System Initialization

System initialization starts when the key is turned to "RUN". At this point, the CAB performs a complete self-check of all electrical components in the anti-lock brake system.

At 19 km/h (12 mph), the pump motor is briefly activated to ensure operation, and wheel speed sensor circuitry is checked. If the brake pedal is applied when the vehicle reaches 19 km/h (12 mph), this check will be delayed until 40 km/h (25 mph). If, during the dynamic test, the brake pedal is applied, the driver may feel the test through brake pedal pulsations. This is a normal condition. Throughout the remainder of the drive cycle, ongoing tests are performed, and the CAB monitors ABS circuit for continuity.

If any component causes a diagnostic trouble code during system initialization or dynamic check, the CAB will illuminate the ABS warning indicator.