Diagnostic Routine C
Diagnostic Routine C
Diagnostic Overview
A Single Mirror Does Not Operate Correctly
Refer to Wiring Diagram Set 124 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
The DDM (Driver Door Module) supplies voltage and ground to control the LH (Left Hand) exterior mirror motor movement and the PDM (Passenger Door Module) supplies voltage and ground to control the RH (Right Hand) exterior mirror motor movement. The DDM (Driver Door Module) and PDM (Passenger Door Module) control glass movement by reversing polarity of the voltage and ground circuits being supplied to each motor.
DTC Fault Trigger Conditions
Visual Inspection and Diagnostic Pre-checks
- Inspect the exterior mirror control switch.
- Inspect the exterior mirror.
Pinpoint Test
1. CHECK DDM (Driver Door Module) OR PDM (Passenger Door Module) DTCs (Diagnostic Trouble Codes)
1. Ignition ON.
2. Using a scan tool, perform the DDM (Driver Door Module) or PDM (Passenger Door Module) self-test.
Is DDM (Driver Door Module) DTC (Diagnostic Trouble Code) B1C09:11, B1C10:11 or PDM (Passenger Door Module) DTC (Diagnostic Trouble Code) B1C11:11, B1C12:11 present?
2. CHECK THE MIRROR COMMANDED DIRECTION OF TRAVEL (Mirror_CTRL) DDM (Driver Door Module) PID (Parameter Identification)
1. Ignition ON.
2. Using a scan tool, monitor the Mirror_CTRL DDM (Driver Door Module) PID (Parameter Identification).
3. Operate the exterior mirror switch right, left, up and down positions.
Does the Mirror_CTRL DDM (Driver Door Module) PID (Parameter Identification) match in all switch positions?
3. CHECK THE LH (Left Hand) MIRROR CONTROL CIRCUITS FOR VOLTAGE
1. Ignition OFF.
2. Disconnect: LH (Left Hand) Exterior Mirror.
3. Ignition ON.
4. Select the LH (Left Hand) exterior mirror on the exterior mirror control switch.
5. While operating the exterior mirror control switch in the right, left, up and down positions, measure:
Is voltage present in the right and up positions and no voltage in the left and down positions?
4. CHECK THE LH (Left Hand) MIRROR CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
1. Ignition OFF.
2. Disconnect: DDM (Driver Door Module) C501B.
3. Ignition ON.
4. Measure:
Are any voltages present?
5. CHECK THE LH (Left Hand) MIRROR CONTROL CIRCUITS FOR A SHORT TO GROUND
1. Ignition OFF.
2. Measure:
Are the resistances greater than 10,000 ohms?
6. CHECK THE LH (Left Hand) MIRROR CONTROL CIRCUITS FOR AN OPEN
1. Measure:
Are the resistances less than 3 ohms?
7. CHECK THE RH (Right Hand) MIRROR CONTROL CIRCUITS FOR VOLTAGE
1. Ignition OFF.
2. Disconnect: RH (Right Hand) Exterior Mirror.
3. Ignition ON.
4. Select the RH (Right Hand) exterior mirror on the exterior mirror control switch.
5. While operating the exterior mirror control switch in the right, left, up and down directions, measure:
Is voltage present in the right and up positions and no voltage in the left and down positions?
8. CHECK THE RH (Right Hand) MIRROR CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
1. Ignition OFF.
2. Disconnect: Passenger Door Module C652B.
3. Ignition ON.
4. Measure:
Are any voltages present?
9. CHECK THE RH (Right Hand) MIRROR CONTROL CIRCUITS FOR A SHORT TO GROUND
1. Ignition OFF.
2. Measure:
Are the resistances greater than 10,000 ohms?
10. CHECK THE RH (Right Hand) MIRROR CONTROL CIRCUITS FOR AN OPEN
1. Measure:
Are the resistances less than 3 ohms?
11. CHECK FOR CORRECT DDM (Driver Door Module) OPERATION
1. Disconnect and inspect all DDM (Driver Door Module) connectors.
2. Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out-pins - install new pins as necessary
3. Reconnect the DDM (Driver Door Module) connectors and all previously disconnected exterior system connectors. Make sure they seat and latch correctly.
4. Operate the system and determine if the concern is still present.
Is the concern still present?
12. CHECK FOR CORRECT PDM (Passenger Door Module) OPERATION
1. Inspect the PDM (Passenger Door Module) connectors.
2. Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out-pins - install new pins as necessary
3. Reconnect: the PDM (Passenger Door Module) connectors and all previously disconnected exterior system connectors. Make sure they seat and latch correctly.
4. Operate the system and determine if the concern is still present.
Is the concern still present?
