B1964-12

B1964-12-POWER LIFTGATE SENSOR SUPPLY - CIRCUIT SHORT TO BATTERY





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

- When Monitored:
Whenever the Power Liftgate Module is awake.

- Set Condition:
The Power Liftgate Module has detected the Position Sensor Supply voltage is above 5.5 volts.





1. DTC PRESENT
1. With the scan tool, record the DTCs and any liftgate inhibitors.
2. Erase the DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. Operate the liftgate several times.
5. With the scan tool, read the Active DTCs.

Does the scan tool display; B1964-12-POWER LIFTGATE SENSOR SUPPLY - CIRCUIT SHORT TO BATTERY?

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 poor pin fit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (Q901) LOGIC GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C2 harness connector.
3. Disconnect the Power Liftgate Drive Unit harness connector.
4. Measure the resistance of both of the (Q901) Logic Ground circuits between the Power Liftgate Module C2 harness connector and the Power Liftgate Drive Unit connector.

Is the resistance below 2.0 Ohms on both?

Yes

- Go To 3

No

- Repair the (Q901) Logic Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (Q203) POSITION SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE




1. Connect the Power Liftgate Module C2 harness connector.
2. Turn the ignition on.
3. Measure the voltage between the (Q901) Logic Ground circuit and the (Q203) Position Sensor Supply circuit in the Power Liftgate Drive Unit connector.

Is the voltage above 5.5 volts?

Yes

- Repair the (Q203) Position Sensor Supply circuit for a short to voltage. If the power liftgate is inoperative after repairing the (Q203) Position Sensor Supply circuit, replace the Power Liftgate Drive Unit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Measure the resistance of the (Q203) Position Sensor Supply circuit between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Power Liftgate Module. Power Liftgate Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (Q203) Position Sensor Supply circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.