The driver door module (DDM) or passenger door module (PDM) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. When the mirror is commanded up, voltage is supplied to the mirror vertical motor through the driver/passenger mirror motor right/down motors common circuit and ground is supplied through the driver/passenger mirror motor down control circuit. When the mirror is commanded down, voltage is supplied to the mirror vertical motor through the driver/passenger mirror motor down control circuit and ground is supplied through the driver/passenger mirror motor right/down motors common circuit.

Horizontal controls operate in the same manner with the driver/passenger mirror motor right/down motors common circuit supplying voltage and the driver/passenger mirror motor right control circuit supply a ground to the mirror horizontal motor when the mirror is commanded right. When the mirror is commanded left, voltage is supplied to the mirror horizontal motor through the driver/passenger mirror motor right control circuit and ground is supplied through the driver/passenger mirror motor right/down motors common circuit.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, command the driver and passenger outside mirror to move up, down, left and right using the mirror directional switch. The mirrors should move in the commanded direction.

Mirror Motor Circuit Test

1. Ignition OFF, disconnect the X3 harness connector at the appropriate door module.
2. Ignition ON, verify a test lamp does not illuminate between the supply voltage circuit terminal B7 and ground.

•	Control circuit terminal B4

•	Control circuit terminal B2

•	Control circuit terminal B6

⇒	If the test lamp illuminates, test the appropriate control circuit for a short to voltage.

3. Ignition OFF, test for infinite resistance between the following control circuits and ground:

•	Control circuit terminal B4

•	Control circuit terminal B2

•	Control circuit terminal B6

⇒	If less the specified value, test the appropriate control circuit for a short to ground.

4. Test for 40-100 ohms between the control circuit terminal B4 and the control circuit terminal B6.

⇒	If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.

5. Test for 40-100 ohms between the control circuit terminal B2 and the control circuit terminal B6.

⇒	If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.

6. If all circuits test normal, replace the door module.

Power Mirror Switch Component Test

1. Ignition OFF, disconnect the X5 harness connector at the DDM.
2. Test for infinite resistance between the ignition circuit terminal 15 and the listed signal circuit terminals with the switch in the open position.

•	Right signal terminal 10

•	Left signal terminal 11

•	Down signal terminal 12

•	Up signal terminal 13

⇒	If not the specified value, replace the power mirror switch.

3. Test for less than 2.0 ohms between the ignition circuit terminal 15 and the listed signal circuit terminals with the switch in the appropriate closed position.

•	Right signal terminal 10

•	Left signal terminal 11

•	Down signal terminal 12

•	Up signal terminal 13

⇒	If greater than the specified range, replace the power mirror switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.