B1825

DTC B1825, B1850, B1860, B2355, B2365, or B2375

Circuit Description

The potentiometer type position sensor that sets this DTC is an internal part of the seat directional motor. It receives a 5-volt reference and low reference from the memory seat module (MSM). The sensor sends a voltage signal that is pulled up to voltage by the MSM. This voltage signal varies with the movement of the seat. Then based on this voltage signal, the MSM determines the position of the seat.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

* DTC B1825 Seat Recline Position Sensor Circuit
* DTC B1850 Seat Lumbar Horizontal Position Sensor Circuit
* DTC B1860 Seat Lumbar Vertical Position Sensor Circuit
* DTC B2355 Seat Front Vertical Position Sensor Circuit
* DTC B2365 Seat Rear Vertical Position Sensor Circuit
* DTC B2375 Seat Assembly Horizontal Position Sensor Circuit





Conditions for Running the DTC

The MSM must be powered and cannot have B1325 Battery Voltage Low as an active DTC for this DTC to set.

Conditions for Setting the DTC

If the MSM sees the voltage signal from this sensor as either lower than 0.25 volts or higher than 4.75 volts, the sensor will be considered out of range and the MSM will set this DTC.

Action Taken When the DTC Sets

The MSM disables all memory recall commands of the motor monitored by the sensor. The motor will respond to manual positioning commands.

Conditions for Clearing the DTC

The MSM will clear the DTC when it detects that the voltage from the sensor signal circuit is between 0.25 volts and 4.75 volts.

Diagnostic Aids

* The MSM is referenced in the Tech 2 as the driver position module (DPM) for this vehicle.
* All position sensors use common low reference and 5-volt reference circuits.
* If the 5-volt reference circuit is shorted to voltage multiple codes will set.
* If the 5-volt reference circuit is shorted to ground multiple codes will set.
* If the sensor low reference circuit is open multiple codes will set.

Test Description

Step 1 - Step 9:

Step 10 - Step 15:

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests for the proper operation of the circuit in the high voltage range.
4. This step tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.