1- Clean all mounting points for ECM at the engine block. A good way to test grounds is through a voltage drop test. A bad driver in the ECU, but since you said it's a MEFI then 4 out of 8 would still fire, unless you actually killed the ECU. 90 shipping. Slide the newly combined chips into the ECM and seat the Velosyty chip onto the pins in the ECM. so i called my bro. The body ground was not too much better, BTW. I'm trying to figure out if I have a bad ecu. yea learning how to use a multi meter suxs. Just thinking out loud. Bad ICM Bad Pick Up Coil Bad Ignition Coil to ICM cable Bad Ignition Coi. 00 for a brand new computer from Mercedes. Not real familiar with the traction control system, but I know it will cut injector out at times. We had continuity between the grounds on A20 (Main ground on all the ECM's). yes my first post on this forum is a cry for help as i cant find the ecm fuse or fuses on my 97 peterbilt 379 with a 3406e cat. Refer back to the very first plot on this page and you will see that it only took about 100ns to completely turn on. Research the Used 2005 Pontiac Grand Am with our expert reviews and ratings. I have replaced the battery and cable ends and left the battery disconnected for 30 minutes hoping the ECM might reset itself, but that would just be too inexpensive and easy. Grounding to the engine block is usually better than grounding to the frame. The ecm/pcm is a reman. Lamp must glow bright. 210-7, it also requires you to effectively ground the grounding contacts of those receptacles to the branch circuit equipment-grounding conductor. I bought it used off Ebay so it's possible but I wanted to know if anyone else has had this problem. You created the. A VERY common ground fault A very common ground fault occurs in tail lights. Grounding pin W of the diagnostic connector DOES cause the MIL to come on, so I know the bulb is not bad. Without this, the ECU tends to earth/ground elsewhere, causing a specific trace to burn out on the circuit board and killing the ECU. NOTE: Make sure that the wire or cable for each ground has enough length so that when the engine torques (moves under a load) the ground will not be pulled apart. Bad design and risky. A bad oil leak is an instigator; oil will find its way into the ECM and slowly eat up its circuits. when i did the diagnostic check the check engine light came on but didn't blink so thats a code 0 right. Got no signal. All communications through the CAN bus requires a good ground, continuity without shorting, lack of resistance which would cause a drop in voltage and good components. The pump is 4 AMPS running, if it hits about 10 amps the ECU goes quite MAD! The pump can go bad and become this huge noise generator. Bad TPS Ground Voltage Drop testing sensor grounds. I printed out the ground diagram from the book, but I can't read that **** for nothing. As a result, the ECM has become a scapegoat for almost any problem the technician fails to identify. canister grey connector 3 wires is shorted to ground and taking. The ecm/pcm is a reman. The ground bolts were specifically used for the back of the heads. Further (and more exhaustive) testing turned up a bad ground in the ECM harness, which I repaired. The ECU relay is located in the front boot compartment on the left hand side of the car (arrowed):-. Again this wire usually leaves the battery box as a single wire splitting into two at the ECM. Stored in the main memory chip (PROM) is the software (values programmed by GM or your custom tuner) that tell the computer, among other things, how much fuel and spark to deliver to the engine for a given set of operating conditions. The ground reached a full 1. The easiest way to do this is to connect a datalogger or Scanmaster. Is air leaking into air induction system? Repair air leak. 00whats up with that!. Took the vehicle to the a dealer for repair and they found the coils and ECU burned out due to short in the ground wire. Coil Primary - 1. everyone says they come out of the battery box or in that area all i have coming out of my battery box is postive and negative going to starter. We know that as the injector duty cycle increases, the average ground current of the ECU will also increase, and therefore so will the voltage drop between the ECU and the engine. This article will teach you how to replace the ECU, ECS and digital climate control capacitors in a Mitsubishi 3000GT/GTO and Dodge Stealth. This would be logical for burning something. Or in other words, my orignal pcm is fine and I wasted my money by partially "shotgunning" it as bad. Ground Input The EC-60™ controller supports one ground input. An easy example is attempting to draw 10 amps through a bad ground with a resistance of 1 Ohm. When