B188E

B188E-POWER LIFTGATE CONTROL CIRCUIT 1 HIGH





For a complete wiring diagram Consult Diagrams/Electrical

- 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.





Diagnostic Test

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

2. (Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORT TO VOLTAGE




Turn the ignition off.
Disconnect the Power Liftgate Module C1 harness connector.
Disconnect the Power Liftgate Drive Unit harness connector.
Turn the ignition on.
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 BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To 3

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




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 10000.0 ohms?

No

- Replace the Power Liftgate Module.
- 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. If the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuits are OK, replace the Power Liftgate Drive Unit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.