B1D1C(DDM), B1D28(PDM) - MIRROR MOTOR COMMON CONTROL CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W.

When Monitored:
When the Mirror Common Driver Output is turned on.
Set Condition:
DTC B1D1C – If the Driver Door Module senses voltage on the (P73) Driver Mirror Common Driver circuit within 10 ms of turning on the Mirror Common Driver Output.
DTC B1D28 – If the Passenger Door Module senses voltage on the (P70) Passenger Mirror Common Driver circuit within 10 ms of turning on the Mirror Common Driver Output.

Possible Causes

FOR THE DRIVER MEMORY MIRROR SYSTEM:

(P73) DRIVER MIRROR COMMON DRIVER CIRCUIT SHORTED TO VOLTAGE

DRIVER OUTSIDE REARVIEW MIRROR SHORTED

DRIVER DOOR MODULE

FOR THE PASSENGER MEMORY MIRROR SYSTEM:

(P70) PASSENGER MIRROR COMMON DRIVER CIRCUIT SHORTED TO VOLTAGE

PASSENGER OUTSIDE REARVIEW MIRROR SHORTED

PASSENGER DOOR MODULE

NOTE: This procedure addresses the Driver Memory Mirror system's circuits and components and the Passenger Memory Mirror system's circuits and components. Select only that which applies to the system you are diagnosing.

Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

Turn the ignition on.
With the scan tool, record and erase DTCs.
Operate the Mirror Switch in all directions several times.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTCs.

Does the scan tool display: B1D1C or B1D28 MIRROR MOTOR COMMON CONTROL CIRCUIT HIGH?

Yes

Go To 2

The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

2. TEST FOR A SHORTED OUTSIDE REARVIEW MIRROR

For the Driver Memory Mirror System, proceed as follows:

Turn the ignition off.
Disconnect the Driver Outside Rearview Mirror connector.
Turn the ignition on.
With the scan tool, erase DTCs.
Operate the Mirror Switch in all directions several times.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTCs.

For the Passenger Memory Mirror System, proceed as follows:

Turn the ignition off.
Disconnect the Passenger Outside Rearview Mirror connector.
Turn the ignition on.
With the scan tool, erase DTCs.
Operate the Mirror Switch in all directions several times.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTCs.

Does the scan tool display: B1D1C or B1D28 MIRROR MOTOR COMMON CONTROL CIRCUIT HIGH?

Yes

Go To 3

Replace the Outside Rearview Mirror in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

3. CHECK THE (P73) DRIVER MIRROR COMMON DRIVER CIRCUIT OR THE (P70) PASSENGER MIRROR COMMON DRIVER CIRCUIT FOR A SHORT TO VOLTAGE

For the Driver Memory Mirror System, proceed as follows:

Measure the voltage of the (P73) Driver Mirror Common Driver circuit.

For the Passenger Memory Mirror System, proceed as follows:

Measure the voltage of the (P70) Passenger Mirror Common Driver circuit.

Is the voltage above 0.2 volts?

Yes, Driver Mirror

Repair the (P73) Driver Mirror Common Driver circuit for a short to voltage.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Yes, Passenger Mirror

Repair the (P70) Passenger Mirror Common Driver circuit for a short to voltage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

No, Driver Mirror

Replace the Driver Door Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

No, Passenger Mirror

Replace the Passenger Door Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).