B1605
DTC B1544, B1600, or B1605
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 Descriptor
DTC B1544 01
- Mirror Motors Common Circuit Short to Battery
DTC B1544 02
- Mirror Motors Common Circuit Short to Ground
DTC B1544 04
- Mirror Motors Common Circuit Open
DTC B1600 01
- Mirror Motor Vertical Circuit Short to Battery
DTC B1600 02
- Mirror Motor Vertical Circuit Short to Ground
DTC B1600 04
- Mirror Motor Vertical Circuit Open
DTC B1605 01
- Mirror Motor Horizontal Circuit Short to Battery
DTC B1605 02
- Mirror Motor Horizontal Circuit Short to Ground
DTC B1605 04
- Mirror Motor Horizontal Circuit Open
Diagnostic Fault Information
Circuit/System Description
The Driver Door Module (DDM) or Passenger Door Module (PDM) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. When the mirror is commanded up and down, voltage or ground is supplied to the mirror vertical motor through the mirror motor up/down control circuit and voltage or ground is supplied through the mirror motor common control circuit.
Horizontal controls operate in the same manner with the mirror motor left/right control circuit supplying voltage or ground and the mirror motor common control circuit suppling voltage or ground to the mirror horizontal motor when the mirror is commanded right and left.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
B1544
An improper voltage level is detected on the mirror motor common control circuit.
B1600
An improper voltage level is detected on the mirror motor vertical control circuit.
B1605
An improper voltage level is detected on the mirror motor horizontal control circuit.
Action Taken When the DTC Sets
Mirror movement is 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 Description and Operation (Heated Mirrors))Outside Mirror Description and Operation (Power Mirrors) (Outside Mirror Description and Operation (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 Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Command the left and right outside mirror to move up, down, left and right with a scan tool. The mirror should move in the commanded direction.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the appropriate outside rearview mirror.
2. Connect a test lamp between the control circuit terminal 9 and the control circuit terminal 10.
3. Ignition ON, command the mirror LEFT and RIGHT with a scan tool. The test lamp should turn ON when commanding the LEFT and RIGHT states.
• 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 circuits. If the circuits test normal, replace the door module.
4. Connect a test lamp between the control circuit terminal 11 and the control circuit terminal 10.
5. Ignition ON, command the mirror LEFT and RIGHT with a scan tool. The test lamp should turn ON when commanding the LEFT and RIGHT states.
• 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 circuits. If the circuits test normal, replace the door module.
6. If all circuits test normal, test or replace the outside rearview mirror motor.
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