Fail-Safe System Check
- When ASCD control unit senses a fault, cruise control operation is deactivated. CRUISE indicator light will flash until fault is no longer apparent. The following conditions can cause fail-safe system to operate:
- Steering switch stuck.
- ASCD pump motor power or ground circuit open or shorted.
- Air valve power or ground circuit open or shorted.
- Release valve power or ground circuit open or shorted.
- Vehicle speed sensor faulty.
- ASCD control unit internal malfunction.
- Brake cancel switch or stoplight switch faulty.
- Turn ignition on. Turn cruise control main switch to ON position. If CRUISE indicator light does not flash, go to next step. If CRUISE indicator light flashes, perform STEERING SWITCH CHECK .
- Drive vehicle at a speed greater than 30 MPH. Turn cruise control main switch to ON position. Press SET/COAST switch. If CRUISE indicator light does not flash, go to next step. If CRUISE indicator light flashes, perform VEHICLE SPEED SENSOR CHECK and PUMP CIRCUIT CHECK
. If no faults are found and CRUISE indicator light still flashes, replace ASCD control unit.
- While driving vehicle with cruise control main switch in ON position, slowly depress brake pedal for at least 5 seconds. If CRUISE indicator light does not flash, cruise control system is okay at this time. If CRUISE indicator light flashes, perform BRAKE &/OR CLUTCH CANCEL SWITCH CHECK .