Diagnostic Test

DTC PRESENT
1. With the scan tool, record and erase DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. Operate the Power Liftgate several times from stop to stop if possible.
4. With the scan tool, read ACTIVE DTCs.
  Does the scan tool display B196C-POWER LIFTGATE CLOSE DIRECTION EXCESSIVE POSITION SENSOR COUNTS?
  
  Yes
  - Go to step 2
  No
  - Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding conditions.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
BINDING LIFTGATE
1. 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.
2. 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
  - Refer to appropriate Service Information for the related symptom(s).
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
POWER LIFTGATE MODULE - POSITION SENSE OPEN
1. 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
  - Go to step 4
  No
  - Replace the Power Liftgate Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(Q901) LOGIC GROUND OPEN

Fig 1: Checking Logic Ground Open
Courtesy of CHRYSLER LLC
1. 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
  - Go to step 5
  No
  - Repair the (Q901) Logic Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
POWER LIFTGATE DRIVE UNIT
1. Reconnect all harness connectors.
2. 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
  - Replace the Power Liftgate Drive Unit assembly in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the Power Liftgate Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .