Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Test
- CHECK FOR ACTIVE DTCS NOTE:
The vehicle should be at room temperature when this test is performed.
- With the scan tool, record and erase the DTCs and any liftgate inhibitors.
- Cycle the ignition off, wait 20 seconds, then cycle the ignition on.
- Be sure the liftgate is closed.
- Open and close the liftgate several times.
- 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 .
- DISCONNECT THE RIGHT LIFTGATE PINCH SENSOR TO CHECK FOR A SHORT
- Disconnect the Right Liftgate Pinch Sensor harness connector.
- Erase the DTCs.
- Cycle the ignition off, wait 10 seconds, then cycle the ignition on.
- 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 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 .
- CHECK THE (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
- Cycle the ignition off.
- Disconnect the Power Liftgate Module C2 harness connector.
- Measure the resistance between ground and the (Q78) Right Pinch Sensor Signal circuit.
Is the resistance below 20K Ohms?
Yes
- Repair the (Q78) Right 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 (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT SHORTED TO THE (Q901) LOGIC GROUND CIRCUIT
- Measure the resistance between the (Q78) Right Pinch Sensor Signal circuit and the (Q901) Logic Ground circuit.
Is the resistance below 20K Ohms?
Yes
- Repair the (Q78) Right Pinch Sensor Signal circuit for a short to the (Q901) Logic ground.
- 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 (PLGM), REMOVAL .
- Test complete. Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- Measure the resistance between the (Q78) Right Pinch Sensor Signal circuit and the (Q901) Logic Ground circuit.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.