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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Power Liftgate System - Electrical Diagnostics >> Power Liftgate - Electrical Diagnostics >> DTC Troubleshooting >> B18E4-Power Liftgate Front Zone Switch Circuit High >> Diagnostic Test

Diagnostic Test

  1. 1) DTC PRESENT 

    With 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 

    1. Go to  2).

    No 

    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
    2. Perform BODY VERIFICATION TEST .
  2. 2) LIFTGATE RELEASE SWITCH SHORTED 
    Fig 1: Liftgate Release Switch PLG Connector And Sunroof/Liftgate Switch PLG Connector
    GC0044184Courtesy of CHRYSLER LLC
    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 

    1. Go to  3).

    No 

    1. Replace the Overhead Liftgate Switch, or for vehicles with a sunroof, replace the Sunroof/Liftgate overhead switch assembly in accordance with the service information.
    2. Perform BODY VERIFICATION TEST .
  3. 3) (G25) LIFTGATE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE 
    Fig 2: Measuring Voltage Between Ground And Liftgate Switch Sense Circuit
    GC0044186Courtesy of CHRYSLER LLC

    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 

    1. Go to  4).

    Yes 

    1. Repair the (G25) Liftgate Switch Sense circuit for a short to voltage.
    2. Perform BODY VERIFICATION TEST .
  4. 4) (G25) LIFTGATE SWITCH SENSE CIRCUIT OPEN 
    Fig 3: Measuring Resistance Of Liftgate Switch Sense Circuit
    GC0044185Courtesy of CHRYSLER LLC

    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 

    1. Repair the (G25) Liftgate Switch Sense circuit for an open.
    2. Perform BODY VERIFICATION TEST .

    Yes 

    1. Replace the Power Liftgate Module in accordance with the service information.
    2. Perform BODY VERIFICATION TEST .
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