B18E4-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
- 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.
| Possible Causes |
| (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE |
| (G25) LIFTGATE SWITCH SENSE CIRCUIT OPEN |
| LIFTGATE (OVERHEAD) SWITCH |
| POWER LIFTGATE MODULE |
Diagnostic Test
1. DTC PRESENTWith the scan tool, record DTCs.
Erase DTCs.
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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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.
Disconnect the Overhead Liftgate Release Switch harness connector.
Erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read DTC's.
Does the scan tool display B18E4–POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT HIGH?
Yes
- Go To3
No
- Replace the Overhead Liftgate Switch, or for vehicles with a sunroof, replace the Sunroof/Liftgate overhead switch assembly in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
Disconnect the Power Liftgate Module C2 harness connector.
Measure the voltage between ground and the (G25) Liftgate Switch Sense circuit.
Is there any voltage present?
No
- Go To4
Yes
- Repair the (G25) Liftgate Switch Sense circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
4. (G25) LIFTGATE SWITCH SENSE CIRCUIT OPEN
Turn the ignition off.
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?
No
- Repair the (G25) Liftgate Switch Sense circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
Yes
- Replace the Power Liftgate Module in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).