Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DTCS
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. Operate the liftgate several times.
4. With the scan tool, read the Active DTCs.
  Does the scan tool display; B1945-11-POWER LIFTGATE PINCH SENSOR 2 - CIRCUIT SHORT TO GROUND?
  
  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 .
CHECK THE LEFT PINCH SENSOR FOR A SHORT
1. Disconnect the Left Liftgate Pinch Sensor harness connector.
2. Erase the DTCs.
3. Cycle the ignition off, wait 20 seconds, then cycle the ignition on.
4. With the scan tool, read the Active DTCs.
  Does the scan tool display; B1945-11-POWER LIFTGATE PINCH SENSOR 2 - CIRCUIT SHORT TO GROUND?
  
  Yes
  - Go To 3
  No
  - Replace the Left Liftgate Pinch Sensor in accordance with the service information. Refer to SENSOR, PINCH, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Q75) LEFT PINCH SENSOR SIGNAL FOR A SHORT TO GROUND
1. Cycle the ignition off.
2. Disconnect the Power Liftgate Module C2 harness connector.
3. Measure the resistance between ground and the (Q75) Left Pinch Sensor Signal harness circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (Q75) Left Pinch Sensor Signal circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (Q75) LEFT PINCH SENSOR SIGNAL FOR A SHORT TO THE (Q901) LOGIC GROUND CIRCUIT
1. Measure the resistance between the (Q75) Left Pinch Sensor Signal circuit and the (Q901) Logic Ground circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (Q75) Left Pinch Sensor Signal circuit for a short to the (Q901) Logic Ground 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 (PLGM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .