Symptom Chart

WARNING: This page is about a different car, the 2005 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

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 .