Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the ABS module	Fuse Wiring, terminals or connectors ABS module concern	REFER to MODULE CONFIGURATION to diagnose the no communication concern.
The red brake warning indicator is always/never on	Instrument Panel Cluster (IPC) concern ABS concern	RETRIEVE all DTCs and REFER to the DTC Charts . If no DTCs are present, REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES .
The yellow ABS warning indicator is always/never on	IPC concern ABS concern	RETRIEVE all DTCs and REFER to the DTC Charts . If no DTCs are present, REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES .
The stability/traction control indicator "sliding-car icon" is never/always on	IPC ABS concern	RETRIEVE all DTCs and REFER to the DTC Charts . If no DTCs are present, REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES .
ABS false activation, ABS too sensitive, ABS activates on normal stop	Front/rear suspension concern	ELIMINATE the front/rear suspension as the cause of the problem. For front suspension, REFER to FRONT SUSPENSION . For rear suspension, REFER to REAR SUSPENSION .
	RCM mounting	REFER to SUPPLEMENTAL RESTRAINT SYSTEM to confirm the RCM is mounted correctly.
	Loose wheel speed sensor/excessive air gap	INSPECT wheel speed sensor for looseness or excessive air gap. TIGHTEN or INSTALL new as necessary. REFER to WHEEL SPEED SENSOR - FRONT or WHEEL SPEED SENSOR - REAR .
	Parking brake shoes out of adjustment (dragging)	CHECK and if necessary, ADJUST the parking brake shoes. REFER to PARKING BRAKE AND ACTUATION .
The traction control system cannot be disabled	IPC message center If a MyKey® restricted key is in use with the AdvanceTrac® always-on feature configured to "on", the traction control system cannot be disabled. An admin key must be used in order to enable and disable the traction control system	GO to PINPOINT TEST O .