B1967

B1967-POWER LIFTGATE OPEN DIRECTION OVERCURRENT





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

- When Monitored:
Anytime the Power Liftgate is in a power open operation.

- Set Condition:
The drive motor stall current of over 24 amps has been detected for over 500 ms. during the power opening operation.





1. DTC PRESENT
1. With the scan tool, record and erase DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. Operate the power liftgate several times if possible.
4. With the scan tool, read DTCs.

Does the scan tool display B1967-POWER LIFTGATE OPEN DIRECTION OVERCURRENT?

Yes

- Go To 2

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding conditions.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. BINDING LIFTGATE
1. Examine the liftgate for proper alignment, worn or binding hinges, weak liftgate prop assembly, or loose/hard weatherstrip for wear or anything that would cause an obstruction to proper operation. Check for the possibility of the liftgate having been overloaded due to ice or heavy snow.
2. Raise the liftgate and check the struts for proper operation.
3. If necessary manually operate the liftgate of a known good vehicle and notice the effort needed.
4. Compare the effort needed on the disabled vehicle.

Were there any mechanical problems found?

Yes

- Refer to Service information for the related symptom(s).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. (Q89) LIFTGATE CLOSE DRIVER CIRCUIT SHORTED TO VOLTAGE




1. Disconnect the Power Liftgate Module C1 connector.
2. Measure the voltage between the (Q89) Liftgate Close Driver circuit and ground.

Is there any voltage present?

Yes

- Repair the (Q89) Liftgate Close Driver circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO THE (Q89) LIFTGATE CLOSE DRIVER CIRCUIT




1. Turn the ignition off.
2. Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.

Is the resistance below 1.5 Ohms (should be approximately 4.3 Ohms)?

No

- Go To 6

Yes

- Go To 5

5. (Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO THE (Q89) LIFTGATE CLOSE DRIVER CIRCUIT




1. Disconnect the Power Liftgate Drive Unit connector.
2. Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.

Is the resistance below 1,000 Ohms?

No

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

Yes

- Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

6. POWER LIFTGATE DRIVE UNIT
1. Re-connect the Power Liftgate Module C1 connector.
2. Operate the Power Liftgate in both directions if possible.

Does the motor start to lift the liftgate but is very slow and labors extensively?

Yes

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

No

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