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My ecm and bcm on my 2002 suburban codes came up it starts up but cut right back off

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  • 133 Answers

Which obd2 scanner you use, The can't be erased?

Posted on Jul 26, 2013

  • tez davis Jul 26, 2013

    I erased them still won't run start for like 3 sec and cuts off

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Posted on Jan 02, 2017

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SOURCE: 2002 Camaro cut off while driving

This was the fuel pump. Checked the fuel rail and no gas. Shook the car and it started, but shut off after a moment.

Posted on Dec 19, 2008

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SOURCE: Harsh shifting then not starting 2001 grand am 3.4L.

Is the security light flashing on the dash... If so , the enabler in your key is worn. This means the ingnition tumbler needs to be changed. E-mail me more details

Posted on Jul 12, 2012

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SOURCE: Does the BCM in a 1996 plymouth voyager control the ECM?

body control module BCM controls body functions like ac,doors,gauges, and the related while the ECM controls engine management systems, and have little inpact on each other chrysler was the first to network these systems together on a high speed hardwired network ecm relays temp data oil pressure alt voltage and mileage maybe a couple other things i cant remember off the top of my head all that goes to the bcm then is sent to the instrument cluster so it is very possible to have the same problem caused by to seperate modules with that being said in less than a year i think they better look closely at the connectors and pins in the wiring i have have multiple problems with the connectors on these models hope this helps

Posted on Dec 05, 2012

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2002 chevy trailblazer and it will not crank or start and the key has gotten stuck in the ignition. I also got a jumpstart and it still didn't start. What is wrong, Please?


Could be a number of thing's , can you do automotive electrical testing ? Do you know if starting is PCM / ECM controlled or BCM controlled ? Do you know what these are ? BCM - body control module , PCM/ECM - engine computer !
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.
Do you know what a park neutral safety switch is ? What do you mean key stuck in ignition ? Can't turn the key to off position , or you can an the key will not come out ?
Your best bet , take it to a qualified repair shop .

Apr 04, 2017 | 2002 Chevrolet TrailBlazer

1 Answer

Cruse control on 2008 Chevy Suburban stopped working. Changed the brake lamp switch (twice). Any suggestions? Where is the fuse located?


This is a computer controlled system (BCM) supply's power to switch .Voltage is supplied to the cruise control switch via the steering wheel control switch reference voltage circuit supplied by the BCM.
The following are the main components of the Cruise Control System:
• The accelerator pedal
• The stop lamp switch
• The body control module (BCM)
• The cruise control switches
• The engine control module (ECM)
• The throttle actuator control (TAC) motor
• The vehicle speed sensor (VSS)

Taking your vehicle to a quailfied repair shop would be your best option . Using a factory scan tool to view input data from switches and sensors is the only way to diagnose the cruise control on your vehicle . Just replacing parts does not cut it .

The body control module (BCM) monitors the signal circuit of the cruise control switches. The BCM relays the cruise control switch status to the engine control module (ECM) via the GMLAN serial data circuit. The ECM uses the status of the cruise control switch to determine when to capture and maintain the vehicle speed. The ECM monitors the vehicle speed signal circuit in order to determine the desired vehicle speed. The ECM uses the throttle actuator control (TAC) motor in order to maintain the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Description .

This is not a fuse problem !!!!!!!!!

You probably don't know what GMLAN serial data is ,do you ? It's GM 's version of C.A.N. How to Diagnose Controller Area Network CAN

Feb 12, 2017 | Cars & Trucks

1 Answer

I have a 2002 bravada and when I was driving I turned radio off and now I have no windows,radio,locks,fuel gauge,oil gauge.checked fueses and they were ok,any suggestions?


Does it start an run ? Your best bet is to take it to a ASE certified repair shop ! All the things not working are controlled by the BCM body control module an are on the class 2 serial data bus , would be best to have hooked up to a factory scan tool to see if there are any DTC'S - diagnostic trouble codes stored . The instrument cluster gauge information comes from the PCM / ECM - engine computer over class 2 data bus .
The instrument panel cluster (IPC) displays the fuel level as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the fuel level percent. The fuel gage defaults to empty if:
The instrument panel cluster (IPC) displays the engine oil pressure as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine oil pressure. The engine oil pressure gage defaults to 0 psi (0 kPa) or below if:
The Body Control Module (BCM) performs multiple body control functions. The BCM can control devices directly connected to its outputs based on input information. The BCM evaluates this information and controls certain body control systems by commanding outputs on or off. The BCM control inputs can be:
?€¢
Sensors and switches that are directly connected to the BCM


?€¢
Class 2 serial data received from other control modules connected to the class 2 serial data link.

