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Road Test Verification

  1. Inspect the vehicle to ensure that all engine components are properly installed and connected. Reassemble and reconnect components as necessary.
  2. If this verification procedure is being performed after a non-DTC test, perform steps  3 and  4 .
  3. Check to see if the initial symptom still exists. If there are no trouble codes and the symptom no longer exists, the repair was successful and testing is now complete.
  4. If the initial or another symptom exists, the repair is not complete. Check all pertinent Technical Service Bulletins (TSBs) and return to the Symptom List if necessary
  5. For previously read DTCs that have not been dealt with, return to the Symptom List and follow the diagnostic path for that DTC; otherwise, continue.
  6. If the Engine Control Module (ECM) has not been changed, perform steps  7 and  8 . If the Engine Control Module (ECM) has been changed, go to step  9 .
  7. Using the DRBIII(R), erase all diagnostic trouble codes (DTCs), then disconnect the DRBIII(R).
  8. Turn ignition off for at least 10 seconds.
  9. If equipped with a Transfer Case Position Switch, perform step  10 , otherwise, continue with step  11 .
  10. With the ignition switch on, place the Transfer Case Shift Lever in each gear position, stopping for 15 seconds in each position.
  11. Ensure no DTCs remain by performing steps  12 through  15 .
  12. Road test the vehicle. For some of the road test, go at least 40 MPH (64 KMH). If this test is for an A/C Relay Control Circuit, drive the vehicle for at least 5 minutes with the A/C on.
  13. At some point, stop the vehicle and turn the engine off for at least 10 seconds, then restart the engine and continue.
  14. Upon completion of the road test, turn the engine off and check for DTCs with the DRBIII(R).
  15. If the repaired DTC has reset, the repair is not complete. Check for any pertinent Technical Service Bulletins (TSBs) and return to the Symptom. If there are no DTCs, the repair was successful and is now complete. Are any DTCs or symptoms remaining? If yes, repair is not complete. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  or SYMPTOM IDENTIFICATION  tables under RETRIEVING & CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. If no, repair is complete.
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