Powertrain Verification Test VER-4

1. Inspect the vehicle to ensure that all engine components are properly installed and connected. Reassemble and reconnect components as necessary.
2. With the DRBIII®, erase DTCs.
3. If the PCM was not replaced, go to step  7 and continue with the verification.
4. If the PCM was replaced, the correct VIN and mileage must be programmed or a DTC will set in the ABS and Air bag modules. In addition, if the vehicle is equipped with Sentry Key Immobilizer Module (SKIM), Secret Key data must be updated to enable start.
5. For ABS and Air Bag systems: Enter correct VIN and Mileage in PCM. Erase codes in ABS and Air Bag modules.
6. For SKIM theft alarm: Connect DRBIII® to data link connector. Go to Theft Alarm, SKIM, Misc. and place SKIM in secured access mode, by using the appropriate PIN code for this vehicle. Select Update the Secret Key data. Data will be transferred from SKIM to PCM.
7. Turn the speed control ON (if equipped, cruise light will be on).
8. Depress and release the SET Switch when the vehicle speed is greater than 35 MPH. The speed control should engage and maintain the selected speed.
9. Depress and hold the RESUME/ACCEL Switch. The vehicle speed should increase by at least 2 MPH.
10. Press and hold the COAST switch. The vehicle speed should decrease.
11. Using caution, depress and release the brake pedal. The speed control should disengage.
12. Bring the vehicle speed back up to 35 MPH.
13. Depress the RESUME/ACCEL switch. The speed control should resume the previously set speed.
14. Hold down the SET switch. The vehicle should decelerate.
15. Ensure vehicle speed is greater than 35 MPH and release the SET Switch. The vehicle should adjust and set a new vehicle speed.
16. Depress and release the CANCEL switch. The speed control should disengage.
17. Bring the vehicle speed back up above 35 MPH and engage speed control.
18. Depress the OFF switch to turn OFF, (Cruise light will be off). The speed control should disengage. If cruise control disengages, system is operating correctly. Repair is complete. If cruise control does not disengage, repair is not complete. Go to next step.
19. Overshoot/Undershoot Following Speed Control Set  - If the vehicle operator repeatedly presses and releases the SET button with their foot off of the accelerator (referred to as "lift foot set"), the vehicle may accelerate and exceed the desired set speed by up to 5 MPH.
20. It may also decelerate to less than the desired set speed, before finally achieving the desired set speed.
21. The Speed Control System has an adaptive strategy that compensates for vehicle-to-vehicle variations in speed control cable lengths.
22. When the speed control is set with the vehicles operators foot off of the accelerator pedal, the speed control thinks there is excessive speed control cable slack and adapts accordingly.
23. If the "lift foot sets" are continually used, a speed control overshoot/undershoot condition will develop.
24. To "unlearn" the overshoot/undershoot condition, the vehicle operator has to press and release the set button while maintaining the desired set speed using the accelerator pedal (not decelerating or accelerating).
25. Then turning the cruise control switch to the OFF position (or press the CANCEL button if equipped) after waiting 10 seconds.
26. This procedure must be performed approximately 10-15 times to completely unlearn the overshoot/undershoot condition.

Did the Speed Control pass the above test? If yes, repair is complete. If no, check for any related Technical Service Bulletins and/or go to appropriate CRUISE CONTROL article in ACCESSORIES & EQUIPMENT.