Diagnostic Test

DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
1. Using the scan tool, read and clear all active DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. Operate the power liftgate several times if possible.
4. Using the scan tool, read DTCs.
  Does the scan tool display B1986-POWER LIFTGATE LATCH CONTROL 2 CIRCUIT OPEN?
  
  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 in the latch assembly.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK THE LIFTGATE LATCH CIRCUIT FOR AN OPEN

Fig 1: Checking Liftgate Latch Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C2 harness connector.
3. Measure the resistance between the (Q84) Liftgate Latch Cinch Driver circuit and the (Q85) Liftgate Latch Release Driver circuit.
  Is the resistance approximately 4.0 Ohms?
  
  Yes
  - Replace the Power Liftgate Module in accordance with service information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
CHECK THE (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT FOR AN OPEN

Fig 2: Checking Liftgate Latch Cinch Driver Circuit Open
Courtesy of CHRYSLER LLC
1. Disconnect the Power Liftgate Latch harness connector.
2. Measure the resistance of the (Q84) Liftgate Latch Cinch Driver circuit between the Power Liftgate Module C2 harness connector and the Power Liftgate Latch harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 4
  No
  - Repair the (Q84) Liftgate Latch Cinch Driver circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK THE (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT FOR AN OPEN

Fig 3: Checking Liftgate Latch Release Driver Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (Q85) Liftgate Latch Release Driver circuit between the Power Liftgate Module C2 harness connector and the Power Liftgate Latch harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Power Liftgate Latch assembly in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Repair the (Q85) Liftgate Latch Release Driver circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .