B1888

B1888-POWER LIFTGATE PINCH SENSOR 1 CIRCUIT LOW





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
Whenever the Power Liftgate Module is awake.

- Set Condition:
The power liftgate module has detected the left pinch sensor circuit voltage is under 1.8 volts for over 20 seconds.





Diagnostic Test

1. DTC PRESENT
With the scan tool, record DTC's and any liftgate inhibitors.
Erase DTC's
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times.
With the scan tool, read DTCs.
Does the scan tool display B1888-POWER LIFTGATE PINCH SENSOR 1 CIRCUIT LOW?

Yes

- Go To 2

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

2. (Q75) LEFT PINCH SENSOR SIGNAL CIRCUIT SHORT TO (Q901) GROUND CIRCUIT




Turn the ignition off.
Open the liftgate.
Disconnect the Power Liftgate Module C1 and C2 harness connectors.
Measure the resistance between the (Q75) Left Pinch Sensor Signal circuit and the (Q901) Logic Ground circuit in the PLGM C2 harness connector.
Is the resistance below 200.0 ohms?

Yes

- Repair the (Q75) Left Pinch Sensor Signal circuit for a short to the (Q901) Logic Ground circuit.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 6

3. (Q203) POSITION SENSOR SIGNAL CIRCUIT SHORT TO GROUND




Measure the resistance between ground and the (Q203) Position Sensor Signal circuit in the PLGM C1 harness connector.
Is the resistance below 5.0 ohms?

Yes

- Go To 4

No

- Repair the (Q203) Position Sensor Signal circuit for a short to ground.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

4. POWER LIFTGATE MODULE SHORT TO GROUND




Re-connect the PLGM C1 harness connector.
Measure the resistance between ground and the (Q75) Left Pinch Sensor Signal circuit in the PLGM C2 harness connector.
Is the resistance below 100.0 ohms?

Yes

- Go To 5

No

- Replace the Power Liftgate Module.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

5. RIGHT PINCH SENSOR SHORT TO GROUND




Disconnect the Right Pinch Sensor connector
Measure the resistance between ground and the (Q75) Left Pinch Sensor Signal circuit in the PLGM C2 harness connector.
Is the resistance below 100.0 ohms?

Yes

- Go To 6

No

- Replace the Right Pinch Sensor.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

6. (Q77) RIGHT PINCH SENSOR SIGNAL CIRCUIT SHORT TO (Q901) LOGIC GROUND




Measure the resistance between the (Q77) Right Pinch Sensor Signal circuit and the (Q901) Logic Ground circuit in the Right Pinch Sensor harness connector.
Is the resistance below 5.0 ohms?

Yes

- Go To 7

No

- Repair the (Q77) Right Pinch Sensor Signal circuit for a short to the (Q901) Logic ground.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

7. (Q77) RIGHT PINCH SENSOR SIGNAL WIRE SHORT TO GROUND




Disconnect the Right Pinch Sensor Signal Wire from the Left Pinch Sensor connector.
Measure the resistance between ground and the (Q75) Left Pinch Sensor Signal circuit in the PLGM C2 harness connector.
Is the resistance below 100.0 ohms?

Yes

- Repair the Right Pinch Sensor Signal wire for a short to ground.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 8

8. LEFT PINCH SENSOR SHORT TO GROUND




Disconnect the Left Pinch Sensor connector
Measure the resistance between ground and the (Q75) Left Pinch Sensor Signal circuit in the PLGM C2 connector.
Is the resistance below 100.0 ohms?

Yes

- Repair the (Q75) Left Pinch Sensor Signal wire for a short to ground.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Left Pinch Sensor.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test