B188F

B188F - Power Liftgate Control Circuit 1 Open






For a complete wiring diagram, refer to

• When Monitored: Whenever the power liftgate is power opening or power closing.

• Set Condition: When the power liftgate module senses no current on the 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.






Test Step 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, check for DTCs.

Does the scan tool display B188F - Power Liftgate Control Circuit 1 Open?

Yes

• Go to Test Step 2

No

• Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Power Liftgate Module






• Turn the ignition OFF.

• Disconnect the power liftgate module C1 harness connector.

• Measure the resistance between the liftgate open driver circuit and the liftgate close driver circuit.

Is the resistance approximately 4.3 ohms?

No

• Go to Test Step 3

Yes

• Replace the power liftgate module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 3 - Liftgate Open Driver Circuit Open






• Disconnect the power liftgate drive unit harness connector.

• Measure the resistance of the liftgate open driver circuit between the PLG C1 connector and the PLG drive unit connector.

Is the resistance less than 5.0 ohms?

No

• Repair the liftgate open driver circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Yes

• Go to Test Step 4

Test Step 4 - Liftgate Close Driver Circuit Open






• Measure the resistance of the liftgate close driver circuit between the PLG C1 connector and the PLG drive unit connector.

Is the resistance less than 5.0 ohms?

No

• Repair the liftgate close driver circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Yes

• Replace the power liftgate drive unit.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior