Initial Inspection and Diagnostic Overview

PERFORM THE FOLLOWING VISUAL INSPECTIONS BEFORE DOING ANY DIAGNOSTIC TESTING.

If a malfunction is not resolved by the visual inspection, proceed with diagnostic testing according to the instructions in testing and Inspection.
See Locations, Component for pictures identifying the location of system components.

Brake Fluid Level
Visually inspect for the proper fluid level within the fluid reservoir.

Hydraulic Control Unit
Visually inspect the hydraulic assemblies for leaks and for damaged or disconnected connector.

Fuses
Visually inspect that all fuses are properly installed.

Wheel Speed Sensor Connectors
Visually inspect both front wheel speed sensor connectors for damage or disconnection. Inspect the rear axle speed sensor connectors.

Brake Fluid Lines
Visually inspect brake fluid lines for any leaks or damage.

Wheel Speed Sensors
Visually inspect all three wheel speed sensors and tone wheels for any damage.

Controller Antilock Brake (CAB)
Visually inspect the CAB for a secure mounting and the CAB connector for damage or loose connection.

Base Brake System
Visually inspect the condition of the parking brake, rotors, drums, and calipers.