Powertrain Verification Test - Ver 4A

VERIFICATION TEST VER-4A

Applicability - Diesel

1. Check if any of the following conditions exist.

2. The ECM has been disconnected or replaced.

3. The Battery power has been disconnected.

4. The APPS has been disconnected or replaced.

5. If any of the conditions exist, perform the following steps, otherwise, go to step 8.

6. APPS Programming Procedure: Reassemble all components. Turn the ignition key to the ON or RUN position. Without starting the engine, slowly press the throttle pedal to the floor and then slowly release.

7. This step must be done (only once) to ensure the Accelerator Pedal Position Sensor calibration has been programmed in the ECM.

8. Caution: Do not attempt to adjust screws or disassemble the APPS sensor. These settings are set at the factory and are not intended to be changed.

9. If the PCM has been replaced, do the following: (Otherwise go to step 12).

10. Note: If the Powertrain Control Module has been changed and the correct VIN and mileage have not been programmed, a DTC will be set in the ABS and Airbag modules.

11. For ABS and Airbag Systems: Enter correct VIN and Mileage in PCM. Erase ABS and Airbag modules codes.

12. If the PCM has not been replaced, do the following:

13. Connect the DRB to the PCM Data Link Connector and erase the codes.

14. Ensure no other speed control problems remain by doing the following: Road test the vehicle at a speed above 30 mph. Turn the speed control ON/OFF switch to the ON position.

15. Depress and release the SET switch. If the speed control did not engage, the repair is not complete.* Quickly depress and release the RESUME/ACCEL switch. If the vehicle speed did not increase by 2 mph, the repair is not complete.*

16. Press and hold COAST switch, vehicle speed should decrease. If no decrease, the repair is not complete.* Using caution, depress and release the brake pedal. If the speed control did not disengage, the repair is not complete.*

17. Bring the vehicle speed back up to 25 mph. Depress the RESUME/ACCEL switch. If the speed control did not resume the previously set speed, the repair is not complete.* Hold down SET switch. If vehicle did not decelerate, the repair is not complete.*

15. Ensure vehicle speed is greater than 30 mph and release SET switch. If vehicle did not adjust and set a new vehicle speed, repair is not complete.* Depress and release CANCEL switch. If the speed control did not disengage, the repair is not complete.*

19. Bring the vehicle back up to 35 mph and engage speed control. Turn the ON/OFF switch to the OFF position. If the speed control system is now functioning as designed. The repair is now complete.

20. If the vehicle successfully passed all of the previous tests, the speed control system is now functioning as designed. The repair is now complete.

21. * Check for Technical Service Bulletins that pertain to this speed control problem and then, if necessary, return to Symptom List.