Question about 2003 Saturn ION

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Bcm or pcm connecto

When i plug in my code reader it gives me please connect and try again everything else works except this

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Make sure the key is turned to run but don't start it.......If you already have it turned to run then it has to be a loose connector on the ignition or perhaps the ignition is worn

Posted on Jul 12, 2008

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2 Answers

Safelock on 2006 Pontiac Torrent. Randomly prevents starting. Seems to reset after a day or so. Is there a way to disable


It is the passlock system not safelock An you can't just disable it . It is software program into the BCM - body control module an the PCM - powertrain control module .Simply disconnecting the wires from the ignition to the BCM will render your vehicle useless . If an when the security symbol light is on you need to have it checked for DTC'S - diagnostic trouble codes . A GM dealer ,Chevy , Buick , Cadillac etc.... we know Pontiac is no longer around. Everything will work except the PCM will not let the fuel injectors work .
Passlock?"¢ System
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent system is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key allows the lock cylinder to rotate. The cylinder rotation produces an analog voltage code in the Passlock?"¢ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a serial data message is sent from the BCM to the powertrain control module (PCM). The message enables the fuel injector operation.
The design of the Passlock?"¢ system is to prevent vehicle theft by disabling the engine unless the ignition lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the Passkey system. However, the Passlock?"¢ system eliminates the need for any key mounted components. The components of the Passlock?"¢ system are as follows:
?€¢
The ignition lock cylinder


?€¢
The ignition switch


?€¢
The Passlock?"¢ sensor


?€¢
The BCM


?€¢
The security indicator


?€¢
The PCM

Jun 24, 2016 | 2006 Pontiac Torrent

1 Answer

My 2001chevy blazer security light came on while driving went back off after few minutes now car stalls and then want start up until hours later codes show o2sensor misfires tps and security alarm ???


What type scan tool are you using ? or are you using a code reader ? The SECRUITY -anti-theft system codes are stored in the BCM not the PCM !You need a factory scan tool or a professional grade one to check Body Control Module DTC'S -diagnostic trouble codes !
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the lock cylinder. The cylinder rotation produces an analog voltage code in the Passlock?"¢ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM)/vehicle control module (VCM). The message enables the fuel injectors.

Aug 15, 2015 | Cars & Trucks

2 Answers

Indicators, headlight, high beam, Heater showing strange behavior. Can you please suggest what could be the possible reason for it . BCM or Multi Function switch?


Hooking up an OBD2 reader will tell you right away if the BCM is shot or BCM. Take it to advanced auto or O'Riley's they will hook up a an OBD2 reader and tell you. Sounds like a faculty PCM and BCM to me or just faulty PCM since you've replaced the Body Control Module already.

Feb 20, 2015 | 2008 Hyundai Elantra

1 Answer

U110C lost fuel level message. is this something to do with the pcm


Hi Anonymous, Im glad to help!

The U110C is a BUS Message and usually has to do with both PCM and BCM, because its a lose of BUS Signal between the PCM and the BCM.

FIRST THING TO TRY:
The first thing I would try is remove the negative battery cable for 20 seconds then replace it. NEXT: Start the engine several times then let idle for 10 to 20 minutes then start it several more times and if the code doesn't return and the check engine light stays out, simple drive it for awhile like you normally would. If the code come right back, below is some common problems.

COMMON CAUSES of U110C:
(1) Communication with BCM is lost / See if you can communicate with the BCM.
(2) PCI Bus Circuit open between PCM and BCM / Check the positive and negative bus signal at both the PCM and BCM.
(3) BCM
(4) PCM
(5) Fuel Level Bus Message is missing

Obviously, all these issues must be tested to see which one is causing the problem. BUT first try the battery cable removal and see what happens.

Let me know the out come and I'll try to help further.
Hope this helps and have an awesome day!

Sep 28, 2014 | 2005 Chrysler Pacifica

1 Answer

Po300 multiple random misfire


i can recommend you to RUN the scanner/computer for easy diagnostic and fix it. The electronic vehicle is complicated you have faulty the PCM or BCM.etc.
see the diagram attached.
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Jul 09, 2013 | 1999 GMC Yukon

1 Answer

Gas gauge shows empty after fill up , then works ok after a few miles down the road


You most likely have a bad fuel level sensor in the fuel tank. This is quite common. It can also be verified in most cases by scanning the Body Control Module (BCM) for fault codes. Please note that this will not show up most of the time when scanning with a generic OBD code reader...They cannot access the body control module. Fault codes for this will show up in the Powertrain Control Module (PCM) (accessable to generic OBD code readers) ONLY if it has failed during several trips in succession.

Nov 06, 2011 | 2006 Buick Rainier

1 Answer

Whats code 1351?


hi, this is an obd2 trouble code table, it can help you understand the code.

Basically the engine is either at rest or cranking when the VCM (PCM) is monitoring for the high voltage diagnstic.
The PCM has an internal 5 volt reference that's used for several circuits. This voltage is dropped across a resistor and fed to the corresponding control circuit. The BCM monitors this voltage to determine circuit integrity.
You could have a wiring problem between the PCM (ICU) and BCM, or a problem with the connector(s) at either the PCM or BCM, or the BCM is going bad.
For this problem a wiring diagram is your friend. You can check the connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, or rubbed through wire(s).
Check the PCM to BCM wiring very close.
A good way to find a wiring problem is to clear the code. Monitor the reference voltage while having someone pull on wiring at the BCM/PCM and wiggling the harnesses. If this makes the voltage to go high you know it's a wiring problem. If the voltage remains constant and the code RESETS than the VCM is the problem.

Jul 01, 2011 | 1999 Lexus ES 300

1 Answer

1998 chry town n country it started n stoppd 3-4 times then had nothing took to the chry dealer they said pcm was bad the replaced it everything was ok then but the put on the order advise to replace bcm n...


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Jan 18, 2011 | 2002 Chrysler Town & Country

2 Answers

Engine died, everything else normal. plugged obd2 in and it wont even turn the unit on. is the computer freid?


did you turn the ignition key on when you plugged in the obdII code reader? some of them need to get power from the dlc(diagnostic link connector) to work. it is possible the ecm(pcm) has failed but you could also have a bad ground for it. does the engine crank over? when you said everything else is normal, do all the dash lights and gauges come on before you try to start the engine? by the way the ecm/pcm is covered by federal emissions warranty for 8 years or 80k miles(except california).

Oct 27, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

PCM Troubleshooting Check light on with no code reader power


You can't jump the connector to get codes on OBD II. (Pre 1996) Try hooking back up you code reader. If it doesn't communicate, check the fuse for the cig lighter. This fuse should also power up the diagnostic plug.

Mar 09, 2009 | 1998 Chevrolet Cavalier

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