B188F

B188F-POWER LIFTGATE CONTROL CIRCUIT 1 OPEN





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

- When Monitored:
Whenever the Power Liftgate Module is performing a power opening operation.

- Set Condition:
When the Power Liftgate Module senses no current on the (Q88) Liftgate Open Driver circuit and no liftgate movement, this code will set. It is also possible for this code to set if the liftgate has been run several times and the internal circuit breaker (Thermo Protection Device) in the drive unit has opened up.





1. DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
1. Using the scan tool, record DTCs.
2. Erase DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. If possible, operate the liftgate several times.
5. Using the scan tool, read DTCs.

Does the scan tool display B188F-POWER LIFTGATE CONTROL CIRCUIT 1 OPEN?

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. POWER LIFTGATE MODULE




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.

Is the resistance approximately 4.3 Ohms?

Yes

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

No

- Go To 3

3. (Q88) LIFTGATE OPEN DRIVER CIRCUIT OPEN




1. Disconnect the Power Liftgate Drive Unit harness connector.
2. Measure the resistance of the (Q88) Liftgate Open Driver circuit between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the (Q88) Liftgate Open Driver circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (Q89) LIFTGATE CLOSE DRIVER CIRCUIT OPEN




1. Measure the resistance of the (Q89) Liftgate Close Driver circuit between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.

Is the resistance below 5.0 Ohms?

Yes

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

No

- Repair the (Q89) Liftgate Close Driver circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.