The BCM is also capable of controlling other vehicle systems that are not directly wired to the BCM. The BCM does this by sending specific messages on the class 2 serial data link. The control module capable of performing the required function will respond to the BCM message.
You best bet is to take it the dealer or a ASE certified repair shop !

Jan 03, 2016 | Cars & Trucks

1 Answer

Disable vats


The only way to do it, beside bypassing it. Is to have the car running. find the data wire from the BCM to the ECM and cut it. This puts the ECM into default mode, it also set the security light. The car will start and run though. The draw back is. That if the battery goes dead or you disconnect power from the ECM. the ECM will reset and the car won't run. This can only be done on passkey and passkey1. I haven't tried it on passkey2. It will not work on passkey3.

Jan 01, 2015 | 2001 Oldsmobile Alero

2 Answers

How can i find the Location of the BCM on a 2006 Ford Focus?


it needs to have a matching program for the ecm and the immobiliser. A new key cut to the existing barrel/lock and programmed to the vehicle ecm will solve the problem. Even if you get a new barrel and key you will still have to have it reprogrammed to the ecm and immobiliser system

Dec 12, 2014 | 2006 Ford Focus

1 Answer

My 2005 suburban cuts off while driving and cuts right back on


Check the ground wire to the ECM. It may be loose but judging by the age of your truck it is probably corroded. Crimp a new end to the wire and grind down the point where it grounds to bare metal. Cover with undercoating to prevent corrosion.

Mar 17, 2014 | 2005 Chevrolet Suburban

1 Answer

2002 Altima cranks no start. Dealer said that the bcm ecm and immobilizer all need to be replaced. Had to come up witht he money so I had the car towed back to house. Now the dealer is saying that the dash...


Did your Check Engine or Service Engine Soon light come on? If so, did you read the code stored in the ECM? If so, what was (were) the code(s). It's unlikely that the ECM and BCM would both completely fail at the same time. More info please.

Oct 03, 2013 | 2002 Nissan Altima

1 Answer

I have a 2002 envoy LX that starts but quits immediate, the dash says unrecognized driver, what does that mean?


sound like problem with theft security system.ignition key worn out or BCM ECM failing let dealership check it out.if BCM goes bad it will cause ECM to disable the fuel system causing no starting problems.if ignition key worn out or been replaced with wrong type key THE BCM ECM will disable fuel system which is call unrecognized driver in which vechicle in theft security mode.dealership has to check it out.

May 21, 2013 | Cars & Trucks

2 Answers

My 1990 riviera will run great, as you are going down the road it will shut off,but crank right backup. whats wrong?


Check the ECM part number. If it is a 1228253 that is your problem. get a 16198264 the other number does just what your car is doing. I worked at a Buick dealer and know about the problematic 1228253 ecm.

Apr 26, 2011 | 1990 Buick Riviera

1 Answer

2005 chevy suburban- my back-up lights and interior dome lights do not work. All fuses appear intact? Suggestions?


you bcm (body control module is bad) to have the dealer replace it will run you about $400. a quick fix for the reverse light is to splice 2 wires into the wire for the center plug in your trailer wiring. now run a wire up to each reverse light, cut the green wire to each reverse light and **** conect them up. this is a seperate revers feed than the one from the bcm. the dome lights remove the light cover on the second set of interior lights (the one between the drivers seats). the two side bulbs are map lights the center bulb is for the dome lights. run a jumper wire from the right or leftside socket to the center socket. you dome lights will now turn on with just the use of that switch i replaced the back bulbs with led's soo there is no extra amp's being drawn. you could bypass the bcm but i could not find any wiring diagrams for it and i dont know if it can take the added amp's

May 31, 2010 | 2005 Chevrolet Suburban

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