Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
The red brake warning indicator is always/never on	Wiring, terminals or connectors Brake fluid level switch Parking brake switch Instrument Cluster (IC)	REFER to Diagnosis and Testing in INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES article.
The yellow ABS warning indicator is always/never on	DTCs present in the ABS module Wiring, terminals or connectors IC ABS module	RETRIEVE and RECORD any ABS module DTCs. If DTCs are present, GO to the ABS MODULE DTC CHART . If no DTCs are present, REFER to Diagnosis and Testing in INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES article.
The traction control/stability assist indicator ("sliding-car" icon) is never/always on	DTCs present in the ABS module Wiring, terminals or connectors IC PCM ABS module	RETRIEVE and RECORD any ABS module DTCs. If DTCs are present, GO to the ABS MODULE DTC CHART . If no DTCs are present, REFER to Diagnosis and Testing in INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES article.
No communication with the ABS module	Fuse Wiring, terminals or connectors ABS module	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the no communication problem.
No communication with the IC	Fuse Wiring, terminals or connectors IC	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the no communication problem.
Spongy brake pedal with no warning indicator	Air in the brake hydraulic system	INSPECT the brake pedal and bracket for damage or incorrect installation. REPAIR or INSTALL new as necessary. If the brake pedal and bracket are OK, BLEED the brake system and Hydraulic Control Unit (HCU). REFER to Brake System Bleeding in BRAKE SYSTEM - GENERAL INFORMATION article.
Poor vehicle tracking during anti-lock function	Air in the hydraulic brake system HCU	GO to PINPOINT TEST J .
	Base brake system	REFER to BRAKE SYSTEM - GENERAL INFORMATION article.
Unintended ABS activation with no DTCs present	Incorrect or worn tires Underinflated tire(s) Suspension components Missing, damaged or misaligned wheel speed sensor tone rings	INSPECT the wheels and tires, front and rear suspension and the wheel speed sensor tone rings. REPAIR or INSTALL new as necessary.
The traction control system is inoperative	The traction control system is turned off.	VERIFY that the traction control system is turned on. CARRY OUT the ABS module and IC self-tests. RETRIEVE and RECORD any DTCs. REFER to the ABS MODULE DTC CHART and/or the INSTRUMENT CLUSTER (IC) DTC CHART .
	DTCs present in the ABS module	CARRY OUT the ABS module self-test. RETRIEVE and RECORD the ABS module DTCs. GO to the ABS MODULE DTC CHART .
	High Speed Controller Area Network (HS-CAN) bus	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the no communication concern.
	Wiring, terminals or connectors Traction control switch IC PCM	GO to PINPOINT TEST K .
The traction control system cannot be disabled	MyKey™-restricted key in use with AdvanceTrac® always-on feature configured to "on" Wiring, terminals or connectors Traction control switch IC	GO to PINPOINT TEST L .