considering an ECM for application in an HVAC system, there are several factors to keep in mind. 1986 - 1987 Ford Mustang 5. The ECM calculates the average speed of the two non-driven wheels, correcting this value for the type of tyre. Needless to say I broke a valve spring, and just built another 5. These are the RED & BLUE PCM connector pinouts that will cover 1999 to 2002 4. Bad ground to ECU help me wire this please Long story short an O2 sensor CEL led me to find out that i have a bad ground on a7 and a15 on the ecu. either way, car completely died today on my way to the mechanic, how ironic. ECMs in HVAC Systems. The schematic shows a relay that connects ground so my initial premise of a bad ground was likely faulty. NOTE: If your existing OBD software or scanner is not returning helpful data, you may want to consider getting advanced OBD2 scanner like TOAD which will dig a lot deeper into your car's performance, health, chip data. com Welcome to DMCTalk. Could this be a bad ecm but Im wondering if its a bad ground, or will the box (ECU) need replaced?. If this were to occur, excessive heat could cause a fire, possibly resulting in severe injury or death. Did check the wire for ECU ground, and does not seem that ECU is grounding the Cam Sensor either. After I got her towed home and started looking at her in more detail (no fuses blown, ECU PCB in good shape, etc) everything seems sane. I am not familiar with the EEC-IV in your car, my 1991 MGM used the EEC-III. At this point you understand the ECU found in the middle of the engine bay. The diagram above shows how simple the installation is. Possible, but highly unlikely. Does cityx suffer the broken ecm like some Uly did? The grounds get dirty, and could get corrosion inside the crimped connector. hello experts! I started a new thread now since i have codes and previous one got buried, So my ABS VSC TRAClights are lit on my 2003 Sequoia abd we retieved the codes : C1223 & C1244. Check spark plugs. Easy to use parts catalog. I have access to an ECM, PCM, BCM and TCM from a 2007 Sierra that I can try swapping over modules to help troubleshoot the problem if they are compatible. Unplug all these devices, to test this theory. In such a scenario, the ECU will sense the drop in engine vacuum first and then using other sensors data will decide if more fuel is required. You gotta remember to unclip it when you leave the car or your battery will die. I would try this before spending a lot of money on a ecu. I'm wondering if this can be caused by a faulty catalytic convertor and bad O2 sensors but would like to rule out the PCM if possible. The end result might be the same -- you can drive your car again, after all -- but engine control modules and units do sometimes go bad, and they aren't really designed to be repaired -- at least, not by the owner or by an average mechanic. PCM power and ground testing. 00 and $4000. I'm wondering if this can be caused by a faulty catalytic convertor and bad O2 sensors but would like to rule out the PCM if possible. Check your Fuses for blown fuses. when i jump this to a ground and pump runs this means the ecu is bad correct? the fuel is about 6 months old i would expect to run ruff but still not running at all. Mercedes Ecm. ECU Women's Physicians. A faulty crank sensor and or cam sensor depending on the system. OK, in a nutshell. I should have VERY good grounds haha. ---- I will look into the power sources for these items. After both agreed, I settled in to plan the project. Your car's Engine Control Module (ECM) monitors all the sensors in the vehicle to make sure that the car's systems are running as they're supposed to. Since it is a dedicated ground, it passes through the computer on its way to the computer main power ground that terminates at the battery pigtail ground. The relay would have to be closed to get the zero ohms I was looking for there. How to check for a bad ECM/PCM HELP!!! Thanks so much for your post. Grounding to the engine block is usually better than grounding to the frame. 