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 the DTCs and any liftgate inhibitors.
2. Erase the DTCs.
3. Cycle the ignition off, wait 10 seconds, then cycle the ignition on.
4. Operate the liftgate several times.
5. With the scan tool, read the Active DTCs.
  Does the scan tool display; B1964-12-POWER LIFTGATE SENSOR SUPPLY - 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 poor pin fit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Q901) LOGIC GROUND CIRCUIT OPEN

Fig 1: Checking Logic Ground For Open
Courtesy of CHRYSLER GROUP, LLC
1. Cycle the ignition off.
2. Disconnect the Power Liftgate Module C2 harness connector.
3. Disconnect the Power Liftgate Drive Unit harness connector.
4. Measure the resistance of both of the (Q901) Logic Ground circuits between the Power Liftgate Module C2 harness connector and the Power Liftgate Drive Unit connector.
  Is the resistance below 2.0 Ohms on both?
  
  Yes
  - Go To 3
  No
  - Repair the (Q901) Logic Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Q203) POSITION SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking Position Sensor Supply Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Connect the Power Liftgate Module C2 harness connector.
2. Cycle the ignition on.
3. Measure the voltage between the (Q901) Logic Ground circuit and the (Q203) Position Sensor Supply circuit in the Power Liftgate Drive Unit connector.
  Is the voltage above 5.5 volts?
  
  Yes
  - Repair the (Q203) Position Sensor Supply circuit for a short to voltage. If the power liftgate is inoperative after repairing the (Q203) Position Sensor Supply circuit, replace the Power Liftgate Drive Unit in accordance with the service information. Refer to DRIVE UNIT, POWER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
(Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN

Fig 3: Checking Position Sensor Supply Circuit Shorted To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Cycle the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Measure the resistance of the (Q203) Position Sensor Supply circuit between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.
  Is the resistance below 1.0 Ohm?
  
  Yes
  - 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 .
  No
  - Repair the (Q203) Position Sensor Supply circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .