B1670 - Passenger Mirror Right/Left Circuit Output Failure

DTC B1670 - Passenger's Mirror Right/Left Circuit Output Failure

NOTE: Ford DOES NOT provide a procedure to perform the following pinpoint test without the Rotunda New Generation Star (NGS) tester 007-00500 or equivalent.

B1670-1 - Rerun Test

- Turn ignition switch to RUN.
- Turn ignition switch OFF. These two steps "wake up" the driver seat module.
- Open driver side door. This disables delay accessory function.

NOTE: Seat will move a short distance in each direction during self-test.

- Execute self-test.
- Inspect passenger mirror and make sure that there are no obstructions.
- Rerun self-test diagnostic.

Is DTC B1670 still present?

YES GO to B1670-2.
NO System operating normally.

B1670-2 - Test Passenger Mirror Horizontal Outputs

- Make sure ignition remains OFF.
- Connect Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent to data link connector.
- Enter Diagnostic Data Link.
- Enter Driver Seat Module.
- Enter Active Command Modes.
- Select Power Mirror.
- Command Passenger Mirror Left.
- Command Passenger Mirror Right. Note motion of mirror.
- Command Passenger Mirror Left. Note motion of mirror.

Does mirror move during last two movements?

YES GO to B1670-3 to service potentiometer.
NO SERVICE circuits 543 (DG) and 952 (W/LG) for open circuit or short to ground or B+. TEST mirror for motor and mechanical operation. If all check out OK and mirror still does not operate, REPLACE driver seat module. RESTORE vehicle. RETEST system.

B1670-3 - Test Potentiometer Circuit 958 (GY/R) For Open

- Using a voltmeter connected to a know good ground, probe back of connector C2 of driver seat module and read voltage at potentiometer input:

Passenger's Vertical: pin C2-17, circuit 957 (P/W)
Passenger's Horizontal: pin C2-18, circuit 954 (DG/W)

Is voltage reading less than 0.5 volt on both circuits?

YES SERVICE circuit 958 (GY/R) for open circuit to passenger mirror. RESTORE vehicle. RETEST system.
NO GO to B1670-4.

B1670-4 - Test Potentiometer Circuit 954 (DG/W) For Open

- Using a voltmeter connected to a know good ground, probe back of connector C2 of driver seat module and read voltage at potentiometer input:

Passenger's Horizontal: pin C2-1 8, circuit 954 (DG/W)

Is voltage reading less than 0.5 volt?

YES SERVICE circuit 954 (DG/W) for open circuit or damaged potentiometer. RESTORE vehicle. RETEST system.
NO GO to B1670-5.

B1670-5 - Test Potentiometer Mirror Circuit

- Using a voltmeter connected to a know good ground, probe back of connector C2 of driver seat module and read voltage at potentiometer input:

Passenger's Horizontal: pin C2-18, circuit 954 (DG/W)

Is voltage reading 0.5 - 4.5 volts?

YES REPLACE mirror. RESTORE vehicle. RETEST system.
NO GO to B1670-6.

B1670-6 - Test Potentiometer Circuit 955 (G/Y) For Open

- Using a voltmeter connected to a know good ground, probe back of connector C2 of driver seat module and read voltage at potentiometer inputs for motion which did not work:

Passenger's Vertical: pin C2-17, circuit 957 (P/W)
Passenger's Horizontal: pin C2-1 8, circuit 954 (DG/W)

Is voltage reading 4.5 - 5 volts on both circuits?

YES SERVICE circuit 955 (G/Y) for open circuit to passenger mirror. RESTORE vehicle. RETEST system.
NO REPLACE driver seat module. RESTORE vehicle. RETEST system.