Component Tests and General Diagnostics

SYSTEM DISABLED
Fault conditions are detected by the ABS/TC CM which disables the ABS and fraction control until the fault is rectified. The ABS and traction control warning lights on the instrument pack remain lit whilst a fault exists. The system will be disabled when the following conditions occur:
^ Valve failure
^ Sensor failure
^ Main driver failure (internal ABS/TC CM fault)
^ Redundancy error (internal ABS/TC CM fault)
^ Overvoltage/undervoltage
^ Pump motor failure.
^ Throttle valve actuator motor failure (traction control vehicles only).
^ Throttle valve actuator potentiometer failure (traction control warning light only).

Inhibit
ABS/traction control is inhibited until the sensed speed returns to within an acceptable limit, where upon ABS/traction control is restored. Conventional braking is unaffected. Depending on vehicle speed the ABS/traction control warning lights may come on.

Disable
ABS/traction control is Disabled (switched off) and the ABS/traction control warning lights come on. The system will not be restored until the engine is switched off and restarted or the fault has been rectified. After the system has been disabled, the warning lamps remain on until the vehicle has reached a speed of 20 km/h during the first ignition cycle after fault rectification.