Diagnostic Test

CHECK FOR ACTIVE DTCS
1. With the scan tool, record and erase the DTCs.
2. Cycle the ignition off, wait 10 seconds, then cycle the ignition on.
3. Operate the power liftgate several times if possible.
4. With the scan tool, read the Active DTCs.
  Does the scan tool display; B196A-00-POWER LIFTGATE CLOSE DIRECTION OVER CURRENT?
  
  Yes
  - Go To 2
  No
  - Using the appropriate SYSTEM 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.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK FOR A BINDING LIFTGATE
1. Examine the liftgate for proper alignment, worn or binding hinges, weak liftgate prop assembly, or loose/hard weather strip for wear or anything that would cause an obstruction to proper operation.
2. Check the struts to be sure they are not binding when the liftgate is opening or closing.
3. If necessary, manually operate the liftgate of a known good vehicle and notice the effort needed.
4. Compare the effort needed on the disabled vehicle.
  Were there any mechanical problems found?
  
  Yes
  - Refer to Standard Procedures according to the Service Information. Refer to STANDARD PROCEDURE .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE POWER LIFTGATE DRIVE UNIT
1. Reconnect all connectors.
2. Operate the Power Liftgate in both directions if possible.
  Does the motor start to lift or lower the liftgate but moves very slow and labors extensively?
  
  Yes
  - Replace the Power Liftgate Drive Unit assembly in accordance with the service information. Refer to DRIVE UNIT, POWER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Test complete. Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .