B1743 - Passenger Mirror Vertical Switch Short to Battery

DTC B1743 - Passenger Mirror Vertical Switch Short To Battery

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.

B1743-1 - Make Sure Switches Are Not Pressed

- 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.
- Make sure that driver and passenger mirror switches are not pressed. Clear DTCs.
- Rerun self-test diagnostics. Be sure that no switches are pressed during test.

Is DTC B1743 still present?

YES GO to B1743-3.
NO GO to B1743-2.

B1743-2 - Make Sure Switches Are Not Sticking

- Make sure ignition remains OFF.
- Set Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent to read PID PMIR_V.
- Press the driver mirror switch in the up position several times and observe the display.

Does PID show the button releases within 1 second when the switch is released?

YES System operating normally. Continuous DTC would be set if mirror switch held for more than 2 minutes.
NO REPLACE mirror switch. RESTORE vehicle. RETEST system.

B1743-3 - Test Mirror Switch

- Disconnect mirror switch. Make sure that all other connections are still intact.
- Clear DTCs.
- Rerun self-test diagnostics.

Is DTC B1743 still present?

YES GO to B1743-4.
NO REPLACE mirror switch. RESTORE vehicle. RETEST system.

B1743-4 - Check Circuit 943 (P/O)

- Disconnect driver seat module connector C1.
- Using a voltmeter connected to a known good ground, test pin C1-4, circuit 943 (P/O) for voltage.

Is battery positive voltage (B+) present?

YES SERVICE circuit 943 (P/O) for short to B+. RESTORE vehicle. RETEST system.
NO REPLACE driver seat module. RESTORE vehicle. RETEST system.