670V (green wire XJRS) That leaves the only other direct to ECM possible communication wire #6 (5V input also but unshielded) left with nothing talking to it. The symptoms might start out being minor, but they could progressively get worse if you don’t do anything about the ground wire. A ground is a ground, I thought you were talking about how you put a positive wire from the alternator to the ground. Discussion in 'Repairs, Bad TPS would not, in my opinion, make any difference to the O2. This internal ecm ground is turned on/off by the ecm,but its not. Suzuki's have a weak wire gauge feeding the ECU and the shorted fuel pump, likes to make the ECU reset over and over, click ,click ,click. Service bulletin suggests cleaning engine and body harness ground connection to repair the problem. I am working on 2005 srx Cadillac with a 3. check_box_outline_blank. The easiest way to do this is to connect a datalogger or Scanmaster. The resistance should measure less than or equal to 1. Stored in the main memory chip (PROM) is the software (values programmed by GM or your custom tuner) that tell the computer, among other things, how much fuel and spark to deliver to the engine for a given set of operating conditions. The large ground straps to the engine being bad would cause the engine to die when this happens. The injectors (3, 4, 5, 6, 8, 10, 12, or 16 of them) are operated by individual transistors inside the ECU that control the ground side. It is similar to repairing the computer or smartphone you're using to read this article. Before ordering another ECU make sure you have +12v on ECU pin 20 when key is on and pin 46 all the time or ECU will never power-up. ok, so here's the full scoop, my 95 gsr started sputtering and having ridiculous, erratic tach movements, losing power, etc. This is only my assumption but I may be wrong---> If you were losing ground to the trans control module I would also have to assume you would lose your ground to the engine control module. In such a scenario, the ECU will sense the drop in engine vacuum first and then using other sensors data will decide if more fuel is required. If your reference voltage is too high, you have a bad ground or a bad ECM. The ECU operates at a nominal supply voltage of 12 or 24 volts, depending on the model of the ECU. Step A says to replace ECM. You will have hard starting, low power and drivability problems. The injectors (3, 4, 5, 6, 8, 10, 12, or 16 of them) are operated by individual transistors inside the ECU that control the ground side. yes my first post on this forum is a cry for help as i cant find the ecm fuse or fuses on my 97 peterbilt 379 with a 3406e cat. 1uf really killed the loop. But overall, it's not practicle to drive. framingjohndeloreanfilm. ECU needs to have a successful attack on the ground against FBS opponents. We’ll be dissecting each plug and it’s functions and wire values as well as wiring color diagram as well. The ECM operates the ground circuit to control the valve, which opens the purge valve at specific time intervals, allowing gas to get into the engine. If the ECU relay is suspect, then it should be removed and either repaired or replaced. Missing at idle is usually ignition and the culprits are the spark plugs, wires and coils. Welcome to adidas Shop for adidas shoes, clothing and view new collections for adidas Originals, running, football, training and much more. The tan wire (ecm ground) is connected to the O2 sensor low wire for the 1227727/730 speed density engines. First off, don't confuse replacing an ECM with repairing one. 0 ECU Diagram Pin # Name Signal Type 7 Engine Coolant Temperature Sensor Analog 25 Intake Air Temperature Sensor Analog 29 Primary O2 Sensor Analog 40 Power Ground Ground 43 Secondary O2 Sensor Analog 45 MAP Sensor Analog 47 Throttle Position Sensor Analog. Thanks, that is helpful, the orginal ecu had 20,000 miles on it, the 1st one replaced by gm worked fine for about 200 miles, and yet to see about the 3rd, you make a good point on the possibilities of bad ecu out of the box, anything is possible, one good thing, the same tech has worked on the car, so its not been around the garage, if it. I agree that the Crank Sensor could be a problem, But, the fuel pump needs to prime first and you should be getting Data on the DLC, even if the crank sensor is bad. 5 - 2004 Toyota Tacoma Trucks Authorʼs Note: The data in this guide was assembled directly from the engine and electronic transmission control sections of the Toyota Factory Service Manual (FSM) Wiring Guides for each 4x4 and PreRunner Tacoma model sold in the US between 1995. •Split the bad section you found in step 2 in half and repeat the same tests. I'm leaning towards the ECU, but want to be sure before I have it replaced. Is there anything I should be looking for? Relay or inline fuse or something?. Lucky I only put it in for a few cranks, so I am going to send it back. Baseball Baseball: Facebook Baseball: Twitter Baseball: Instagram Baseball: Tickets Baseball: Schedule Baseball: Roster Baseball: News Basketball Basketball: Facebook Basketball: Twitter Basketball: Instagram Basketball: Schedule Basketball: Roster Basketball: News Cross Country Cross Country: Facebook Cross Country: Twitter Cross Country: Instagram Cross. Looks like I've gotta shoot for continuity from the A/C relay, contact #2 (F10 on the connector) thru the A/C comp clutch to ground. Also, assuming that an ECU is faulty because of no CAN communications, where the CAN gateway may be faulty or another ECU may "hang" the CAN bus, can be misleading. spark passes from the center electrode to the ground electrode and in the other plug the discharge is in the opposite direction, i. I checked both ECC grounds and they were at 0v ref to battery with out the ecm plugged in. I have already replaced the ECM. In the table of bus messages, you can see that the ECM sends the value for vehicle speed and that the majority of other control modules use this. I do have a scope, but. Get your Chrysler PT Cruiser engine control module (ECM/ECU/ECC), transmission control module (TCM/TCU/TCC), or powertrain control module (PCM/PCU) computer from Imperial Car Computer Exchange. Check for a good ground where the wire is grounded. have spark and 40lbs. , causing the ECM to intermittently go bad, they may not find it. If, however, the ground is at 17mV, then the ECU sees 4. We went through to try and verify all the grounds to the ECM's. If you disconnect the battery and the car conks out, you don't know if it conked out due to insufficient alternator current, or whether the resulting transients caused your ECU (the car's computer, which controls fuel mixture, timing, and much more) to spit out bad data, shutting down the car. Not that bad ECM's are uncommon in this carline but this ECM had been given the famous "tap test," by yours truly, often over the past three weeks. The check engine light came on, and I took it to the dealer to get the diagnostics on it, and they said it was a bad ECM ground, and that it needed to be cleaned off, would take about an hour and 250. Slide the newly combined chips into the ECM and seat the Velosyty chip onto the pins in the ECM. I'm trying to figure out if I have a bad ecu. The truck will run fine for a day, the the CEL comes on and it goes in Derate. My fuel Pump and ECU have both been suggested. I went ahead and attached the ground to the upper starter bolt. Fill out the Repair and Return Form and send us your unit today. I've swapped relays with known good ones it's definitely not the relay. prob cheaper if you look real hard. If there isn’t a diagram under there, there is one in a Helms, Chiltons, or Haynes manual for your car (you should have one of these anyway). " ECU actually outgained Houston last week 415 to 405 on 23 more offensive plays than the Cougars but Houston got the better of it on the scoreboard with a pair of ECU interceptions and a turnover on a fumble not helping the cause. Generally, it is located in the fuse box under the dashboard. Find out what you can expect to pay for ECU repair, the 5 symptoms of a faulty ECU, and the technology of ECU diagnostics. DME ECU ground signal missing Continuity test performed from wire 85 relay to pin connector 27 of DME is good. coil compared to battery ground and 0v compared to coil ground. All communications through the CAN bus requires a good ground, continuity without shorting, lack of resistance which would cause a drop in voltage and good components. I am thinking that it is good since none of my symptoms changed when I swapped to the remanned from the old. Got no signal. Fault codes Chart. Grounding pin W of the diagnostic connector DOES cause the MIL to come on, so I know the bulb is not bad. Start with the VR ground since you had a bad ECU ground. MyMopar is the best Mopar forums and site on the web. I suggest you set your meter for the diode test position to make the measurement. On 1996-99 vehicles, terminal 2 (ground) is brown/green, and terminal 4 (signal) is red/yellow. What is causing this. The ground is a major part of the battery's charging system, so assuming that you're getting proper voltage output from the alternator wire, and the battery isn't hashed, then you may be looking at a bad ground wire. I put the multimeter on the ground wire and determined that i dont currently have a short. Lucky I only put it in for a few cranks, so I am going to send it back. i have the s1 maf so i should be having 2 ground a power and a signal. Check spark plugs. Haven't checked the wiring yet, but anyone seen this, or could the ecu be bad?. It is the central control unit of most vehicles and controls a variety of functions, such as electrical system power distribution, emissions, ignition, and fuel systems. Polaris has determined the recall defect could cause the ECM to fail and overheat. - Subsituted ECU for a known good ECU - Replaced my hacked CX engine harness with a DX harness - Checked for voltage at fuel pump (no voltage) - Jumped the fuel pump connector at the main relay (fuel pump kicks on but ECU still not getting power) - Checked for battery voltage at A25 ECU pin (no voltage). Refer back to the very first plot on this page and you will see that it only took about 100ns to completely turn on. I found a link on the internet with a simple analog Voltmeter test that can be performed at home on Chrysler products, but I'm not getting ANY of the results they specify to tell whether the ECM is good or bad. 3, in original article). Referring to an EWD, you will notice that the throttle position sensor, water and air temperature sensors, and air flow meter all flow current to ground through circuit E2. MyMopar is the best Mopar forums and site on the web. It stalls quite often, sometimes not wanting to start up. Transmission Instruments specializes in the ground-up rebuild and refurbishment of these devices. 3 Sam cam same cr I used the same old tune and cleaned it up for some new things added on ran fine. Repair the fault. This maintenance is particularly useful if your stock capacitors have started to leak, which can be considered a fairly common occurrence for our cars as the years pass by. It works by using 2 probes to send a current through the circuit and measuring how much resistance, in ohms, that. Not that bad ECM's are uncommon in this carline but this ECM had been given the famous "tap test," by yours truly, often over the past three weeks. The weird part is that it does not do this everytime I drive it. cause a spike in your ECM and cause it to short out. However, purchasing a new engine control unit is expensive. The injectors (3, 4, 5, 6, 8, 10, 12, or 16 of them) are operated by individual transistors inside the ECU that control the ground side. Common Volkswagen ECU faults looking at the different models and possible ECU problems for them. For a MEMORY code, it WAS out of range at one time (possible intermittent wire etc. 983V, not 5 (5v - 17mV). No other content has been changed. - Check for continuity to ground on the ground side. With a test lead ground X3 pin 23 (pin 46 for CEC modules) and retest for engine crank. These are the RED & BLUE PCM connector pinouts that will cover 1999 to 2002 4. Establish a good ECM case ground by measuring the resistance across two points on the ECM. Most fuse boxes are 2 piece, screwed together, and they open to access the main bus. Top 5 Symptoms of a Bad Negative Battery Cable. when i did the diagnostic check the check engine light came on but didn't blink so thats a code 0 right. plug and play ECU that fits 1985-1990 applications, including 22RTE. and lastly the NEG to NEG ground of the. Wiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM 96 Engine control module (ECM) – ignition supply voltage low. 2- Install the three mounting bolts while ECM is positioned in place. Dedicated to all things from Mopar, Chrysler, Dodge, Plymouth, and Desoto. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. The ignition input is applied by the ignition switch through a 5 amp fuse. Choose from 441 listings to find the best priced Caterpillar Engine Control Modules (ECM) by owners & dealers near you. 88 Likes, 6 Comments - Daniel Lux (@lux. We are not good enough to win games like this yet Have allowed 240 yards on the ground so far. Last but not least, check for continuity from pin #2 on the DLC, to C4-#11 of the ECM, harness side, this is the serial data wire from the DLC to the ECM. yes my first post on this forum is a cry for help as i cant find the ecm fuse or fuses on my 97 peterbilt 379 with a 3406e cat. ---- I will look into the power sources for these items. I'm trying to figure out if I have a bad ecu. Repair the fault. If you have voltage on the power wire to #5, key on, then we know either the ground wire is bad (broken or open) to the ecm -or the internal ground for that injector is out, inside. Without this, the ECU tends to earth/ground elsewhere, causing a specific trace to burn out on the circuit board and killing the ECU. When i tap into that wire and ground to the body the CEL goes away but gives me a very odd hesitation that causes the car to die in lower RPMs. The ground reached a full 1. The 1G ECU, however, can blown the track at a couple different spots. (Also look for damage from varmints, who love to munch on wiring looms. A mechanical problem that a technician fails to recognize (or recognizes but fails to fix properly) is often blamed on the ECM. The part number for my ECM is 89661-33740. Also probably want to swap the A/C relay and the blower motor relay for testing. Tested good, no short. 1995-99 MAXIMA EGI HARNESS WIRE BREAKAGE DIAGNOSIS AND REPAIR PROCEDURE APPLIED VEHICLES: 1995-99 Maxima (A32) This amended version of NTB98-008a updates the Applied Vehicle date range and corrects and adds information to the DTC Charts. Some are permanent and require no maintenance. 