B1959

B1959-POWER LIFTGATE DRIVE CLUTCH CONTROL CIRCUIT HIGH





For a complete wiring diagram Consult Diagrams/Electrical

- 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 amps.





Diagnostic Test

1. DTC PRESENT
With the scan tool, record DTCs and any liftgate inhibitors.
Erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times.
With the scan tool, read 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 BODY VERIFICATION TEST - VER 1. Body Verification Test.

2. (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT SHORT TO VOLTAGE




Turn the ignition off.
Disconnect the Power Liftgate Module C1 harness connector.
Turn the ignition on.
Measure the voltage of the (Q201) Liftgate Clutch Driver circuit between the Power Liftgate 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 BODY VERIFICATION TEST - VER 1. Body Verification Test.

3. (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT OPEN




Disconnect the Power Liftgate Drive Unit harness connector
Measure the resistance of the (Q201) Liftgate Clutch Driver circuit between the Power Liftgate C1 harness connector and the Power Liftgate Drive Unit harness connector.
Is the resistance below 2.0 ohms?

Yes

- Go To 4

No

- Repair the (Q201) Liftgate Clutch Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

4. CHECK THE (Z800) GROUND CIRCUIT FOR AN OPEN




Measure the resistance between ground and the (Z800) Ground circuit in Power Liftgate Drive Unit connector.
Is the resistance below 2.0 ohms?

Yes

- Replace the Power Liftgate Drive Unit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Repair the (Z800) Ground circuit for an open. If the (Z800) Ground circuit is OK, replace the Power Liftgate Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.