bracket. It is possible at times that the first few batches of VCM/PCM's may be of older versions. A rich air/fuel mixture, breaks in the coil wire causing arching, cracked coil tower causing arching, low coil output, or low engine compression can cause all of the firing voltage lines to be abnormally low on an oscilloscope display. Oct 13, 2016 · The PCM is responsible for ensuring that the crankshaft and camshaft is positioned correctly so your engine will turn over. Dec 29, 2011 · Powertrain Control Module (PCM) C1 (BLU) Connector Part Information • PCM Connector C1 Assembly 12191489 • TPA (BLU) 12176408 • Connector Cover 12191108 Pin Wire Color Circuit No. 3 wiring harness Wiring diagrams here!!! - Thanks to my man Mark west for hooking this up for me these are fuseblock and PCM and other essential wiring diagrams 623247 623248 Gm-LSX , 02-24-2008 07:31 AM 15 amp each +12v for bank one & two injectors, a few other power & grounds  Edit: btwi just bolted it to the frame so as not to have a ground wire just My PCM FUSE under hood makes REP come on when I wiggle it or pull out when Please update this thread with any new information or opinions. I can probe that wire with ground right at pcm and it will turn over and run. Then you take your ground, connect it to Blue pin 1 (upper left) and pins 4 and 5, (upper middle) on the obd2 connector. Replaced it and reprogrammed PCM/TCM and did a relearn all for free. That injector sprays for 4 seconds each time I turn the key on. They installed something called on the electrical schematics “Splice Pack”. 8/5. Additional information about GM’s wiring repair strategy can be found in the updated bulletin #13-00-89-008A . Make sure that your PCM is connected to your battery, and that there’s no rust on the PCM itself or on the battery wiring. tested and suspected cooling fan module located on fan assembly. The tuning definitions for the '411 PCM are now available. By the time the shop download the update, hooks everything up and waits for the update to complete, you’re looking at one hour of shop time plus the cost of the update. Technician A says that the sensor should show over 100 grams per second on a scan tool display when the accelerator is depressed to WOT on a running engine. Does this mean that my voltage that should be coming into my sensor is showing a ground, or would this be the return wire going back to tyhe pcm? A little more wiring and some photography. Terry A MAF sensor on a General Motors 3800 V-6 is being tested for contamination. The 99-02 LS1 PCM receives a ground on pin 34 of the LS1 BLUE Apr 03, 1998 · The ckp sensor has 3 wires, 3x sensor signal to pcm, ground through pcm, 12v power from ecm 1 fuse. If the GPR kicks in, then the wiring is good, if it does not, then the wire has problems. Passkey, one of GM’s most popular earlier systems, used a pellet in the steel shank of the key with wires routed through the steering column. 16197428 I added an ALDL connector and a toggle switch for the ignition. it requires a 30 watt (average) soldering pencil, some thin 60/40 ROSIN CORE solder (NEVER USE ACID CORE! it will destroy the unit!) and some Deoxit from Radio Shack. Depending on the build date of the vehicle and based on inspection results, dealers are to update the High Voltage (HV) wire harness, clean and apply electrical grease to the Powertrain High Voltage Interlock (PT HVIL) Terminal Shunt, and reprogram the PCM. For sensor ground run the black wire from the GM bulkhead connector to the Dakota box. Pin F- Pink w/ Black stripe (IGN); Shows 12v when IGN is "on". It looks okay, though. Jun 28, 2014 · Now after replacing the plug I got 12v from the “Sensor” wire (good news), while originally read 0v, because the wire was broken within the insulation. The ground readings should be 0. The Dominator EFI has ability to run a GM 4L60E , 4L80E Ford AODE and 4R70W. General Motors Sockets and Connectors - WiringProducts. Damaged PCM mechanisms can cause erratic engine behavior, which is always a good ground to hire PCM inspection and repair services. 