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. |
DTC Descriptors
DTC B1722 01: Mirror Power Fold Circuit Short to BatteryDTC B1722 02: Mirror Power Fold Circuit Short to Ground
DTC B1722 04: Mirror Power Fold Circuit Open
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.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
An improper voltage level is seen on either the folding mirror motor retract control circuit or the folding mirror motor extend control circuit.
Action Taken When the DTC Sets
Power folding mirror operations are suspended as long as the fault is present.
Conditions for Clearing the DTC
| • | A current DTC will clear when the fault is no longer present. |
| • | A history DTC will clear after 40 malfunction-free ignition cycles. |
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 References
Control Module References for scan tool information.
Circuit/System Verification
Ignition ON, using the folding mirror switch, the left and right rearview mirrors should extend and retract as commanded.
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 5-40 ohms 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 |
