1. Verify the customer concern by operating the cruise control system.
2. Visually inspect for obvious signs of mechanical and electrical damage using the following chart:
Mechanical
|
Electrical
|
---|---|
• Speed control cable
|
• Central junction box fuse
• Brake switch
• Brake switch 2
• Clutch switch (MTX)
• TR switch (ATX)
• Circuitry
• Cruise control switch
|
3. Check the wiring harness for obvious signs of shorts, opens, bad connections, or damage.
4. Verify that the speedometer and brake light function correctly.
5. Verify that the throttle cable is adjusted correctly and not holding the throttle open or increasing idle speed.
6. Make sure the throttle linkage operates freely and smoothly when connected to the cruise control cable and cruise actuator.
7. If the fault is not visually evident, verify the symptom and proceed to the Symptom Chart.
• Enter self-test diagnostics by depressing the cruise control OFF switch while turning the ignition key on, making sure the engine does not start and is not running. The cruise control indicator light on the instrument cluster will flash once to indicate that the cruise actuator has entered the diagnostic mode. Five additional flashes at this point indicate a defective cruise actuator. Release the OFF switch.
• Press the remaining switches in this sequence: ON, RSM (resume), CST (coast) and SET/ACCEL.
• The cruise control indicator light will flash as each switched is pressed. Press each switch in the sequence immediately after the light goes out for the previous switch.
• A light flash with the last button (SET/ACCEL) indicates that the STATIC test has passed. If the light does not flash with the last button and there are no additional flashes of the light, the switch is defective. If the light does not flash with the last button, and additional flashes occur, follow the list below for trouble codes:
• Immediately (0.25 second) after the static test has passed, the cruise actuator will carry out a dynamic test automatically by actuating the throttle lever from 1 - 10 mm (0.04 - 0.39 in.) of travel from the idle position. During the dynamic throttle pull, observe throttle movement to witness any binding or sticking of the actuator cable, verify the correct connection of the actuator cable to the throttle lever, and make sure that the throttle returns to the idle position. If incorrect connection and/or binding or sticking of the cruise control is observed, go to the Symptom Chart.