B1953 - Rear Seat Up/Down Short to Ground

DTC B1953 - Rear Seat Up/Down Short To Ground

B1953-1 - 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 B1953-2.
NO System operating normally.

B1953-2 - Check For Additional DTCs

Are DTCs B1957 and B1965 also present?

YES GO to B1953-6.
NO GO to B1953-3.

B1953-3 - Test Potentiometer Input

- Using a voltmeter, carefully back probe rear up/down potentiometer input circuit 444 (LG/BK) on pin C3-9 of driver seat module connector for voltage.

Is voltage less than 0.5 volt?

YES GO to B1953-4.
NO REPLACE driver seat module. RETEST system

B1953-4 - Test Voltage

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

Is voltage reading 5 volts?

YES GO to B1953-5.
NO SERVICE circuit 446 (O/W) for open circuit. RETEST system.

B1953-5 - TEST Circuit 444 (LG/BK)

- Disconnect connector C3 from driver seat module.
- Using a ohmmeter, probe rear up/down potentiometer input circuit 444 (LG/BK) on pin C3-9 of driver seat module connector for continuity to ground.

Is there continuity?

YES SERVICE circuit 444 (LG/BK) for short to ground. RETEST system.
NO GO to B1953-7.

B1953-6 - Test Supply Voltage

- Disconnect connector from potentiometer.
- Using a voltmeter, carefully test driver seat module connector pin C3-1 7, circuit 446 (O/W) for voltage.

Is voltage reading 5 volts?

YES SERVICE circuit 446 (O/W) for short to ground for open circuit. RETEST system.
NO GO to B1953-8.

B1953-7 - Test For Open Circuit 446 (O/W)

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

Is there continuity?

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

B1953-8 - 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. REPLACE driver seat module.
NO REPLACE driver seat module