B1957 - Front Tilt Pot Feedback Circuit Short to Ground

DTC B1957 - Front Tilt Pot Feedback Circuit Short To Ground

B1957-1 - Rerun Self-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 all circuits under seat. Make sure all potentiometers are connected.
- Clear DTCs.
- Rerun self-test.

Is DTC B1953 still present?

YES GO to B1957-2.
NO System operating normally.

B1957-2 - Check For Additional DTCs

Are DTCs B1957 and B1965 also present?

YES GO to B1957-6.
NO GO to B1957-3.


B1957-3 Test Potentiometer Input

- Using a voltmeter, back probe front up/down potentiometer input circuit 443 (LG/R) on pin C3-15 of driver seat module connector for voltage.

Is voltage less than 0.5 volt?

YES GO to B1957-4.
NO REPLACE driver seat module. RETEST system.

B1957-4 - Test Voltage

- Disconnect connector from potentiometer. Test circuit 446 (O/W) for voltage.

Is voltage reading 5 volts?

YES GO to B1957-5.
NO SERVICE circuit 446 (O/W) for open circuit

B1957-5 - Test Circuit

- Disconnect connector C3 from driver seat module
- Using a ohmmeter, probe front up/down potentiometer input circuit 443 (LG/R) on pin C3-15 of driver seat module connector for continuity to ground

Is there continuity?

YES SERVICE circuit 443 (LG/R) for short to ground. RETEST system.
NO GO to B1957-7.

B1957-6 - Test Supply Voltage

- Disconnect connector from potentiometer.
- Using a voltmeter, test circuit 446 (O/W) for voltage.

Is voltage reading 5 volts?

YES SERVICE circuit 446 (O/W) for short to ground or open circuit. RETEST system.
NO G0 to B1957-8.

B1957-7 - Test For Open Circuit 446 (O/W)

- Using an ohmmeter, test circuit 446 (O/W) from potentiometer to driver seat module connector pin C3-17 for continuity.

Is there continuity?

YES REPLACE potentiometer. RETEST system.
NO SERVICE circuit 446 (O/W) for open circuit.

B1957-8 - Test For Shorted Potentiometer Feed

- Disconnect connector C3 from driver seat module.
- Using a voltmeter, carefully check driver seat module connector C3-17, circuit 446 (O/W) for voltage.

Is voltage reading 5 volts?

YES SERVICE circuit 446 (O/W) for short to ground or open circuit. RETEST system.
NO REPLACE driver seat module.