B188C-13

B188C-13-LIFTGATE CONTROL CIRCUIT 1 - CIRCUIT OPEN





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

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

- 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) has opened up.





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-13-LIFTGATE CONTROL CIRCUIT 1 - CIRCUIT OPEN?

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 poor pin fit.
- 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.

NOTE: Be sure to use an accurate DVOM in the following step. Zero the meter before beginning.

Is the resistance approximately 0.5 of an Ohm?

Yes

- Replace the Power Liftgate Module. Power Liftgate Control Module - Removal.
- 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 PLG C1 connector and the PLG Drive Unit connector.

Is the resistance below 2.0 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 PLG C1 connector and the PLG Drive Unit connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Power Liftgate Drive Unit. Power Liftgate Drive Unit - Removal
- 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.