System Tests: Notes

Perform ABS functional check first. See ABS FUNCTIONAL CHECK  under TROUBLESHOOTING.

If any ABS trouble codes are set, diagnose and repair in accordance with trouble code(s) retrieved. See ABS TROUBLE CODE DEFINITIONS  under SELF-DIAGNOSTIC SYSTEM.

If no trouble codes exist, diagnose by symptom. Compare any symptoms with symptom diagnosis table. See SYMPTOM INDEX  table.

Symptom	Go To Test
No Power Assist (With Or Without Brake Indicator Lamp On)	C
High Pedal Effort (With Or Without Brake Indicator Lamp On)	C
Pump Does Not Run	C
Pump Runs For Extended Periods OF Time	C
Brake Lamp Stays On For More Than 20 Seconds After Key-On	C
Brake Lamp Illuminates While Braking	C
Brake Boost System Will Not Hold Pressure (Excessive Pressure Leakdown)	C
Brake Lamp Inoperative During Segment Check	D
LOW BRAKE FLUID Message Displayed At Key-On	E
BRAKE Indicator Lamp On & Power Assist Is Available	F
No System Power	G
Valve Cycling (Chatter) During Normal Stops	H
Low Or Spongy Brake Pedal	J
ANTI-LOCK DISABLED Message Displayed & No ABS Codes Present	K