B1966

B1966-POWER LIFTGATE SENSOR SUPPLY HIGH





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

Does the scan tool display B1966-POWER LIFTGATE SENSOR SUPPLY HIGH?

Yes

- Go To 2

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (Q901) LOGIC GROUND OPEN




1. Turn the ignition off.
2. Disconnect the Power Liftgate Drive Unit connector.
3. Measure the resistance between the (Z800) Ground and the (Q901) Logic Ground circuit in the Power Liftgate Drive Unit connector.

Is the resistance below 9.5 Ohms?

Yes

- Go To 3

No

- Repair the (Q901) Logic Ground circuit for an open.
NOTE: The (Q901) Logic Ground circuit is grounded through the Power Liftgate Module and the (Z800) Ground circuit.

- Perform the BODY VERIFICATION TEST. Body Verification Test.

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




1. Turn the ignition on.
2. 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 5.0 Ohms?

Yes

- Replace the Power Liftgate Module.
- 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.