B185A

B185A-31-DRIVER 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 looses its counts, it may perform erratically or in very short movements.

- When Monitored:
Whenever the module is awake.

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





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

Does the scan tool display: B185A-31-DRIVER 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. (Q301) DRIVER WINDOW HALL SENSOR A SIGNAL SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Driver Window Motor harness connector.
3. Disconnect the Driver Door Module C4 harness connector.
4. Measure the resistance between ground and the (Q301) Driver Window Hall Sensor A Signal circuit in the Driver Window Motor harness connector.

Is the resistance below 10,000 Ohms?

Yes

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

No

- Go To 3

3. (Q991) DRIVER WINDOW HALL SENSOR RETURN CIRCUIT OPEN




1. Measure the resistance of the (Q991) Driver Window Hall Sensor Return circuit between the Driver Door Module C4 harness connector and the Driver Window Motor harness connector.

Is the resistance above 2.0 Ohms?

Yes

- Repair the open in the (Q991) Driver Window Hall Sensor Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (Q301) DRIVER WINDOW HALL SENSOR A SIGNAL CIRCUIT OPEN




1. Measure the resistance of the (Q301) Driver Window Hall Sensor A Signal circuit between the Driver Door Module C4 harness connector and the Driver Window Motor harness connector.

Is the resistance above 2.0 Ohms?

Yes

- Repair the open in the (Q301) Driver Window Hall Sensor A Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 5

5. (Q301) DRIVER WINDOW HALL SENSOR A SIGNAL CIRCUIT SHORTED TO THE (Q991) DRIVER WINDOW HALL SENSOR RETURN CIRCUIT




1. Measure the resistance between the (Q301) Driver Window Hall Sensor A Signal circuit and the (Q991) Driver Window Hall Sensor Return circuit in the Driver Window Motor harness connector.

Is the resistance below 10,000 Ohms?

Yes

- Repair the (Q301) Driver Window Hall Sensor A Signal circuit for a short to the (Q991) Driver Window Hall Sensor Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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