Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the anti-lock brake system (ABS) module	Circuitry ABS module	Go to PINPOINT TEST F .
Poor vehicle tracking during anti-lock function	Air in brake hydraulic system Hydraulic control unit (HCU)	Go to PINPOINT TEST G .
Poor vehicle tracking during anti-lock function	Base brake system	REFER to BRAKE SYSTEM-GENERAL INFORMATION .
The traction control is inoperative	Traction control switch Anti-lock brake system (ABS) module	Go to PINPOINT TEST H .
The traction control is inoperative	Base brake system	REFER to BRAKE SYSTEM-GENERAL INFORMATION .
The yellow ABS warning indicator does not self-check	Circuitry Instrument cluster Anti-lock brake system (ABS) module Powertrain control module (PCM)	GO to PINPOINT TEST I .
The yellow ABS warning indicator is always on	Circuitry Instrument cluster Anti-lock brake system (ABS) module Powertrain control module (PCM)	Go to PINPOINT TEST K .
The yellow ABS warning indicator is always on	ABS module connector not connected	CONNECT the ABS module connector.
Traction control active indicator always/never on	Circuitry Message center display Anti-lock brake system (ABS) module	REFER to INSTRUMENT CLUSTER .
The traction control cannot be disabled	Circuitry Traction control switch Anti-lock brake system (ABS) module	Go to PINPOINT TEST H .
Traction control switch indicator is always on	Circuitry Traction control switch Lighting control module (LCM) Anti-lock brake system (ABS) module	Go to PINPOINT TEST L .
Traction control switch indicator is never on	Circuitry Traction control switch Lighting control module (LCM) Anti-lock brake system (ABS) module	Go to PINPOINT TEST M .
Red brake warning indicator always on with the ABS lamp	Anti-lock brake system (ABS) subsystem (electronic brake distribution [EBD]) Circuitry Instrument cluster Powertrain control module (PCM)	RETRIEVE the DTCs. REFER to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
Red brake warning indicator always on without the ABS lamp	Parking brake Brake fluid level Instrument cluster Powertrain control module (PCM)	REFER to BRAKE SYSTEM-GENERAL INFORMATION .