B1722

DTC B1722

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptors
DTC B1722 01
- Mirror Power Fold Circuit Short to Battery

DTC B1722 02
- Mirror Power Fold Circuit Short to Ground

DTC B1722 04
- Mirror Power Fold Circuit Open

Diagnostic Fault Information





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 fault free ignition cycles.

Reference Information
Schematic Reference

Outside Rearview Mirror Schematics (Outside Rearview Mirror Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Outside Mirror Description and Operation (Heated Mirrors) (Outside Mirror (Heated Mirrors))Outside Mirror Description and Operation (Power Mirrors) (Outside Mirror (Power Mirrors))
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool References

Control Module References (Programming and Relearning) 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

1. Ignition OFF, disconnect the X7 harness connector at the appropriate door module.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground:

* Control circuit terminal 1
* Control circuit terminal 2

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

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

* 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.

4. Test for 5-15 ohms between the control circuit terminal 1 and the control circuit terminal 2.

• 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.

5. If all circuits test normal, replace the appropriate door module.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Outside Rearview Mirror Motor Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for DDM or PDM replacement, setup, and programming