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Powertrain Verification Test VER-4

NOTE: If Powertrain Control Module (PCM) has been replaced and correct Vehicle Identification Number (VIN) and mileage have not been programmed, a Diagnostic Trouble Code (DTC) will be set in Anti-Lock Brake System (ABS) and air bag modules. If vehicle is equipped with a Sentry Key Immobilizer Module (SKIM), sentry key data must be updated to enable starting. For additional information, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
  1. Inspect vehicle to ensure all engine and speed control system components are connected. Reassemble and reconnect components as necessary. Using scan tool, erase DTCs from PCM.
  2. If PCM has not been replaced, go to step  4. If PCM has been replaced and correct VIN and mileage has not been entered, DTCs will set in ABS and air bag modules.
  3. For ABS and air bag modules, enter correct VIN and mileage and erase DTCs. If vehicle is equipped with SKIM, secret key data must be updated. Using scan tool, select theft alarm, SKIM, MISC and place SKIM in secured access mode by entering 4-digit PIN. Select update secret key data to transfer data from SKIM to new PCM.
  4. Road test vehicle at a speed more than 35 MPH. Turn S/C ON/OFF switch on. CRUISE indicator should illuminate. Press and release SET button. If S/C does not engage, repair is not complete. Check for related Technical Service Bulletins (TSBs) and return to TROUBLE SHOOTING , if necessary. If speed control engages, go to next step
  5. Depress and hold RESUME/ACCEL switch. If vehicle speed increases by 2 MPH, go to next step. If vehicle speed does not increase by 2 MPH, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  6. Press and hold COAST switch. If vehicle speed decreases, go to next step. Vehicle speed should decrease. If vehicle speed does not decrease, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  7. Using caution, depress and release brake pedal. If S/C disengages, go to next step. If S/C does not disengage, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  8. Bring vehicle speed to 35 MPH. Depress speed control RESUME/ACCEL switch. If vehicle resumes to previously set speed, go to next step. If vehicle does not resume to previously set speed, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  9. Hold down SET switch. If vehicle speed decreases, go to next step. If vehicle speed does not decrease, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  10. Ensure vehicle speed is more than 35 MPH and release SET switch. If S/C sets at a new speed, go to next step. If S/C does not set at a new speed, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  11. Depress and release CANCEL switch. If S/C disengages, go to next step. If S/C does not disengage, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  12. Ensure vehicle speed is more than 35 MPH. Engage speed control. Turn S/C ON/OFF switch to OFF position. If speed control disengages, system is operating correctly. Repair is complete. If S/C has been repaired for an overshoot/undershoot symptom, go to next step. If speed control does not disengage, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
  13. If operator repeatedly uses SET switch to control vehicle speed without pressing on accelerator pedal, this is referred to as "Lift Foot Set". Vehicle may overshoot or undershoot desired set speed by 5 MPH. Speed Control (S/C) system has an adaptive learning strategy to compensate for overshoot/undershoot conditions.
  14. To unlearn overshoot/undershoot condition, drive vehicle while maintaining a steady speed using accelerator pedal. Turn S/C on. Press and release SET switch. After 10 seconds, turn S/C off using OFF or CANCEL switch.
  15. Repeat procedure 10-15 times to completely unlearn overshoot/undershoot condition. Recheck condition of Speed Control (S/C). If S/C operates properly, repair is complete. If speed control does not operate properly, repair is not complete. Check for related TSBs and return to TROUBLE SHOOTING , if necessary.
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