B18E3

B18E3-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT LOW





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 of less than 2.0 Volts on the (G25) Liftgate Switch Sense circuit for longer than 10 seconds, 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 B18E3-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT LOW?

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 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 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 SHORT TO THE (Q901) LOGIC GROUND CIRCUIT




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C2 harness connector.
3. Measure the resistance between the (Q901) Logic Ground circuit and the (G25) Liftgate Switch Sense circuit.

Is the resistance below 1,000 Ohms?

Yes

- Repair the (G25) Liftgate Switch Sense circuit for a short to the (Q901) Logic Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

4. (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORT TO GROUND




1. Measure the resistance between ground and the (G25) Liftgate Switch Sense circuit.

Is the resistance below 10,000 Ohms?

Yes

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

No

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