B1960

DTC B1850, B1860, B1960, B2355, B2365, or B2375

CIRCUIT DESCRIPTION
The driver seat module (DSM) monitors the positions of most of the seat adjuster motors using hall effect type position sensors. The hall effect position sensors are supplied with battery positive reference and ground circuits from the DSM. The position sensor signal circuits are supplied battery positive voltage through a resistor then monitored within the DSM. During adjuster motor operation the hall effect position sensor provides a single pulse for every adjuster motor shaft rotation. The DSM counts the pulses from the position sensor signal circuits to determine the adjuster motor positions when storing or recalling memory seat position settings.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTCs:
- DTC B1850 Driver Seat Lumbar Position Sensor Circuit
- DTC B1960 Driver Seat Side Bolster Position Sensor Circuit
- DTC B2355 Driver Seat Front Vertical Position Sensor Circuit
- DTC B2365 Driver Seat Rear Vertical Position Sensor Circuit
- DTC B2375 Driver Seat Horizontal Position Sensor Circuit

CONDITIONS FOR RUNNING THE DTC
The system voltage must be between 9-16 volts.

CONDITIONS FOR SETTING THE DTC
The DSM does not detect position sensor movement during adjuster motor operation.

ACTION TAKEN WHEN THE DTC SETS
- The affected seat adjuster motor will operate approximately 1 revolution and stop each time the adjuster switch is activated.
- The memory recall functions for the seat motor with a current status DTC will be disabled.
- When the fault is no longer present a history status DTC will be stored, and memory operation will be restored.

CONDITIONS FOR CLEARING THE DTC
- The DTC will be current for as long as the fault is present.
- When the fault is no longer present the DTC will be a history status code.
- The history DTC will be cleared after 100 error free ignition cycles, or by using the scan tool clearing DTCs feature.

TEST DESCRIPTION

Step 1 - Step 12:

Step 13:

The numbers below refer to the step numbers on the diagnostic table.
3. During this test the DSM must see an active switch input before power will be supplied the position sensor.
4. During this test the DSM must see an active switch input before power will be supplied the position sensor.
5. During this test the DSM must see an active switch input before power will be supplied the position sensor.