Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Folding Mirror Motor Retract Control | B1722 02 | B1722 04 | B1722 01 | -- |
Folding Mirror Motor Extend Control | B1722 02 | B1722 04 | B1722 01 | -- |
Circuit/System Description
The Driver Door module (DDM) and Passenger Door Module (PDM) control the power folding or power extending functions of the outside rearview mirrors. The folding mirror motors are controlled by using bi-directional motor controls through the folding mirror motor retract control circuit and the folding mirror motor extend control circuit.
Reference Information
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Description and Operation
Outside Mirror Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Verification
- Ignition ON, observe the scan tool Mirror Fold Switch parameter while cycling the mirror fold switch between the extend and retract positions. The parameter should change between Idle, Extend, and Retract.
- Command the power folding mirrors to extend and retract using the mirror fold switch. Both mirrors should extend and retract as commanded.
| ⇒ | If the parameter does not cycle between the specified values, replace the DDM. |
Circuit/System Testing
- Ignition OFF, disconnect the X7 harness connector at the appropriate door module.
- Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground:
- Ignition OFF, test for infinite resistance between the following circuits and ground:
- Test for 5-15 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 2.
- If all circuits test normal, replace the door module.
| • | Control circuit terminal 1 |
| • | Control circuit terminal 2 |
| ⇒ | If the test lamp illuminates, test the appropriate circuit for a short to voltage. |
| • | Control circuit terminal 1 |
| • | Control circuit terminal 2 |
| ⇒ | If less than the specified value, test the appropriate circuit for a short to ground. If the circuits test normal, test or replace the rearview mirror. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for DDM or PDM replacement, setup, and programming |
