Initial Inspection and Diagnostic Overview
InspectionBefore performing diagnostics, check the following items which might affect ABS problems:
1. BATTERY
Measure battery voltage and specific gravity of electrolyte.
Standard voltage: 12 V, or more
Specific gravity: Above 1.260
2. BRAKE FLUID
1. Check brake fluid level.
2. Check brake fluid leakage.
3. HYDRAULIC UNIT
Check the hydraulic unit.
4. BRAKE DRAG
Check brake drag.
5. BRAKE PAD AND ROTOR
Check brake pad and rotor.
6. TIRE
Check tire specifications, tire wear and air pressure.
ABS WARNING LIGHT ILLUMINATION PATTERN
INSPECTION
1. When the ABS warning light does not illuminate in accordance with this illumination pattern, there must be an electrical malfunction.
2. When the ABS warning light remains constantly OFF, repair the ABS warning light circuit or diagnosis circuit.
NOTE: Even though the ABS warning light does not go out 1.5 seconds after it illuminates, the ABS system operates normally when the warning light goes out while driving at approximately 12 km/h (7 MPH). However, the Anti-lock brakes do not work while the ABS warning light is Illuminated.