B18E4

B18E4-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT HIGH





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

- When Monitored:
Whenever the Power Liftgate Module is awake.

- Set Condition:
When the Power Liftgate Module senses a voltage over 4.7 Volts on the (G25) Liftgate Switch Sense circuit, this code will set.





1. DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
1. Using the scan tool, record DTCs.
2. Erase DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. Operate the liftgate several times from the overhead switch.
5. Using the scan tool, read DTCs.

Does the scan tool display B18E4-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT HIGH?

Yes

- Go To 2

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. LIFTGATE RELEASE SWITCH SHORTED





NOTE: Vehicles equipped with a sunroof have the Power Liftgate Switch integrated into the Sunroof Switch Assembly. The graphic shows switch connectors for vehicles with and without a sunroof.

1. Disconnect the Overhead Liftgate Release Switch harness connector.
2. Erase DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. Using the scan tool, read DTCs.

Does the scan tool display B18E4-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT HIGH?

Yes

- Go To 3

No

- Replace the Overhead Liftgate Switch, or for vehicles with a sunroof, replace the Sunroof/Liftgate overhead switch assembly.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORTED TO VOLTAGE




1. Disconnect the Power Liftgate Module C2 harness connector.
2. Measure the voltage between ground and the (G25) Liftgate Switch Sense circuit.

Is there any voltage present?

Yes

- Repair the (G25) Liftgate Switch Sense circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (G25) LIFTGATE SWITCH SENSE CIRCUIT OPEN




1. Turn the ignition off.
2. Measure the resistance of the (G25) Liftgate Switch Sense circuit between the Switch connector and the Power Liftgate C2 harness connector.

Is the resistance below 5.0 Ohms?

Yes

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

No

- Repair the (G25) Liftgate Switch Sense circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.