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Driver Memory Mirror Inoperative

Possible Causes are:

  1. The following list of items should be checked before continuing with any power mirror tests. Ensure door ajar switches are working properly before proceeding. Ensure there is communication with the DDM, PDM and the BCM before proceeding. Ensure the mirror directional switches are working properly before proceeding. If not, replace the DDM. Ensure the mirror select switch is working properly before proceeding. If not, replace the DDM. Ensure both mirrors are operational from the DDM. If not, diagnose and repair mirrors first. See POWER MIRRORS - GRAND CHEROKEE article. If all items are operational, go to next step.
  2. Using the DRBIII(R), read the Drv Mirror Horiz Volts. Operate the mirror from left to right and observe the DRBIII(R). Does the voltage vary from approximately 1.0 to 4.0 volts? If yes, go to next step. If no, go to step  5 .
  3. Using the DRBIII(R), read the Drv Mirror Vert Volts. Operate the mirror from down to up and observe the DRBIII(R). Does the voltage vary from approximately 1.0 to 4.0 volts? If yes, go to next step. If no, go to step  5 .
  4. If there are no possible causes remaining, replace the Driver Door Module. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
  5. Disconnect the Driver Power Mirror connector. Disconnect the DDM C2 connector. Measure the resistance of the Mirror Sensor Ground wire between the Driver Power Mirror connector and the DDM C2 connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Mirror Sensor Ground wire. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
  6. Disconnect the Driver Power Mirror connector. Ensure the DDM C2 connector is connected at this time. Turn ignition off. Turn all lights off. Measure the resistance between ground and the Mirror Sensor Ground circuit in the Driver Power Mirror connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, replace the Driver Door Module. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
  7. Disconnect the Driver Power Mirror connector. Measure the voltage between Mirror Horizontal Position Signal circuit and ground. Is the voltage approximately 5 volts? If yes, go to next step. If no, go to step  10 .
  8. Disconnect the Driver Power Mirror connector. Measure the voltage between Mirror Vertical Position Signal circuit and ground. Is the voltage approximately 5 volts? If yes, go to next step. If no, go to step  10 .
  9. If there are no possible causes remaining, replace the Driver Power Mirror. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
  10. Disconnect the DDM C2 connector. Disconnect the Driver Power Mirror connector. Measure the resistance between the Mirror Sensor Ground circuit and the Mirror Vertical Position Signal circuit in the DDM C2 connector. Is the resistance less than 1000 ohms? If yes, repair the Mirror Sensor Ground wire for a short to the Mirror Vertical Position Signal wire. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
  11. Disconnect the DDM C2 connector. Disconnect the Driver Power Mirror connector. Measure the resistance between the Mirror Sensor Ground circuit and the Mirror Horizontal Position Signal circuit in the DDM C2 connector. Is the resistance less than 1000 ohms? If yes, repair the Mirror Sensor Ground wire for a short to the Mirror Horizontal Position Signal wire. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
  12. Disconnect the DDM C2 connector. Disconnect the Driver Power Mirror connector. Measure the resistance between ground and the Mirror Horizontal Position Signal circuit. Is the resistance less than 1000 ohms? If yes, repair the Mirror Horizontal Position Signal wire for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
  13. Disconnect the DDM C2 connector. Disconnect the Driver Power Mirror connector. Measure the resistance between ground and the Mirror Vertical Position Signal circuit. Is the resistance less than 1000 ohms? If yes, repair the Mirror Vertical Position Signal wire for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
  14. Disconnect the DDM C2 connector. Disconnect the Driver Power Mirror connector. Measure the resistance of the Mirror Horizontal Position Signal circuit between the DDM C2 connector and the Driver Power Mirror connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Mirror Horizontal Position Signal wire. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
  15. Disconnect the DDM C2 connector. Disconnect the Driver Power Mirror connector. Measure the resistance of the Mirror Vertical Position Signal circuit between the DDM C2 connector and the Driver Power Mirror connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Mirror Vertical Position Signal wire. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
  16. If there are no possible causes remaining, replace the Driver Door Module. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
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