Fail-Safe System Check

1. When control module senses a fault, cruise control operation is suspended and CRUISE indicator light blinks, until fault no longer is apparent. The following conditions can cause fail-safe system to operate:
   • Steering wheel command switch stuck.
   • Vacuum motor power or ground open.
   • Vacuum air or release valve ground open.
   • Vacuum air or release valve power circuit open or shorted.
   • Vehicle speed sensor faulty.
   • Control module internal malfunction.
   • Brake cancel switch or stoplight switch faulty.
2. Turn ignition and cruise control switch on. If CRUISE indicator light does not blink, go to next step. If CRUISE indicator light blinks, perform the following procedures in order listed.
   • COMMAND SWITCH CIRCUIT CHECK 
   • PUMP CIRCUIT CHECK 
   • VEHICLE SPEED SENSOR CIRCUIT CHECK 
3. Drive vehicle and turn cruise control main switch on. Press cruise control SET/COAST switch. If CRUISE indicator light does not blink, go to next step. If CRUISE indicator light blinks, perform the following procedures in order listed.
4. With ignition on and cruise control main switch on, press brake pedal for at least 5 seconds. If CRUISE indicator light does not blink, cruise control module is not detecting a fault. If CRUISE indicator light blinks, perform CLUTCH & BRAKE CANCEL CIRCUIT CHECK  .

If no faults are found and CRUISE indicator light still blinks, replace cruise control module.

• PUMP CIRCUIT CHECK 
• VEHICLE SPEED SENSOR CIRCUIT CHECK 

If no faults are found and CRUISE indicator light still blinks, replace cruise control module.