Hi all, I am getting the following messages constantly on my 2001 C5

Service ABS

Service Traction System

Service Active Hndling

Can anyone let me know what these are all about and how to resolve? Thanks.

 

Got to pull and post your codes like 8VETTE7 says. With out those it will just be a guess.

 

Will do. Thanks.

 

try unhooking the battery overnight. It worked on mine. haven't seen the message in months.

 

WHY on earth would you DISCONNECT THE BATTERY when you can read and clear ALL the DTCs while sitting in the drivers seat???????!!!!!!!

That method worked great for the old GM OBD 1 cars!!!

You have an OBD2 PCM and disconnecting the battery does more harm than good. You are bound to set random DTCs upon reconnecting the battery. When you disconnect the battery you also will have EMISSION STATUS NOT READY flags set in the PCM and if you have to have an emissions check, the car will NOT PASS until you complete the required driving cycles.

BAD INFO!

When you turn the ignition OFF, the DTCS in the EBTCM for the most part get cleared. When you turn the ignition ON, the EBTCM runs a status check and system test. Any DTCS that are set during that test, need to be read WITH IN THAT IGNITION ON CYCLE!

So, when the messages are displayed "Read the DTCs without turning the ignition off!" and post what DTCs are in memory.
An example of a complete DTC is : C 0221 H Or C 0308 C

Ive attached a list of C5 DTCs

Here is the procedure for reading the codes from the drivers seat!

READING YOUR C5 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.

NOTE and a WARNING. You can read the DTCs while the engine is running. I pull mine up all the time while driving.
WARNING. Don’t become distracted while reading DTCs while your driving and cause an accident!!!!! Use common sense and drive safe.

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!!

NOTE!!! Start the car and let it idle. Then take it for a drive and cause the problem to occur. When you return home pull the codes BEFORE you shut off the engine.


Do NOT discount the codes with the H following them. They can provide an audit trail for issues going on with the car. They ARE important in diagnosing problems.

Post ALL the codes that you pull with the engine running..........

Some codes go away WITHOUT setting an H code when you shut the engine off. I suspect you will have several codes that will show C or HC that do NOT show when the engine is turned off.

 

The code that I am getting is C1214 HC. Appears to a solenoid or valve problem. The following codes all had "H" behind them

1431
U1064
U1255
U1096
U1000
U1064
U1096
U1255

I'll check the sites provided when I get home to my own computer. In the meantime, does the sequence of codes ring a bell of any particular problem to anyone?

 

Thanks 8VETTE7. I'll get on it.

Bill Curlee, seems that pics for the "Electical Info Thread" are not posted anymore. Do you still have those you can send me?

 

Could you please copy and paste the link to the thread that has the broken links and I will try to repair it or figure out what pictures that you need.

BC

 

Here you are Bill Curlee. Thanks.


http://forums.corvetteforum.com/c5-t...tion-long.html

 

Bill, I can see the pictues here on my home computer. Must be some kind of block on my business computer. Anyways thanks very much.