B1948

B1948-POWER LIFTGATE PINCH SENSOR 2 CIRCUIT HIGH





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL


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

- Set Condition:
The Power Liftgate Module has detected the Right Liftgate Pinch Sensor circuit voltage is above 9.5 volts for over 10 seconds.






Diagnostic Test

NOTE: The vehicle should be at room temperature when this test is performed


1. DTC PRESENT
With the scan tool, record DTCs and any liftgate inhibitors.
Erase DTCs.
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 B1948-POWER LIFTGATE PINCH SENSOR 2 CIRCUIT HIGH?

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. (Q901) LOGIC GROUND OPEN




Turn the ignition off.
Disconnect the Right Liftgate Pinch Sensor connector.
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 BODY VERIFICATION TEST - VER 1.Body Verification Test.


3. CHECK THE RIGHT LIFTGATE PINCH SENSOR
Disconnect the Right Liftgate Pinch Sensor harness connector.
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: Graphic shows the harness side - component side is the mate connector.

Is the resistance between 9,000 and 11,500 ohms?

Yes


- Go To 4


No


- Replace the Right Liftgate Pinch/Temp Sensor.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


4. (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT OPEN




Turn the ignition on.
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


5. CHECK THE (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT FOR AN OPEN




Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
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 5.0 ohms?

Yes


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


No


- Repair the (Q78) Right Pinch Sensor Signal circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


6. (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE




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 4.5 volts?

No


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


Yes


- Go To 7


7. (Q78) RIGHT PINCH SENSOR SIGNAL WIRE SHORT TO VOLTAGE




Disconnect the Power Liftgate Module C2 harness connector.
Connect a jumper wire from the (Q901) Logic Ground (Cavity 2) in the Right Pinch Sensor harness connector to ground.
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 there any voltage present?

No


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


Yes


- Repair the (Q78) Right Pinch Sensor Signal circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.