Initial Inspection and Diagnostic Overview

NOTE: Look for problems in other areas that may affect the Anti-Lock Brake System (ABS) (suspension and steering components, tire integrity and air pressure, wheel bearings, and brake components that are common to all brake systems).

1. Verify concern by driving the vehicle.
2. If all systems and components are satisfactory, proceed with the visual inspection and then proceed to the ABS Quick Test. Quick Check/Symptom Tests

NOTE: The hydraulic anti-lock actuator assembly is non-serviceable, nor can it be pressure checked. If any of its components fail, it must be replaced as a complete unit.

3. Visually inspect the following components of the anti-lock brake system.

Mechanical Electrical

Insufficient brake fluid Blown fuse(s):
Damaged brake anti-lock sensor - 15A ENGINE
indicators - 15A METER
Damaged hydraulic anti-lock - 20A STOP
actuator assembly - 60A BTN
Damaged hydraulic system piping - 60A ABS
- 100A MAIN
Blown anti-lock brake warning
indicator
Shorted wires
Poor connections
Corroded connectors
Poor insulation
Damaged brake anti-lock sensors
/indicators
Damaged hydraulic anti-lock
actuator assembly
Damaged anti-lock relay
Damaged hydraulic anti-lock
actuator assembly solenoids or
motor
Damaged Brake ON/OFF (BOO)
switch
Damaged anti-lock brake control
module