Inspection and Verification

INSPECTION AND VERIFICATION

NOTE: If any concerns are noted with the speedometer, stoplamps, or horn, address those concerns before continuing speed control diagnosis.

1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the fault is not visually evident, verify the symptom and refer to self-test diagnostics.

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.

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 the self-test diagnostics by pressing 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. An additional 5 flashes at this point indicate an inoperative speed control actuator. Release the OFF switch.
- 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 and released. Press and release 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 speed control actuator will carry out a dynamic test automatically by actuating the throttle lever from 1 to 10 mm (.04 to .39 inch) of travel from the idle position. During the dynamic throttle pull, observe throttle movement to witness any binding or sticking of the speed control cable, verify the correct connection of the speed control cable to the throttle lever, and make sure the throttle returns back to the idle position. If incorrect connection or binding or sticking of the speed control is observed, go to the Symptom Chart. If no dynamic pull occurs at the throttle body GO to Pinpoint Test F. Diagnosis By Symptom Test F: The Speed Control Is Inoperative - Flash With Last Switch Pressed, But No Dynamic Pull Occurs At the Throttle
- Return the ignition switch to the OFF position and GO to Symptom Chart. Diagnosis By Symptom