0v, checked with pressure/vac and the signal from the sensor goes to about 2. How to reset your ECU in the advent of a CEL ("Check Engine Light") To reset the ECU; remove the 15A fuse for 1 second. Otherwise, see the web site or the "troubleshooting electronic feedback carburetors" section. If the PCM is damaged, especially by water, assume that it will need to be replaced. Note: Do not paint back of ECM as this will result in the poor ground. : 0261200403. Even the initial premise was wrong. Are yours all still back there? Did you re locate or use a caspers ground kit n any those? Also thinking about the circuit that feed the ecm. I found a link on the internet with a simple analog Voltmeter test that can be performed at home on Chrysler products, but I'm not getting ANY of the results they specify to tell whether the ECM is good or bad. “Power up B1 Blue and ground B2 Red. A 12 V input is always supplied to the primary coil, but the circuit is incomplete until the 5 V signal causes the power transistor to connect ground. i did do a test jumper i saw this response in another thread. EDIT: Problem was fixed, it was the ground cable. The Applied Vehicles, IF YOU CONFIRM and Claims Information sections have been changed. Common Volkswagen ECU faults looking at the different models and possible ECU problems for them. And that the fix is to add another ground to the ECU. I have found if I ground out the signal wire at ECM the pump kicks on. Your harness MAY NOT have a pin in a location I have listed having a wire. With the engine running wiggle and tug at the wires from the Ignition Coil to the ICM and also the other connector on the coil. You also have two seperate ground wires on pins 65 and 67. Not real familiar with the traction control system, but I know it will cut injector out at times. I'm told that it's most likely a bad ground or short somewhere, as the car still runs fine. The senior was 9-for-14 for 125 yards and added 48 yards on the ground, including the game’s only touchdown. WARNING Use caution when identifying the coolant temperature sensor leads, as the signal for the ECM (terminal 3) is brown/green on 1993-95 vehicles and can easily be confused with terminal 2 on 1996-99 vehicles, which is also brown/green. With K-Series engines, especially with engine swaps or situations where the intake manifold has been removed, it is important to ensure there is a good ground connection between the ECU and the cylinder head / engine block. We had continuity between the grounds on A20 (Main ground on all the ECM's). The part number for my ECM is 89661-33740. It is a 4 wire and the outer two wires test the same as #1. The ECM sends this value for vehicle speed over the bus making it available to other systems. If it drops to 0v you know that the scan data is good but not much else. If the fuel pump relay isnt bad,do an ohms test on pin 22 wire. auspices I was working that summer, and Dr. High charge rates are bad as well for the ECU. exact same issue, I traced it to the ecu, my mechanic traced it to the ecu, I dropped the bike off at the dealer about a week ago to do the recall and hoping they will find and fix the problem they traced it to the ecu, I called [email protected] to see if a bad flash would cause this issue, but I was told that the problem would have presented. Get your Chrysler PT Cruiser engine control module (ECM/ECU/ECC), transmission control module (TCM/TCU/TCC), or powertrain control module (PCM/PCU) computer from Imperial Car Computer Exchange. The ECU supplies a chassis ground through the E1 circuit which typically terminates somewhere on the engine. I really need to replace my battery ground cable one of these days. So V=10(1) thus making the voltage drop a whopping 10V. If the engine does not crank wiring must be repaired between X3 pin 23 (pin 46 for CEC modules) on the engine ECM to pin 85 at the crank relay. This would be logical for burning something. - Per the FSM, I have followed the flow chart to test the MIL. Top 5 Symptoms of a Bad Negative Battery Cable. For a MEMORY code, it WAS out of range at one time (possible intermittent wire etc. The ECU is usually diagnosed by a process of elimination. the ecm relay may allow silicon vapor to form and, over time, the silicon evaporates from the diode molding which causes silicon oxide to develop on the ecm relay contact due to arcing. And try to cleanup that ground connection flat box on the firewall - it's one of the ECU's main grounds and could be a problem. If any one shows continuity to ground, there is a short. This wire may also ground thru the computer. auspices I was working that summer, and Dr. A mechanical problem that a technician fails to recognize (or recognizes but fails to fix