B18E4

B18E4-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT HIGH





For a complete wiring diagram Consult Diagrams/Electrical

- 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.





Diagnostic Test

1. DTC PRESENT
With the scan tool, record DTC's.
Erase DTC's
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times from the overhead switch.
With 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 BODY VERIFICATION TEST - VER 1. Body Verification Test.

Diagnostic Test

2. LIFTGATE RELEASE SWITCH SHORTED




Disconnect the Overhead Liftgate Release Switch connector.
Erase DTC's
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read DTC's.
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 BODY VERIFICATION TEST - VER 1. Body Verification Test.

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




Disconnect the Power Liftgate Module C2 harness connector.
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 BODY VERIFICATION TEST - VER 1. 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.

Turn the ignition off.
Disconnect the Overhead Liftgate Release Switch harness connector.
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 BODY VERIFICATION TEST - VER 1. Body Verification Test.

Yes

- Replace the Power Liftgate Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.