Chrysler Concorde 2004 Service Manual page 1138

BRAKES (CAB)
Symptom:
*TRAC ON INDICATOR NEVER/ALWAYS ON
FAILS KEY-ON BULB TEST
CHECK TRACTION CONTROL OPERATION
RECHECK TRAC ON INDICATOR
CAB - NO TRAC ON INDICATOR
TEST
1 NOTE: The DRBIII must be able to communicate with the CAB prior to
performing this test.
Note: If any CAB DTC's are present, they must be repaired prior to
performing this test.
Perform the KEY-ON bulb test.
Did the Trac On indicator illuminate and then go out?
Yes → Go To 2
No
2 Make sure the Traction Control system has not been deactivated with the TRAC OFF
switch.
NOTE: The purpose of this test is to determine if the Traction Control
system is operating.
With the DRBIII in Inputs/Outputs, read the ABS Pump Motor voltage state.
Accelerate sufficient to cause drive wheel slip.
Does the DRBIII display approximately 9 volts?
Yes → Go To 3
No
3 Replace the Instrument Cluster in accordance with the Service Information.
Make sure the Traction Control system has not been deactivated with the TRAC OFF
switch.
NOTE: The purpose of this test is to determine if replacing the Instrument
Cluster has corrected the problem.
Accelerate sufficient to cause drive wheel slip.
Does the TRAC ON indicator illuminate during Traction Control activation?
Yes → Repair is complete.
No
POSSIBLE CAUSES
ACTION
→ Refer to INSTRUMENT CLUSTER for the related symptom(s).
Perform ABS VERIFICATION TEST - VER 1.
→ Replace the Controller Anti-Lock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
Perform ABS VERIFICATION TEST - VER 1.
→ Replace the Controller Anti-Lock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
42
APPLICABILITY
All
All
All