Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.

DTC PRESENT
1. With the scan tool, record and erase the DTCs.
2. Turn the ignition off, wait 10 seconds, then cycle the ignition on.
3. If possible, operate the liftgate several times.
4. With the scan tool, read the Active DTCs.
  Does the scan tool display; B188C-12-LIFTGATE CONTROL CIRCUIT 1 - CIRCUIT SHORT TO BATTERY?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO BATTERY

Fig 1: Checking Liftgate Open Driver Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Disconnect the Power Liftgate Drive Unit harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the (Q88) Liftgate Open Driver circuit in the PLGM C1 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (Q88) Liftgate Open Driver circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
(Q89) LIFTGATE CLOSE DRIVER CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking Liftgate Close Driver Wire For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (Q89) Liftgate Close Driver circuit and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (Q89) Liftgate Close Driver circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
(Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO THE (Q89) LIFTGATE CLOSE DRIVER CIRCUIT

Fig 3: Checking Liftgate Open Driver Circuit For Short To Liftgate Close Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Power Liftgate Module in accordance with the service information. Refer to MODULE, POWER LIFTGATE CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .