B1967

B1967-POWER LIFTGATE OPEN DIRECTION OVERCURRENT





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL


- 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.






Diagnostic Test


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


2. BINDING LIFTGATE
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.
Raise the liftgate and check the struts for proper operation.
If necessary manually operate the liftgate of a known good vehicle and notice the effort needed.
Compare the effort needed on the disabled vehicle.
Were there any mechanical problems found?

Yes


- Perform the appropriate repairs.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Go To 3


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




Disconnect the Power Liftgate Module C1 connector.
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 BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Go To 4


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




Turn the ignition off.
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 SHORT TO (Q89) LIFTGATE CLOSE DRIVER CIRCUIT




Disconnect the Power Liftgate Drive Unit connector.
Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.
Is the resistance below 1000.0 ohms?

No


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


Yes


- Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


6. POWER LIFTGATE DRIVE UNIT
Re-connect the Power Liftgate Module C1 connector.
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 BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


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