2004 Z06

Semi track car - no A/C, air pump or etc.
Was running fine all year.

Had tranny and diff out to fix oil leaks. Installed some new bushings etc. Got car running w/ no issues and been driving it about 2 weeks. Interior was stripped so console was removed.

3 days ago:

SERVICE VEHICLE SOON
And the TCS light was on

Stayed a couple days -then reset itself

Driving yesterday it died.

P0530 H C

C1247 H
C1276-H
C1277-H

B0432H

U1040H

B0361-H
B0367-H
B0441-H

Car will crank fine.

Car will hit once/twice but then not again and not enough to run.

Has fuel

Paging Bill Curlee

-Ken

 

Is your security light on?

 

Key in it flashes

Cranking it goes steady

I feel some embarrasment coming at me.....

 

How are you reading the DTC. Thru the DIC/IPC?

I really dont see any DTCs that would cause it NOT to start. Are ALL your ENGINE GROUNDS clean and tight G-105, G-106 and G-107

107 is on the back of the head and is used for the COIL and Injectors



If not, try this

READING YOUR Engine Diagnostic Trouble Codes (DTC)

This procedure should be carried out any time you experience a problem with your C5. Most inexpensive store bought aftermarket code readers will ONLY read power train DTC’s. Reading the DTC’s with the C5 built in code reader will allow you to read ALL the modules in the vehicle.

The Diagnostic Display Mode is entered with the following procedure:
1) Turn on the ignition but don't start the engine.
2) Press the RESET button to turn off any warning messages. (i.e. door open, trunk open ect)
3) Press and hold the OPTIONS button
4) While holding OPTIONS, press FUEL button four times within a 10 -second period.

Initially, the on-board diagnostics go into an Automatic Mode which will cycle through each module and shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each module. ( i.e. PCM = 4 codes) If none are present in a given module, you will see No More Codes on the display.

There are two types of diagnostic codes, Current and History designated with a letter suffix, “C” or “H”. A current code indicates a malfunction is present in the module displaying data. A history code indicates a problem existed sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes. More likely it's an indication of an intermittent malfunction.

Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module that does not operate with the key on and engine off, a special diagnostic tool called a Scan Tester is necessary to properly diagnose the malfunction.

Once the system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except E/M. Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present; press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press RESET To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory. If you clear the code/s, and extinguish the Check Engine Light, your emissions status ready will NOT allow you to pass an emissions test until you have completed the required driving cycles. There are a few body module DTC’s that if set will prevent the module from operating properly. Once the DTC is cleared, the module will return to full function. This is not true for power train DTCs.

If you have never read and cleared your codes, there will probably be a lot of old history DTCs. It is recommended that you clear your codes and see if any come back during a driving cycle. Those are the ones that you need to concentrate on diagnosing.

Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5.

You can read the DTCs while the engine is running. If you turn the engine OFF and then back ON, that can clear some DTCs that may be important with identifying a problem. One example is a Misfire DTC (p-0300) If the engine is shut down, the DTC will clear.

These are some very good C5 Diagnostic Trouble Code (DTC) explanation web sites!!! They also explain how to read the DTCs

Here are some very good sites that explain what DTC mean:

http://www.gearchatter.com/viewtopic11755.php

http://www.obd-codes.com/trouble_cod...d-ii-codes.php

Make sure to include the H or C suffix when you post your DTCs!!


Let me know what you figure out with the DTCs and ground look.

Bill

 

There have been a few instances where the IGNITION SWITCH has one or more of the 5 outputs that fail because of carboned up contacts. Its something to keep in the back of your head if it comes down to not finding anything else. Usually the DTCs point me in that direction with a lot of NO COMMS or U series or BATTERY 1 & 2 voltage issue DTCs.



Check this post:

-C5 ignition Switch repair - http://forums.corvetteforum.com/c5-t...ch-repair.html

Bill

 

You still should see some B series DTCs for the pass key detection circuit issues. B2721, 2722, 2723, 2725 Thats why I asked how you were reading your DTCs

 

I read the codes using the DIC. Only thing I did wrong was maybe not getting each H or C but I think that was right.

This occurred suddenly and completely while driving.

I am going to check the grounds first - I need to push it up on ramps to get it on the lift.

Thanks all for the direction.

PS -

The fob is not exactly around at the moment and the door has not been locked for a while.

 

Loose ground - yeah!