Traction control/ABS problem...
C1255EBTCM Internal Malfunction
These were both current and would not clear. I checked all sensors I am aware of and everything looked good. The next morning I checked the codes and those 2 are gone but now I have a C1226H.
So today I check again just before typing this up and I have..
C1226H, C1233HC, C1255H, C1291H, C1292H. I cleared all but the C1233C that obviously is current.
Now each time I get in it's beeping and fashing and freaking out, over the 1233C.
So any ideas? This happened a couple times before with the old motor and loss of traction in Competitive Mode. But it cleared and was not a problem. '
Thanks in advance everyone who may know anything. :confused:
[Modified by BADBLACK99, 12:41 AM 8/28/2003]
Circuit Description
The speed sensor used on this vehicle is a single point magnetic pickup. This sensor produces an AC signal that the EBCM uses the frequency from to calculate the wheel speed.
Conditions for Setting the DTC
The DTC can be set any time the ignition is in the ON position, and the EBCM senses an open, a short to ground, or a short to battery.
Action Taken When the DTC Sets
ABS/TCS/Active Handling (if equipped with RPO JL4) are disabled.
Indicators that turn on:
ABS indicator
Car Icon (TCS indicator)
Messages displayed on the DTC:
Service ABS
Service Traction System
Service Active HNDLG (if equipped with Active Handling RPO JL4)
Conditions for Clearing the DTC
Condition for DTC is no longer present and scan tool clear DTC function is used.
Fifty ignition cycles have passed with no DTCs detected.
Diagnostic Aids
It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
If an intermittent malfunction exists refer to Testing for Electrical Intermittents in Diagrams, Diagnostic Aids.
Test Description
The numbers below refer to step numbers on the diagnostic table.
Checks for an open in the WSS or WSS CKT.
Checks for a short to ground in the WSS or WSS CKT.
Checks for a short to voltage in the WSS CKT.
Checks for a short to voltage in the WSS CKT.
WSS = Wheel Speed Sensor





