B18E3-POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT LOW
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 of less than 2.0 volts on the (G25) Liftgate Switch Sense circuit for longer than 10 seconds, this code will set.
| Possible Causes |
| (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORT TO GROUND |
| (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORT TO THE (Q901) LOGIC GROUND CIRCUIT |
| 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 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 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 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 B18E3–POWER LIFTGATE FRONT ZONE SWITCH CIRCUIT LOW?
Yes
- Go To3
No
- Replace the Overhead Liftgate 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 THE (Q901) LOGIC GROUND CIRCUIT
Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance between the (Q901) Logic Ground circuit and the (G25) Liftgate Switch Sense circuit.
Is the resistance below 10000.0 ohms?
Yes
- Go To3
No
- 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).
4. (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORT TO GROUND
Measure the resistance between ground and the (G25) Liftgate Switch Sense circuit.
Is the resistance below 10000.0 ohms?
Yes
- Repair the (G25) Liftgate Switch Sense circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- 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).