B188E

B188E - Power Liftgate Control Circuit 1 High






For a complete wiring diagram, refer to

• 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 liftgate open driver circuit prior to starting a liftgate power cycle, this code will set.






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 B188E - Power Liftgate Control Circuit 1 High?

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 - 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 liftgate open driver circuit and ground.

Is there any voltage present?

Yes

• Repair the liftgate open driver circuit for a short to voltage.

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

No

• Go to Test Step 3

Test Step 3 - Liftgate Close Driver Circuit Short to Voltage






• Measure the voltage between the liftgate close driver circuit and ground.

Is there any voltage present?

Yes

• Repair the liftgate close driver circuit for a short to voltage.

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

No

• Go to Test Step 4

Test Step 4 - Liftgate Open Driver Circuit Short to Liftgate Close Driver Circuit






• Turn the ignition OFF.

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

Is the resistance less than 10k ohms?

No

• Replace the power liftgate module.

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

Yes

• Repair the liftgate open driver circuit for a short to the liftgate close driver circuit.

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