B188E

B188E-POWER LIFTGATE CONTROL CIRCUIT 1 HIGH





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

- When Monitored:
Whenever the Power Liftgate is power opening or closing.

- Set Condition:
When the Power Liftgate Module senses voltage more than 9.5 Volts on the (Q88) Liftgate Open Driver circuit prior to starting a liftgate power open or close cycle, this code will set.





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 B188E-POWER LIFTGATE CONTROL CIRCUIT 1 HIGH?

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. (Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Disconnect the Power Liftgate Drive Unit harness connector.
4. Turn the ignition on.
5. Measure the voltage between the (Q88) Liftgate Open Driver circuit and ground.

Is there any voltage present?

Yes

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

No

- Go To 3

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




1. 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 10,000 Ohms?

Yes

- Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit. If the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuits are OK, replace the Power Liftgate Drive Unit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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