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
NOTE:
The vehicle should be at room temperature when this test is performed.
1. With the scan tool, record and erase the DTCs and any liftgate inhibitors.
2. Cycle the ignition off, wait 10 seconds, then cycle the ignition on.
3. Open and close the liftgate several times.
4. With the scan tool, read the Active DTCs.
  Does the scan tool display; B1945-12-POWER LIFTGATE PINCH SENSOR 2 - 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 .
(Q901) LOGIC GROUND OPEN

Fig 1: Checking Logic Ground Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Cycle the ignition off.
2. Disconnect the Right Liftgate Pinch Sensor connector.
3. Measure the resistance between ground and the (Q901) Logic Ground circuit in the Right Pinch Sensor harness connector.
  Is the resistance below 9.5 Ohms?
  
  Yes
  - Go To 3.
  No
  - Repair the (Q901) Logic Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE RIGHT LIFTGATE PINCH SENSOR

Fig 2: Checking Right Liftgate Pinch Sensor
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (Q901) Logic Ground circuit and the (Q78) Right Pinch Sensor Signal circuit in the Right Liftgate Pinch/Temp Sensor (Component Side) connector.
  NOTE:
  The graphic shows the harness side - the component side is the male connector.
  
  NOTE:
  The vehicle should be at room temperature when this test is performed. At 50 deg F the reading should be between 18K and 22K. At 77 deg F the reading should be between 9.12K and 10.88K. At 104 deg F the reading should be between 4.90K and 5.75K.
  
  Is the resistance between 4.9K and 22K Ohms depending on the temperature?
  
  Yes
  - Go To 4.
  No
  - Replace the Right Liftgate Pinch/Temp Sensor in accordance with the service information. Refer to SENSOR, PINCH, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT OPEN

Fig 3: Checking Right Pinch Sensor Signal Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Cycle the ignition on.
2. Measure the voltage between the (Q901) Logic Ground circuit and the (Q78) Right Pinch Sensor Signal circuit in the Right Pinch Sensor harness connector.
  Is the voltage below 4.5 volts?
  
  Yes
  - Go To 5.
  No
  - Go To 6
CHECK THE (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT FOR AN OPEN

Fig 4: Checking Right Pinch Sensor Signal Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Cycle the ignition off.
2. Disconnect the Power Liftgate Module C2 harness connector.
3. Measure the resistance of the (Q78) Right Pinch Sensor Signal circuit between the Power Liftgate Module C2 harness connector and the Right Liftgate Pinch Sensor harness connector.
  Is the resistance below 2.0 Ohms?
  
  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 (Q78) Right Pinch Sensor Signal circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 5: Checking Right Pinch Sensor Signal Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (Q901) Logic Ground circuit and the (Q78) Right Pinch Sensor Signal circuit in the Right Pinch Sensor harness connector.
  Is the voltage above 5.0 volts?
  
  Yes
  - Go To 7
  No
  - Replace the Right Liftgate Pinch Sensor in accordance with the Service Information. Refer to SENSOR, PINCH, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Q78) RIGHT PINCH SENSOR SIGNAL WIRE SHORTED TO VOLTAGE

Fig 6: Checking Right Pinch Sensor Signal Wire Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the Power Liftgate Module C2 harness connector.
2. Measure the voltage between ground and the (Q78) Right Pinch Sensor Signal circuit in the Right Pinch Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (Q78) Right Pinch Sensor Signal circuit for a short to voltage.
  - 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 .