Symptom Related Diagnostic Procedures

SYMPTOM TROUBLESHOOTING CHART - CRUISE CONTROL

Cruise Control Self-Test Diagnostics

WARNING: This test is a Key On Engine Off (KOEO) test only that is conducted in park only with emergency brake fully engaged.

- Enter Self-Test Diagnostics by depressing the speed control OFF switch while turning the ignition key ON making sure the engine does not start and is not running. The speed control indicator lamp on the instrument panel will flash once to indicate that the speed control module entered the diagnostic mode. Five additional flashes at this point indicate a defective speed control servo. Release the OFF switch.

NOTE: If the ON switch is not depressed within five seconds after entering diagnostic mode, the module times out and the procedure must be started over.

- Press the remaining switches in this sequence: ON, RSM (resume), CST (coast) and SET/ACCEL.
- The speed 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.
- After all five speed control switches complete the sequence, the indicator lamp will flash to indicate a pass or fail:
- 1 flash - Test passed (with dynamic throttle pull).
- 2 flashes - BPP switch is defective, circuit is defective or brake pedal is applied; CPP switch is defective, circuit is defective or clutch pedal is applied.
- 3 flashes - Brake deactivation switch is open or circuit is defective.
- 4 flashes - Vehicle speed sensor is out of range or circuit is defective.

- 0.25 seconds after the static test has passed, the speed 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 1: FLASH CODE 1 - NO DYNAMIC PULL AT CRUISE CONTROL SERVO. Pinpoint Test 1
- Return the ignition switch to the OFF position and proceed to the Symptom Troubleshooting Chart.

Symptom Troubleshooting Chart - Cruise Control Part 1:

Symptom Troubleshooting Chart - Cruise Control Part 2:

Symptom Troubleshooting Chart - Cruise Control Part 3:

Symptom Troubleshooting Chart

NOTE: Self-Test Diagnostics must be performed before proceeding to Symptom Troubleshooting Chart.