Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the ABS module	Wiring, terminals or connectors ABS module	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the no communication problem.
The red brake warning indicator and the yellow ABS warning indicator are both illuminated	DTCs present in the ABS module	REFER to the ABS Module DTC Chart .
The red brake warning indicator is illuminated and the yellow ABS warning indicator is not illuminated	Wiring, terminals or connectors Parking brake Brake fluid level sensor Instrument Cluster (IC) ABS module	REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES article to continue diagnosis of the warning indicator.
The yellow ABS warning indicator is never on	Wiring, terminals or connectors IC	REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES article to continue diagnosis of the warning indicator.
The stability/traction control indicator is never on	Wiring, terminals or connectors IC ABS module	REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES article to continue diagnosis of the indicator.
The stability/traction control indicator flashes once every 2 seconds	Incomplete stability/traction control calibration	CALIBRATE the ABS module. REFER to STABILITY/TRACTION CONTROL SYSTEM SENSOR CALIBRATION .
Unintended ABS activation at low speeds or near the end of stopping the vehicle	ABS wheel speed sensor tone ring	INSPECT the tone rings for damage. INSTALL new as necessary.
Traction control cannot be disabled	MyKey™-restricted key in use with AdvanceTrac® always-on feature configured to "on" Wiring, terminals or connectors Stability/traction control switch ABS module	GO to PINPOINT TEST H .