Cruise Control Self-Test Diagnostics
WARNING:
- This test is a key on engine off (KOEO) test that is only conducted with the transmission in PARK (automatic) or NEUTRAL manual), and the parking brake fully applied. Failure to follow these instructions may result in personal injury.
NOTE:
- A review of the following test steps is required before carrying out the self-test diagnostic procedure. After entering the diagnostic mode, the module will time out if the mandatory switch sequence is not completed within 5 seconds. If a module time out, occurs the procedure must be reinitiated.
- 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 lamp on the instrument panel will flash once to indicate that the cruise control module entered the diagnostic mode. Five additional flashes at this point indicate a defective cruise control servo. Release the OFF switch.
- Press the remaining switches in this sequence: ON, RSM (resume), CST (coast) and SET/ACCEL.
- The cruise control indicator lamp will flash as each switch is pressed. Press each switch in the sequence immediately after the light goes out for the previous switch.
NOTE:
- There will be a slight delay when the last button is pressed and released and the lamp flashes.
- A lamp flash with the last button (SET/ACCEL) indicates that the STATIC test passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is inoperative. If the lamp does not flash with the last button, and the additional flashes occur, follow the list below for diagnostic trouble codes:
- 2 flashes: brake pedal position (BPP) switch is damaged, circuit is damaged, or brake pedal is applied; clutch pedal position (CPP) switch is damaged, circuit is damaged, or clutch pedal is applied.
- 3 flashes: brake deactivation switch is open or circuit is damaged.
- 4 flashes: vehicle speed signal is out of range or circuit is damaged.
- 0.25 seconds after the static test has passed, the cruise control servo will then perform a dynamic test automatically by actuating the throttle lever from 1 mm to 10 mm 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 proper connection of the actuator cable to the throttle lever, and make sure the throttle returns back to the idle position. If improper connection and/or binding or sticking of actuator is observed, go to SYMPTOM TROUBLESHOOTING CHART . If no dynamic pull occurs at the throttle body go to CRUISE CONTROL SYSTEM PINPOINT TEST 6: FLASH WITH LAST SWITCH PRESSES BUT NO DYNAMIC PULL OCCURS AT THE THROTTLE .
- Return the ignition switch to the OFF position and proceed to the SYMPTOM TROUBLESHOOTING CHART .