Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the ABS module	Fuse Wiring, terminals or connectors ABS module	REFER to MODULE COMMUNICATIONS NETWORK , The ABS Module Does Not Respond To The Scan Tool.
No communication with the Instrument Panel Cluster (IPC)	Fuse Wiring, terminals or connectors IPC	REFER to MODULE COMMUNICATIONS NETWORK , The IPC Does Not Respond To The Scan Tool.
The red brake warning indicator is always/never on	Wiring, terminals or connectors Brake fluid level switch Parking brake switch IPC	REFER to Diagnosis and Testing in INSTRUMENTATION, MESSAGE CENTER & WARNING CHIMES .
The yellow ABS warning indicator is always/never on	Wiring, terminals or connectors IPC 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 INSTRUMENTATION, MESSAGE CENTER & WARNING CHIMES . If scan tool is unable to communicate with the ABS module, REFER to MODULE COMMUNICATIONS NETWORK .
The stability/traction control indicator (sliding-car icon) is never/always on	Wiring, terminals or connectors IPC 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 INSTRUMENTATION, MESSAGE CENTER & WARNING CHIMES .
The stability/traction control OFF indicator (sliding-car OFF icon) is never/always on	Wiring, terminals or connectors IPC 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 INSTRUMENTATION, MESSAGE CENTER & WARNING CHIMES .
Spongy brake pedal with no warning indicator	Air in the brake hydraulic system Base brake system	REFER to BRAKE SYSTEM - GENERAL INFORMATION .
Unintended ABS activation with no DTCs present	Incorrect or worn tires Under inflated tire(s) Worn or damaged suspension components Missing, damaged or misaligned wheel bearing magnetic strips	INSPECT the wheels and tires, front and rear suspension and the wheel bearing magnetic strips. REPAIR or INSTALL new as necessary.