properly) is often blamed on the ECM. 00 for a brand new computer from Mercedes. A bad ECM may lead to a vehicle that won’t or is difficult to start. The PCM can't operate properly if it does not have a good source of power and a good ground. Pull down the ECM and verify the same result at the module. Almost seems like there has to be a loose connection somewhere. Grounding issues. Dealers and repair shops deal with these problems by what we call the shotgun approach (fixing something by replacing many things or one big thing). Have battery power to Cam Sensor. Unplug the ECM / PCM connector and get a pinout schema of the ECM connector. Does anyone have a flow chart for this? Suspect bad ECM but that is a little more then I would like to through at it on a whim?. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Alarm horn, engine compartment wiring harness ground 1 (coil packs, after-run coolant pump (VR6 only), vehicle speed sensor (manual transmission only)), engine compartment wiring harness ground 2 (engine control module, brake system vacuum pump (automatic transmission only)), automatic transmission wiring harness (transmission control module. The diagram above shows how simple the installation is. If this ground is poor, then all manner of weirdness can result including the infamous 3800 RPM hesitation. Hooked up a Modis and checked for signal from Cam Sensor to ECU. Unplug the injector connectors and PCM connectors 1 & 2 (1 is black, 2 is clear). 4 ECU ECU Fuel Pump Control Circuit Repair Repairing Your Own LH 2. Only the FL-XiED, current ViED and AFXiED have the ground wire for these bikes. You should find a fuse in the battery box for this power source. You should check all 4 anyway. Your car's Engine Control Module (ECM) monitors all the sensors in the vehicle to make sure that the car's systems are running as they're supposed to. After jumpering a wire from the the speedometer assembly acorn nut directly to the battery ground all of the issues disappeared. has a service code po203 Injector circuit fault. framingjohndeloreanfilm. The O2 circuit is then grounded through the inside of the ECM electronic board by this ground wire. Learn about this problem, why it occurs, and how to fix it. Bad ICM Bad Pick Up Coil Bad Ignition Coil to ICM cable Bad Ignition Coi. And yes, everything in that circuit (Starter motor, starter selonoid, battery, and ground wires) are all connected properly. but if ya don't know how and what to check. ) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!. Only the FL-XiED, current ViED and AFXiED have the ground wire for these bikes. exact same issue, I traced it to the ecu, my mechanic traced it to the ecu, I dropped the bike off at the dealer about a week ago to do the recall and hoping they will find and fix the problem they traced it to the ecu, I called [email protected] to see if a bad flash would cause this issue, but I was told that the problem would have presented. I will check the ground points on your car, loss ground or rust. Common areas that cause failures are: poor grounds and powers, bad wiring, shorted solenoids/relays, or misdiagnosis by the installer. NOTE: Make sure that the wire or cable for each ground has enough length so that when the engine torques (moves under a load) the ground will not be pulled apart. Stairway Alcove Ground Floor. We can save you the time and money by testing your ECU DME before spending on costly diagnostic labor and sensors. I have found a replacement second-hand ECU for sale locally but the label is red and the number is 0261200413- also from an automatic 525i saloon - probably built in '92. Response time is six time worse here. Vito 110 CDi 2. Dealers and repair shops deal with these problems by what we call the shotgun approach (fixing something by replacing many things or one big thing). If bad, repair loom. ECU needs to have a successful attack on the ground against FBS opponents. bad thermostat ground means no ecu power. With a test lead ground X3 pin 23 (pin 46 for CEC modules) and retest for engine crank. ECU football prepares for AAC opener at Navy this Saturday We went out and practiced on Sunday and said it's not bad. Is it possible to ground somewhere else or is it necessary to run ground all the way back to ecm. Stairway Alcove Ground Floor. A/C clutch will not engage. The engine may still crank, but it will not be able to start without the vital inputs from the computer. A faulty crank sensor and or cam sensor depending on the system. Took out the ECU and opened it up but found no signs of it being shorted or anything open. Learn about this problem, why it occurs, and how to fix it. It is similar to repairing the computer or smartphone you're using to read this article.