18. Spend an evening on the floor with my loom and some 2005 Cobalt and 2004-2006 Ion PCM schematics to check what I have: - The PCM C2 & C3 connectors from the harness are almost fully plug and play with all engine sensors. Engine wiring includes connectors for original points type as well as H. You can add more pins if you want like CAN or GMLAN etc. A coil with three wires has one for power, one for ground and one that carries the command signal from the PCM that operates the coil’s internal switching transistor. Nov 30, 2010 · First thing was a cut wire in the main harness gong into the cab, the damage was caused by the ABS module bracket on the fender well where the cable ran under it next I found the coolant temp sensor on the right side front of mator was broken at the plug then in the wiring harness from the PCM I found an injector wire cut and 4 others sort of Even if the part number on the used PCM, ECM or module is exactly the same, that doesn’t mean it’s programmed properly. You can save this photograph file to your own personal computer. Dec 05, 2013 · Choose a spot on or near the firewall for the common ground point for the harness, and one point for a chassis ground on the negative side of the vehicle. This is done by providing a ground path for A/C clutch relay coil through PCM. Aug 23, 2019 · This isn’t the most common cause of a PCM failure, but it’s the easiest to identify. I just had to make mine work at this point. <<update: attached is an excel spreadsheet that includes HARLEY DAVIDSON info>> I recently needed a pcm for my 01 and could only find an 03 pcm as a replacement. Called for help and then then surfed the web for information on this situation. General Motors original equipment replacement sockets and connectors for GM vehicles such as Chevy, Buick, Pontiac, Oldsmobile, and others. jpg I grounded the ground wire to this bolt on the fender, right below the fuse block. 00. PCM Connector (BLUE) Connector Part Information: Pin: Wire Color: Circuit No. 3/6. - We have complete access to hundreds of parameters within every PCM. We offer custom ECU mapping for most GM vehicles: All 1993+ and up LT1 cars. This type of relay typically uses a five-wire design. The PCM then sends a ground signal to the A/C clutch control relay via C2 pin 43. If you proved out the rest of the wiring correctly then it pretty much has to be icm. The only thing not functioning in the circuit is the pcm ground (Y/BLK) to the starter relay. Note: Uses 14 AWG wire Aug 07, 2013 · Even if the PCM said one voltage was coming from the sender unit and our meter gave us another, only a PCM issue can make PIDs that contradict one another. Install the battery negative cable (1), and tighten fastener to 4. Figure 6 Figure 7 7. My voltage starts out great at around 14. 4002411. Home > Programming > BenchForce™ OBD-II Programming > GM Programming Harnesses > GM Gasoline Engines - ECM GM E67 ECM Programming Harness for 2006-2015 2. 2L 7. 4 Install the ground cable from the battery to the G100 ground stud, then install the modified terminal with di-electric grease to the stud. and flash a 2001 camaro file into the pcm - I would wire the pcm for the 2001 camaro. Publisher & Editor: Mark Stesney GM Service Operations Mark. Last, if you’re doing a lot of scan tool diagnosis, it would pay to invest in a DLC breakout box as shown above with LED indicators that show pin #16 voltage, pins #4 and #5 ground function and bus communications activity. Step 2: Power Splice the power wire (Pin 9 Red with 7. 1, BLK/WHT, 451, PCM Ground. May 21, 2013 · Long story short; still have no clue. When all three relays are energized a. 8, so it has 4-wire case grounded O2's. Jumper the HO2S low (PCM side) signal circuit to a ground. What Does Code U1262 Mean? OBD II fault code is a manufacturer specific code that is defined by car maker Ford as U1262 – “SCP (J1850) Communication Bus Fault”, or sometimes as “SCP (J1850) Communication Bus Fault – Instrument Cluster” and is set when the PCM (Powertrain Control Module) detects a communication failure between itself and HEC (Hybrid Wiring your boat's engine can be simple and easy. Here is an update of something similar to the symptoms I was receiving. 