B18E4

B18E4-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT HIGH





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

- 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. DTC PRESENT
1. With the scan tool, record the DTCs.
2. Erase the 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. With the scan tool, read the 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




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

Does the scan tool display B18E3-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT LOW?

Yes

- Go To 3

No

- Replace the Overhead Liftgate 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 (Q25) Liftgate Switch Sense circuit.

Is there any voltage present?

No

- Go To 4

Yes

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

4. (G25) LIFTGATE SWITCH SENSE CIRCUIT OPEN





NOTE: Graphic shows switch for vehicle without sunroof. If sunroof equipped, measure from cavity 6.

1. Turn the ignition off.
2. Disconnect the Overhead Liftgate Release Switch harness connector.
3. Measure the resistance of the (G25) Liftgate Switch Sense circuit between the Overhead Liftgate Release Switch harness connector and the PLG Module C2 harness connector.

Is the resistance below 5.0 Ohms?

No

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

Yes

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