B194F-POWER LIFTGATE TEMPERATURE SENSOR CIRCUIT PERFORMANCE
For a complete wiring diagram Refer to Section 8W
- When Monitored:
Whenever the Power Liftgate is awake.
- Set Condition:
The Power Liftgate Module has detected the ambient temperature indicated by the liftgate temperature/pinch sensor is out of range.
| Possible Causes |
| AMBIENT TEMPERATURE DTC |
| (Q78) RIGHT PINCH SENSOR SIGNAL WIRE OPEN |
| (Q901) LOGIC GROUND OPEN |
| TEMPERATURE SENSOR OUT OF RANGE |
| POWER LIFTGATE MODULE |
Diagnostic Test
1. CHECK FOR DTCSWith the scan tool, record DTCs and any liftgate inhibitors.
Erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read DTCs.
Does the scan tool display B194F–POWER LIFTGATE TEMPERATURE SENSOR CIRCUIT PERFORMANCE?
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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. CHECK FOR OTHER PINCH SENSOR DTCS
With the scan tool, read other Power Liftgate DTCs.
Are there any other Pinch Sensor DTCs?
Yes
- Repair the other Liftgate Pinch Sensor DTCs before proceeding.
No
- Go To 3
3. CHECK THE LIFTGATE AMBIENT TEMPERATURE SENSOR
NOTE: The vehicle must be in a warm environment of approximately 70 degrees Fahrenheit for the results of this next step to be valid.
Turn the ignition off.
Open the liftgate.
Allow the vehicle to stabilize in the warm environment for at least one hour.
Disconnect the Right Liftgate Pinch/Temp 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 11300 and 13700 ohms?
Yes
- Go To 4
No
- Replace the Right Liftgate Pinch/Temp Sensor in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
4. (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT OPEN
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance of the Right Pinch Sensor Signal circuit between the Power Liftgate Module C2 harness connector and the Right Liftgate Pinch/Temp Sensor harness connector.
Is the resistance below 2.0 ohms?
Yes
- Go To 5.
No
- Repair the (Q78) Right Pinch/Temp Sensor Signal circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
5. (Q78) RIGHT PINCH SENSOR SIGNAL CIRCUIT SHORT TO GROUND
Measure the resistance between ground and the (Q78) Right Liftgate Pinch Temp Sensor Signal circuit.
Is the resistance below 10000.0 ohms?
No
- Go To 6
Yes
- Repair the (Q78) Right Liftgate Pinch/Temp Sensor Signal circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
6. (Q901) LOGIC GROUND OPEN
Measure the resistance of the (Q901) Logic Ground circuit between the Right Liftgate Pinch/Temp Sensor harness connector and the Power Liftgate C2 harness connector.
Is the resistance below 2.0 ohms?
Yes
- Replace the Power Liftgate Module in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Repair the (Q901) Logic Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).