2000 A4 coupe....

been getting service traction control system and service ABS warning ...

cleared the codes and then ran through diagnostics after a drive and this is what it gave me:

28 TCS 1243H

A6-SCM B2860H

what the heck do they mean and where should I start???

Thanks

Sully

 

Damn -- I started getting the same two DIC messages on my way home from work today. Not trying to HI-jack the thread - how do I check the codes. I am interested to see If I am getting the same error codes. I know there is a process foe showing the codes on the DIC, but don't want to look it up.

 

hey man,

go out to the vette, turn the key on but do not start the engine...
wait for everything to turn on and then clear the DIC... by hitting the reset... then hold down the options button, then press fuel 4 times....it will then go through the whole list of all the systems and after the initial scroll you can go back using the other buttons on that key pad to navigate... I'd clear all the codes by holding down the reset and then drive the car aroudn the block and see what is there when you get back home

hth,

Sully

 

Sulley -- thanks for the info. I found my current code and erased the history codes. Will drove car to see of they keep coming back.

Here is what I could find in my 2001 manuals on the codes - it should be similar --- some of the systems will probably be different from 2001 to 2004

28 TCS 1243H History code - traction control system - relates to the traction control pump and if it is getting correct signal to open and close control relay. Requires Tech 1 to correctly diagnose. Might be a dealer fix unless you have the Tech 1

A6-SCM B2860H Seat control module - History code - something to do with seats, my factory manual does not list that code so I can't help on that one. Are the seats working properly ??

Hope that this helps.

 

come on guys... someone has got to know more on these dang codes...

the car has done this for a few days straight... and then nothing this morning.... hopefully it will stay this way during all the rain we are supposed to get from Ike... but I'd still like some answers as to where to start looking...

sully

 

anyone else have any idea or suggestions???



28 TCS 1243H History code - traction control system - relates to the traction control pump and if it is getting correct signal to open and close control relay. Requires Tech 1 to correctly diagnose. Might be a dealer fix unless you have the Tech 1


thanks,

Sully

 

Yep, dive into the service manual and use the troubleshooting procedure.

 

...another Forum Member wrote this....
Service ABS/Service Traction Control DTC C1243 H

I have had this problem with my wifes 98 C5 now for going on 6 months. I have worked on it on and off as my electronics service job permits since I travel for work. I followed the advise on the forum about checking and cleaning the ground connections as well as other suggestions. Nothing seemed to make a difference until I ran across the thread about a member who was clearing the code while driving and then slamming on the brakes to activate the ABS. I know when the car is started the system turns the ABS pump on and off and if the voltage readback is not high enough the code C 1243 is set and you get the messages. Since I do not have the interface connector for the EBCM I pulled the module away from the pump section. I measured the resistance of the pump motor from pin number 8 ((from left to right) (it is the first pin on the right hand connector))to the frame ground and it was in spec according to the manual. In my job we also use different size pumps for pressure and vaccum. When a pump is new or has been rebuilt it requires some break in period. If a pump has been used and off for some period of time it will also draw more current due to sediment build up and not being exercised. With this in mind I pushed a wire into pin 8 and ran it over close to the positve post of the battery so I could exercise the pump manualy. The pump came on the first time I touched the positive post but sounded sluggish. I exercised the pump about 6 more times for about 15 to 20 seconds at a time. I put the EBCM back on the pump section cleared the codes and so far the car has been running for one week now with only one message the first day after this procedure that message cleared on the next start by itself. If you try this use a heavy gauge wire and be aware the wire may get warm as you touch the battery. The pumps on these ABS units are most likely not broken in since they hardly run durring the life of the car. 3/23/08 The car has been running fine with no more Traction control codes or Service ABS messages now for three weeks. If I can be of any help to other members experiencing this nightmare drop me a line or a reply. 4/11/08 The car has been running grreat with no problems now for six weeks.

 

funny thing how this thing works... last two days no warning lights and no problems... I hope I just need to flush that pump! is this kind of the things you guys have experienced too?

Sully

 

I had a website with all the codes displayed and what they meant,but it crashed along with my computer

Somebody must have it.......post up fellas,I may need it again!!!

 

well I had the service Traction and ABS lights first thing this morning but twice at lunch no lights or warning at all.... isn't this a good thing when the problems are intermittent? I did clear the codes again and then went out and slammed on the brakes a few times... i read on another post that activating the ABS system pump can solve the problem that is throwing the coding???? what do you guys think?

thanks,

Sully

 

READING YOUR Engine Diagnostic Codes (DTCs)

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 OPTIONS
4) While holding OPTIONS, press FUEL four times within a 10-second period.

Initially, on-board diagnostics go into an Automatic Mode which 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. ( 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 kinds 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.
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.

These are the absolute best C5 Diagnostic Trouble Code (DTC) explanation web sites!!!

http://www.corvettedoctor.com/Code_Main.html
http://www.corvettedoctor.com/index.html


Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\

Here is another very good site:

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

Make sure to include the H or C suffix!!