4 Software latest patch I was trying to figure out a comunication issue With the BCM on this truck and went to the trouble shooter looking for info on U0140. The full-size trucks were available with the 4. Jun 09, 2012 · The a/c request signal comes from the HVAC control module then through the high pressure cutout switch(on the compressor) to the PCM. Nov 17, 2018 · For example, GM charges a flat $40 to access all the software/programming for a single VIN number. Anyone know where I can find the ground wire from the PCM to chassis? In 1999, the GM# 16238212 PCM was replaced with the GM# 09354896 PCM. I have the gm troubleshooting and wiring if you Wiring Harness, Classic Update Series, 18 Circuit, Front Mount Fuse Block, Standard Length, GM, Kit ( 8 ) Part Number: AWW-510063 More Detail Sep 29, 2007 · The dark blue wire should have ground comining on it as the engine is turned over, and this is from a signal it receives from the distributor to the pcm. Only have to make some power connections from my fused engine relais supplies. 3L, & 6. Home > GMC PCM ECM ECU TCM TCU Control Module Computer GMC Cars, Trucks & Vans PCM's ECM's ECU's TCM's & TCU's (Gas & Diesel) Duramax Experts! Prices starting at $149 Technician A says that the 3 wires on the TP sensor include a 5-volt reference voltage from PCM, plus the signal wire to PCM, and ground. We supply high-quality OEM automotive wiring connector terminals at the best prices online. Most folks said Throttle body issues, throttle control wiring issues: broken wires in the harness and also the gas pedal assembly due to the throttle by wire set up with dual sensors. Clean or replace circuit and test. 0L, 5. 0L Engines This result, also, indicates that the Coil-On-Plug ignition coil on your GM vehicle is bad and needs to be replaced only if: The coil is not firing spark in TEST 1 and 2. Oct 05, 2019 · My truck's PCM was before the year end fix in 1996 with the corrected PCM from GM as indicated by the numbered sticker. but in the mean time I have my EGR unplugged and tuned out so it doesn't cause any issues. Figure 6: In this example, the block is grounded to the body via a ground cable. com . 11 Apr 2018 In this video we go over the electrical grounds which might cause potential issues in your GM Truck (GMT-800 Platform). The ground terminal is normally grounded to an engine or chassis ground but some systems are provided with a ground via a relay controller. Exact OE terminal and housing replacements for vehicle electronics. III GM engine and PCM (Powertrain Control Module). All V6 cars get a one-piece steel driveshaft to replace the two piece steel unit used in earlier years. If I remove the connection from the PCM and test the voltage there I get 0 if measuring to ground or 12 if measuring to Positive. As far as I am aware the E37 is supposed to be stock with VATS and maybe some other non essential stuff removed via hptuners or equivalent software. If you are using a 12V power you should see 12V on the meter. You may have to register before you can post: click the register link above to proceed. Check the oil pressure sending unit to see The 6. Power and tachometer connectors supplied for GM H. I found a post from another forum that suggests there is a GM TSB 05-06-037 recommending a PCM firmware update (something I initially asked the dealer to look into but was instructed on how to use the cruise control instead) along with the high-resistance from the negative The initial requirements, known as OBD I, required the identification of the likely area of a fault with regard to the fuel metering system, EGR system, emission-related components and the PCM. Depending on the labor rates in your area, that’ll cost between $150 and $200. These can be downloaded by clicking the links that are located to the right. John from Pennsylvania When the 2-3 SS valve is commanded ON, the PCM senses low voltage. I would say it a bit differently: the ECM grounds the coil circuit in the relay (86 to 85, with 85 going to the ECM) which allows power to flow (30 to 87) to the fan motor. Fortunately, these issues can usually be resolved by replacing the corroded wires. eg; I have a pcm from a 2004 silv. Default GM sensor outputs 40 ppr in the 4L60e, so with the same tires/gears, it would output ~105,000 ppm --- this is the range the PCM would be looking for. 2006 to 2008. This is where other harnesses and kits fail. Jan 25, 2019 · GM Flash Updates The flash procedure can takes from a few minutes up to an hour depending on the file size of the software you are installing. gm pcm ground wire update

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