Symptom Chart

Condition	Possible Sources	Action
No communication with the anti-lock brake system (ABS) module	Fuse Circuitry ABS module Controller area network (CAN) communication link	Go to Pinpoint Test A .
The red brake warning indicator does not self-check	Low brake fluid warning switch Circuitry Instrument cluster Ignition switch Parking brake	REFER to INSTRUMENT CLUSTER article.
The red brake warning indicator stays on when the ignition switch is in RUN	Low brake fluid warning switch Circuitry Instrument cluster Ignition switch Parking brake	REFER to INSTRUMENT CLUSTER article.
The yellow anti-lock brake system (ABS) warning indicator is always on	Circuitry ABS module Instrument cluster	Go to Pinpoint Test H .
Spongy brake pedal with no warning indicator	Air in brake hydraulic system	Go to Pinpoint Test I .
Poor vehicle tracking during anti-lock function	Air in hydraulic brake system Hydraulic control unit (HCU)	Go to Pinpoint Test J .
	Base brake system	REFER to BRAKE SYSTEM - GENERAL INFORMATION article.
The traction control switch indicator is inoperative	Circuitry Traction control switch Instrument cluster	REFER to INSTRUMENT CLUSTER article.
The traction control indicator stays on continuously with no DTCs retrieved	Circuitry Instrument cluster Traction control switch	REFER to INSTRUMENT CLUSTER article.