B1967

B1967 - Power Liftgate Open Direction Overcurrent






For a complete wiring diagram, refer to

• 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 500ms. during the power opening operation.






Test Step 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, check for DTCs.

Does the scan tool display B1967 - Power Liftgate Open Direction Overcurrent?

Yes

• Go to Test Step 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. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 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 Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 3

Test Step 3 - Liftgate Close Driver Circuit Short to Voltage






• Disconnect the power liftgate module C1 connector.

• Measure the voltage between the liftgate close driver circuit and ground.

Is there any voltage present?

Yes

• Repair the liftgate close driver circuit for a short to voltage.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 4

Test Step 4 - Liftgate Open Driver Circuit Short to Liftgate Close Driver Circuit






• Turn the ignition OFF.

• Measure the resistance between the liftgate open driver circuit and the liftgate close driver circuit.

Is the resistance less than 1.5 ohms (should be approximately 4.3 ohms)?

No

• Go to Test Step 6

Yes

• Go to Test Step 5

Test Step 5 - Liftgate Open Driver Circuit Short to Liftgate Close Driver Circuit






• Disconnect the power liftgate drive unit connector.

• Measure the resistance between the liftgate open driver circuit and the liftgate close driver circuit.

Is the resistance less than 10k ohms?

No

• Replace the power liftgate drive unit.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Yes

• Repair the liftgate open driver circuit for a short to the liftgate close driver circuit.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 6 - Power Liftgate Drive Unit

• 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 the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Replace the power liftgate module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior