B1959

B1959-POWER LIFTGATE DRIVE CLUTCH CONTROL CIRCUIT HIGH





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

- When Monitored:
Whenever the Power Liftgate is power opening or closing.

- Set Condition:
The power liftgate module has detected the clutch driver circuit current is under 0.5 of an amp.





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 DTCs.

Does the scan tool display B1959-POWER LIFTGATE DRIVE CLUTCH CONTROL CIRCUIT 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. (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (Q201) Liftgate Clutch Driver circuit between the PLG C1 harness connector and ground.

Is there any voltage present?

No

- Go To 3

Yes

- Repair the (Q201) Liftgate Clutch Driver circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. POWER LIFTGATE MODULE




1. Turn the ignition off.
2. Measure the resistance between ground and the (Q201) Liftgate Clutch Driver circuit.

Is the resistance approximately 8.0 Ohms?

Yes

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

No

- Go To 4

4. (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT OPEN




1. Disconnect the Power Liftgate Drive Unit harness connector
2. Measure the resistance of the (Q201) Liftgate Clutch Driver circuit between the PLG C1 harness connector and Drive Unit harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 5

No

- Repair the (Q201) Liftgate Clutch Driver circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (Z918) GROUND OPEN




1. Turn all lights off.
2. Measure the resistance between ground and the (Z918) Ground circuit in Drive Unit connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Drive Unit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (Z918) Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.