B188C-12

B188C-12-LIFTGATE CONTROL CIRCUIT 1 - CIRCUIT SHORT TO BATTERY





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 cycle, this code will set.





1. DTC PRESENT
1. With the scan tool, record and erase the DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. If possible, operate the liftgate several times.
4. With the scan tool, read the Active DTCs.

Does the scan tool display; B188C-12-LIFTGATE CONTROL CIRCUIT 1 - CIRCUIT SHORT TO BATTERY?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- 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 ground and the (Q88) Liftgate Open Driver circuit in the PLGM C1 harness connector.

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 10K Ohms?

Yes

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

No

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