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 B1600: Mirror Motor 1 CircuitDTC B1605: Mirror Motor 2 Circuit
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Left/Right Mirror Motor Down Control | B1600 | 1 | B1600 | -- |
Left/Right Mirror Motor Up Control | B1600 | 1 | B1600 | -- |
Left/Right Mirror Motor Left Control | B1605 | 1 | B1605 | -- |
Left/Right Mirror Motor Right Control | B1605 | 1 | B1605 | -- |
1. Power Mirror Malfunction | ||||
Circuit/System Description
The driver door module (DDM) and passenger door module (PDM) each provide motor control output functions for their respective mirrors. These output controls allow each door module to command their respective power mirrors in horizontal and vertical positions. The driver door switch (DDS) sends a serial data message to the door modules when the mirror switch is activated to the up, down, left or right positions. When the door modules detect an active mirror command from the DDS, they will command the respective mirror motor in the appropriate direction. Each door module commands their respective mirror motors by applying a ground or voltage to the control circuit.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
B1600
The DDM or PDM detects a short to ground or voltage in the mirror vertical motor control circuit.
B1605
The DDM or PDM detects a short to ground or voltage in the mirror horizontal motor control circuit.
Actions Taken When the DTC Sets
| • | When DTC B1600 is present, the vertical mirror control will be disabled. |
| • | When DTC B1605 is present, the horizontal mirror control will be disabled. |
Conditions for Clearing the DTC
| • | A current DTC will clear when the fault is no longer present. |
| • | A history DTC will clear after 50 fault-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 Reference
Control Module References for scan tool information
Circuit/System Verification
Using the mirror directional switch operate the left and right outside mirrors up, down, left and right. The mirrors should move in the commanded directions.
Circuit/System Testing
- Ignition OFF, disconnect the X1 harness connector at the appropriate outside rearview mirror.
- Connect a test lamp between mirror motor UP control circuit terminal A and mirror motor DOWN control circuit terminal C.
- Command the mirror to the UP and DOWN positions with a scan tool. The test lamp should turn ON when commanding the Up and DOWN states.
- Connect a test lamp between mirror motor LEFT control circuit terminal H and mirror motor RIGHT control circuit terminal F.
- Command the mirror to the LEFT and RIGHT positions with a scan tool. The test lamp should turn ON when commanding the LEFT and RIGHT states.
- If all circuits test normal, test or replace the outside rearview mirror motor.
| ⇒ | If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on either control circuit. If the circuit tests normal, replace the door module. |
| ⇒ | If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on either control circuit. If the circuit tests normal, replace the door module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for DDM or PDM replacement, setup, and programming |
