Passenger Door Module (PDM, DMFL/R)

B25B0-31-WINDOW POSITION SENSOR-NO SIGNAL

For a complete wiring diagram, refer to the Wiring Information.





Theory of Operation

The window motor contains a hall effect sensor to detect the window position. A hall effect sensor is a transducer that varies its output voltage in response to changes in magnetic field. If the motor loses its counts, it may perform erratically or in very short movements.

- When Monitored:
Whenever the module is awake.

- Set Condition:
When the window motor hall sensor does not generate a signal during a window movement.





Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Operate the Passenger Window up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read the DTCs.

Does the scan tool display; B25B0-31-WINDOW POSITION SENSOR - NO SIGNAL?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

2. (Q306) PASSENGER WINDOW HALL SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Passenger Door Module C4 harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (Q306) Passenger Window Hall Sensor Supply circuit.

Is there any voltage present?

Yes

- Repair the short to voltage in the (Q306) Passenger Window Hall Sensor Supply circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 3

3. (Q302) PASSENGER WINDOW HALL SENSOR A SIGNAL SHORTED TO GROUND
1.
2. Turn the ignition off.
3. Disconnect the Passenger Window Motor harness connector.
4. Measure the resistance between ground and the (Q302) Passenger Window Hall Sensor A Signal circuit in the Passenger Window Motor harness connector.

Is the resistance below 10K Ohms?

Yes

- Repair the short to ground in the Passenger Window Hall Sensor A signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 4

4. (Q306) PASSENGER WINDOW HALL SENSOR SUPPLY CIRCUIT OPEN
1.
2. Measure the resistance of the (Q306) Passenger Window Hall Sensor Supply circuit between the Passenger Door Module C4 harness connector and the Passenger Window Motor harness connector.

Is the resistance above 2.0 Ohms?

Yes

- Repair the open in the (Q306) Passenger Window Hall Sensor Supply circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 5

5. (Q990) PASSENGER WINDOW HALL SENSOR RETURN CIRCUIT OPEN
1.
2. Measure the resistance of the (Q990) Passenger Window Hall Sensor Return circuit between the Passenger Door Module C4 harness connector and the Passenger Window Motor harness connector.

Is the resistance above 2.0 Ohms?

Yes

- Repair the open in the (Q990) Passenger Window Hall Sensor Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 6

6. (Q302) DRIVER WINDOW HALL SENSOR A SIGNAL CIRCUIT OPEN
1.
2. Measure the resistance of the (Q302) Passenger Window Hall Sensor A Signal circuit between the Passenger Door Module C4 harness connector and the Passenger Window Motor harness connector.

Is the resistance above 2.0 Ohms?

Yes

- Repair the open in the (Q302) Passenger Window Hall Sensor A Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 7

7. (Q302) PASSENGER WINDOW HALL SENSOR A SIGNAL CIRCUIT SHORTED TO THE (Q990) PASSENGER WINDOW HALL SENSOR RETURN CIRCUIT
1.
2. Measure the resistance between the (Q302) Passenger Window Hall Sensor A Signal circuit and the (Q990) Passenger Window Hall Sensor Return circuit in the Passenger Window Motor harness connector.

Is the resistance below 10K Ohms?

Yes

- Repair the (Q302) Passenger Window Hall Sensor A Signal circuit for a short to the (Q990) Passenger Window Hall Sensor Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Replace the Window Motor. Window Regulator.
- Perform the BODY VERIFICATION TEST. Body Verification Test .