Inspection and Verification

INSPECTION AND VERIFICATION

NOTE: If any concerns are noted with the speedometer, stoplamps, or horn, address those concerns by referring to their associated components before continuing speed control system diagnosis.

1. Verify the customer concern.
2. Verify the speedometer operates correctly without speed control by test driving the vehicle. If the speedometer does not operate correctly, refer to Instrument Panel, Gauges and Warning Indicators.
3. Verify the stoplamps operate correctly with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to Lighting and Horns.

Visual Inspection Chart:

4. Visually inspect for obvious signs of mechanical or electrical damage.
5. Check the wiring harness for obvious signs of shorts, opens, bad connections, or damage.
6. Verify that the throttle cable is adjusted correctly and not holding the throttle open or increasing the idle speed.
7. Make sure the throttle linkage operates freely and smoothly when connected to the speed control cable and speed control actuator.
8. If the fault is not visually evident, verify the symptom and go to the Self-Test Diagnostics.

Self-test Diagnostics

WARNING: This test is a key on, engine off (KOEO) test that is conducted only in PARK with the parking brake fully engaged. Failure to follow these instructions may result in personal injury.

NOTE:
- On vehicles equipped with a manual transmission, the clutch pedal needs to be applied in order to correctly perform the self-test. On vehicles equipped with an automatic transmission, the transmission selector lever needs to be in the PARK (P) or NEUTRAL (N) position.
- A review of the following steps is required before carrying out the self-test diagnostic procedure. After entering the diagnostic mode, the speed control actuator will time-out if the mandatory switch sequence is not completed within 5 seconds. If a time-out occurs, the procedure must be reinitiated.
- If the self-test cannot be entered, GO to Pinpoint Test A. Test A: The Speed Control Is Inoperative - No Flash Codes

Enter 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 actuator has entered the diagnostic mode. Five additional flashes at this point indicate a damaged speed control actuator. Release the OFF switch.

- Press the remaining switches in this sequence: ON, RES (resume), COAST and SET/ACC.
- 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.

- NOTE: There will be a slight delay when the last button is pressed and the lamp flashes.

A lamp flash with the last button (SET/ACC) indicates that the static test has passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is damaged. If the lamp does not flash with the last button, and additional flashes occur, follow the list below for trouble codes:
- 2 flashes: The BPP switch is damaged, the circuit is damaged, the brake pedal or clutch pedal is applied.
- 3 flashes: The speed control deactivator switch is open or the circuit is damaged.
- 4 flashes: The vehicle speed sensor is out of range or the circuit is damaged.
- 5 flashes: The speed control actuator is damaged.

- Immediately (0.25 second) 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 (0.04 to 0.39 inches) of travel from the idle position. During the dynamic throttle pull, observe the 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 that the throttle returns to the idle position. If an incorrect connection and/or binding or sticking of the speed control is observed, GO to Symptom Chart. Diagnosis By Symptom