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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Power Liftgate System - Electrical Diagnostics >> Power Liftgate - Electrical Diagnostics >> DTC Troubleshooting >> B1950-Power Liftgate Temperature Sensor Circuit Low >> Diagnostic Test

Diagnostic Test

  1. 1) CHECK FOR DTCS 

    With the scan tool, record DTCs and any liftgate inhibitors.

    Erase DTCs.

    Turn the ignition off, wait 10 seconds, then turn the ignition on.

    With the scan tool, read DTCs.

    Does the scan tool display B1950-POWER LIFTGATE TEMPERATURE SENSOR CIRCUIT LOW? 

    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) CHECK FOR OTHER PINCH SENSOR DTCS 

    With the scan tool, check for other Power Liftgate DTCs.

    Are there any other Pinch Sensor DTCs? 

    Yes 

    1. Repair the other Liftgate Pinch Sensor DTCs before proceeding.

    No 

    1. Go to  3).
  3. 3) CHECK THE LIFTGATE AMBIENT TEMPERATURE SENSOR 
    Fig 1: Checking Right Liftgate Pinch/Temp Sensor Connector
    GC0044198Courtesy of CHRYSLER LLC
    NOTE: The vehicle must be in a warm environment of approximately 70 degrees Fahrenheit for the results of this next step to be valid.

    Turn the ignition off.

    Open the liftgate.

    Allow the vehicle to stabilize in the warm environment for at least one hour.

    Disconnect the Right Liftgate Pinch/Temp Sensor harness connector.

    Measure the resistance between the (Q901) Logic Ground circuit and the (Q78) Right Pinch Sensor Signal circuit in the Right Liftgate Pinch/Temp Sensor (component side) connector.

    NOTE: Graphic shows the harness side - component side is the mate connector.

    Is the resistance between 11300 and 13700 ohms? 

    Yes 

    1. Go to  4).

    No 

    1. Replace the Right Liftgate Pinch/Temp Sensor in accordance with the service information.
    2. Perform BODY VERIFICATION TEST .
  4. 4) (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT SHORT TO GROUND 
    Fig 2: Measuring Resistance Between Ground And Right Pinch Sensor Signal Circuit
    GC0044192Courtesy of CHRYSLER LLC

    Disconnect the Power Liftgate Module C2 harness connector.

    Measure the resistance between ground and the (Q78) Right Liftgate Pinch Temp Sensor Signal circuit.

    Is the resistance below 10000.0 ohms? 

    No 

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

    Yes 

    1. Repair the (Q78) Right Liftgate Pinch/Temp Sensor Signal circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST .
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