B1825

CIRCUIT DESCRIPTION
The seat recline motor is equipped with a potentiometer type position sensor used by the driver seat module to determine the position of the seat back. The motor position sensor is supplied with 5-volt reference and ground circuits from the driver seat module. The position sensor signal circuit is referenced from ground within the driver seat module. The signal voltage monitored by the driver seat module ranges from 0.39-4.58 volts and is determined by the wiper location on the resistor within the motor position sensor. The position sensor circuit voltage level is used by the driver seat module to determine the position of the seat back when storing or recalling memory position settings.

CONDITIONS FOR RUNNING THE DTC
The system voltage must be between 9.0-16.0 volts.

CONDITIONS FOR SETTING THE DTC
The recline motor position sensor signal circuit voltage level to the driver seat module is not within the 0.39-4.58 volt range.

ACTION TAKEN WHEN THE DTC SETS
The recline motor will not function during memory or exit position recall operation.

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.

DIAGNOSTIC AIDS
A short to voltage on a sensor signal circuit or an open ground may effect other sensors using common 5-volt reference and ground circuits causing the following DTCs to set:
- B2435
- B2440
- B3606

TEST DESCRIPTION

Steps 1-3:

Steps 4-8:

Steps 9-15:

The numbers below refer to the step numbers on the diagnostic table.
3. Tests for the proper operation of the signal circuit in the low voltage range.
4. Tests for the proper operation of the signal circuit in the high voltage range.
5. Tests for a short to voltage in the 5-volt reference circuit.