Diagnostic Instructions
Circuit/System Description
This feature allows the operator to simultaneously retract both mirrors to a fully folded position. The driver door switch assembly (DDSA) contains the power folding mirrors switch and, each mirror contains an additional power folding mirror motor. The
DDSA sends a class 2 serial data message to the passenger door module (PDM) when the power folding mirror switch is activated to the retract or extend positions. When the PDM detects an active power folding mirror command from the DDSA, the PDM responds
by applying battery voltage and ground to the appropriate power folding mirror control circuits of both the driver and passenger power folding mirror motors in order to retract or extend both mirrors. When the switch is activated to unfold the mirrors, the PDM
reverses the polarity of the voltage and ground applied to the motors in order to move both mirrors to the fully extended position. For more detailed information concerning power mirror operation refer to
Outside Mirror Description and Operation
.
Reference Information
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Mirror Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
Power Folding Mirrors Malfunction -- All
- Ignition ON, verify with a scan tool the mirror fold switch parameter changes as the switch is activated. The scan tool should change between ACTIVE and INACTIVE.
⇒ | If the function does not perform as specified, replace the DDSA. |
- Ignition OFF, disconnect the C2 harness connector at the passenger outside rearview mirror.
- Ignition OFF, test for less than 1.0 ohm of resistance between the control circuit terminal F and ground.
⇒ | If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door module. |
- Ignition OFF, test for less than 1.0 ohm of resistance between the control circuit terminal E and ground.
⇒ | If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door module. |
- Connect a test lamp between control circuit terminal F and control circuit terminal E.
- Command the mirrors to the extend and retract positions with the power folding mirror switch. The test lamp should turn ON when commanding the EXTEND and RETRACT states.
⇒ | If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuit tests normal, replace the passenger door module. |
- If all circuits test normal, test or replace the passenger outside rearview mirror.
Power Folding Mirrors Malfunction -- Driver
- Ignition OFF, disconnect the F/MIR RETRACT relay and the F/MIR EXTEND relay.
- Test for less than 1.0 ohm of resistance between the ground circuit terminal E2 and ground.
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
- Test for less than 1.0 ohm of resistance between the ground circuit terminal F2 and ground.
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
- Verify that a test lamp illuminates between the B+ circuit terminal E5 and ground.
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
- Verify that a test lamp illuminates between the B+ circuit terminal F5 and ground.
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
- Connect a test lamp between control circuit terminal E1 and ground terminal E2.
- Command the driver mirror to the retract position with the power folding mirror switch. The test lamp should turn ON when commanding the RETRACT state.
⇒ | If the test lamp remains OFF during the command, test for a short to ground or an open/high resistance on the control circuit. |
- Connect a test lamp between control circuit terminal F1 and ground terminal F2.
- Command the driver mirror to the extend position with the power folding mirror switch. The test lamp should turn ON when commanding the EXTEND state.
⇒ | If the test lamp remains OFF during the command, test for a short to ground or an open/high resistance on the control circuit. |
- Connect the F/MIR RETRACT relay and the F/MIR EXTEND relay.
- Disconnect the C2 harness connector at the driver outside rearview mirror.
- Connect a test lamp between control circuit terminal F and control circuit terminal E.
- Command the driver mirror to the extend and retract positions with the power folding mirror switch. The test lamp should turn ON when commanding the EXTEND and RETRACT states.
⇒ | If the test lamp remains OFF during either of the commands, test for a short to ground or an open/high resistance on either control circuit. If the circuits test normal, replace the appropriate F/MIR relay. |
- If all circuits test normal, test or replace the driver outside rearview mirror.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.