NEED HELP ASAP car wount start
Thread Starter
Instructor
Joined: Jul 2006
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From: TAMPA FLORIDA
NEED HELP ASAP car wount start
well last night i was driving i just had filled up but the gas netlee didnt go up yet so i do what i always do on my truck i drive it then turn it and back on realy quick so i did after it on the vette while i was driving after i turn it off them tried to turn it back on it wouldnt start again i am getting reduced engine power some traction control codes and abs codes anyone have an idea what could have happen .....please help me out my car is on the side on the road broken down ....thats embarasing for a corvette to be like that......
Team Owner
Joined: Jul 2004
Posts: 24,652
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From: NJ
St. Jude Donor '05-'08
did you check the battery? Many people have complained that they just go dead or get really weak and cause whacky readouts.
Edit - looks like it is running but on reduced power.
Do you know the codes that you are getting???
Edit - looks like it is running but on reduced power.
Do you know the codes that you are getting???
Thread Starter
Instructor
Joined: Jul 2006
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From: TAMPA FLORIDA
here are the codes i tried disconnecting the battery but no help it still bring up the same codes
PCM CODES
P0601 PCM Memory
P1518 PCM to TAC Module Serial Data Circuit
TCS CODES
C1276 Delivered Torque Signal CKT Malfunction
RDCM CODES
U1064 Loss of Communications with BCM
i got all these codes after this happen ..i i didnt have any problems or codes before this happened
PCM CODES
P0601 PCM Memory
P1518 PCM to TAC Module Serial Data Circuit
TCS CODES
C1276 Delivered Torque Signal CKT Malfunction
RDCM CODES
U1064 Loss of Communications with BCM
i got all these codes after this happen ..i i didnt have any problems or codes before this happened
Team Owner
Joined: Jul 2004
Posts: 24,652
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From: NJ
St. Jude Donor '05-'08
Based on what I read I would first change the battery or at least hook up a jump and see if that takes care of it.
here is more:
C1276 says if P1518 is present then go look at that error.
P1518 says it is the communication between the trottle actuator control and the powertrain control module.
this could be set off because of low voltage from the battery.
it could also be a blown fuse that was setoff by a short.
read this and it may help you locate the problem
http://www.gearchatter.com/viewtopic10423.php
here is more:
C1276 says if P1518 is present then go look at that error.
P1518 says it is the communication between the trottle actuator control and the powertrain control module.
this could be set off because of low voltage from the battery.
it could also be a blown fuse that was setoff by a short.
read this and it may help you locate the problem
http://www.gearchatter.com/viewtopic10423.php
Safety Car
Joined: Aug 2000
Posts: 4,933
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From: San Rafael CA
Originally Posted by 98LS1CORVETTE
i drive it then turn it and back on realy quick so i did after it on the vette while i was driving after i turn it off them tried to turn it back on it wouldnt start again......
If so, the EBCM may have been confused by that. Wouldn't account for the car not starting, but might explain the TC/AH codes.
When you try to start it, what happens ... does the starter "click" and not turn the engine over, or does it turn over the engine ?? What voltage is the DIC and/or gauge displaying for the battery?
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Safety Car
Joined: Aug 2000
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From: San Rafael CA
Originally Posted by 98LS1CORVETTE
yes the car was rolling when i tried to start it i put in neutral and it just turns over no start
PCM CODES
P0601 PCM Memory
P1518 PCM to TAC Module Serial Data Circuit
My 2001 Service Manual says the P1518 is when the PCM cannot communicate with the Throttle Actuator Control. This should set a CHECK ENGINE light and also give you REDUCED ENGINE POWER.
The P0601 is more serious. The PCM failed an internal test of the microproccesor.
All codes should be followed by either a "C" or an "H" - Current or History. I'd clear the codes and try starting the car. If it won't start, check and see if rhese same codes are set. If you get the P0601 the car will need to be towed to a dealer for the PCM to be checked and possibly reprogrammed or replaced. If the P1518 reappears check wiring to the Throttle unit, but that probably is also gonna require a tow.
Good luck, hopefully these were "H" codes and the car will start.
Safety Car
Joined: Aug 2000
Posts: 4,933
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From: San Rafael CA
Originally Posted by 95BlueBomber
I would try disconnecting the battery for a minute and trying it again. I always try that before jumping to conclusions.
Thread Starter
Instructor
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From: TAMPA FLORIDA
i dont think its a wiring problem its either the PCM or the BCM or the TAC .....i getting it towed to my house right now i am gonna look at it with more time when i get home from work.....i also checked all the fuses and all are good plu i got good battery voltage
Safety Car
Joined: Aug 2000
Posts: 4,933
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From: San Rafael CA
Originally Posted by 98LS1CORVETTE
anyone else know what could have happened ........all cause i turn the car off and back on while i was driving
The two I'd look into are the PCM and TAC codes. I'd ignore the BCM as none of those codes are posted by the BCM. Any DTC starting with a P comes from the PCM. BCM codes usually start with a B (for Body).
Be sure you've cleared the codes, cycle the PCM diagnostics until you get a clear run that says "NO CODES", then try starting. If you continue to get rhe P0601 I can only tell you what the 2001 Service Manual I have shows.
It says if you have a P0601 and NOT a P602 ... then next step is REPLACE PCM. Not pretty.
Obviously check connectors to PCM, but if that code keeps coming up ... well ..that's what the 2001 Manual shows.
Team Owner
Joined: Jul 2004
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From: NJ
St. Jude Donor '05-'08
Originally Posted by 98LS1CORVETTE
anyone else know what could have happened ........all cause i turn the car off and back on while i was driving
again i would not believe your battery. Change it out and eliminate that 100%. I talked to a guy a couple of weeks back and he thanked me for suggesting the battery. He also showed good volts across the battery, but the battery was no good.
Then start looking at fuses and connections. If you cant see anything wrong then you will have to get a tuner to look at it.
Racer
Joined: Mar 2005
Posts: 475
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From: Euless TX
I would clean the connections from the tac module to the pcm and see if that does anything. I had the same code in the past due to a shorted tac module and tac sensor on the tb. I had pinched some wires behind the intake when I installed my heads/cam that caused both of them to short.
Safety Car
Joined: Aug 2000
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From: San Rafael CA
Originally Posted by 98LS1CORVETTE
anyone got a PCM they wanna sell me ?? its been a week already and i cant figure out whats wrong with my car
When you turn the key to start the car, the BCM is in charge of SECURITY, and once it has decided that all is well (the resistor in the key matches what the BCM has stored, etc.) then the BCM sends the password to the PCM. Without the correct password, the PCM will not start the engine (I believe it will crank, it won't run).
At this point, if you've tried the following ...
1) new battery
2) checked ALL fuses
3) checked wiring for bad ground or exposed (bare) wiring
and you're still showing the P0601, then a dealer is about your only option. To reprogram, or install a new, PCM requires two things:
1) Tech 2 scan tool
2) Access to the GM Techline
The GM Techline access allows the Tech2 to get the correct software for your PCM based on your VIN. Without access to Techline, the Tech2 cannot reprogram your existing PCM, or a new one.