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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 >> B196C-Power Liftgate Close Direction Excessive Position Sensor Counts >> Diagnostic Test

Diagnostic Test

  1. 1) DTC PRESENT 

    With the scan tool, record and erase DTCs.

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

    Operate the Power Liftgate several times from stop to stop if possible.

    With the scan tool, read ACTIVE DTCs.

    Does the scan tool display B196C-POWER LIFTGATE CLOSE DIRECTION EXCESSIVE POSITION SENSOR COUNTS? 

    Yes 

    1. Go to  2).

    No 

    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding conditions.
    2. Perform BODY VERIFICATION TEST .
  2. 2) BINDING LIFTGATE 

    Examine the liftgate for proper alignment, worn or binding hinges, weak liftgate prop assembly, loose/hard weatherstrip, for wear or anything that would cause an obstruction to proper operation.

    If necessary manually operate the power liftgate on a known good vehicle and notice the effort needed to open and close for comparison.

    Were there any mechanical problems found? 

    Yes 

    1. Refer to Service information for the related symptom(s).
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Go to  3).
  3. 3) POWER LIFTGATE MODULE - POSITION SENSE OPEN 

    Operate the liftgate from the full closed position and put an obstacle in it's path to make it reverse.

    Did the liftgate reverse back to the closed position? 

    Yes 

    1. Go to  4).

    No 

    1. Replace the Power Liftgate Module in accordance with the service information.
    2. Perform BODY VERIFICATION TEST .
  4. 4) (Q901) LOGIC GROUND OPEN 
    Fig 1: Measuring Resistance Between Ground And Logic Ground Circuit
    GC0048913Courtesy of CHRYSLER LLC

    Measure the resistance between the (Z800) Ground and the (Q901) Logic Ground circuit in the Power Liftgate Drive Unit harness connector.

    Is the resistance below 9.5 ohms? 

    Yes 

    1. Go to  3).

    No 

      NOTE: The (Q901) Logic Ground circuit is grounded through the Power Liftgate Module and the (Z800) Ground circuit.
    1. Repair the (Q901) Logic Ground circuit for an open.
    2. Perform BODY VERIFICATION TEST .
  5. 5) POWER LIFTGATE DRIVE UNIT 

    Reconnect all harness connectors.

    Operate the Power Liftgate in both directions if possible.

    Does the motor start to lift the liftgate but moves very slow and labors extensively? 

    Yes 

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

    No 

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