B1951

B1951-POWER LIFTGATE TEMPERATURE SENSOR CIRCUIT HIGH





For a complete wiring diagram Consult Diagrams/Electrical

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

- Set Condition:
If the module senses a resistance above 382K ohms on the Liftgate Temperature Sensor Signal circuit, this code will set. The normal range for the sensor is 1.2K to 382K ohms. At room temperature (20° C or 68° F) the resistance will be between 11.2K and 13.5K ohms.





Diagnostic Test

1. DTC PRESENT
With the scan tool, record and 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 B1951-POWER LIFTGATE TEMPERATURE SENSOR 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. POWER LIFTGATE MODULE




Disconnect the Power Liftgate Module C2 connector.
Measure the resistance of the (G32) liftgate Temperature Sensor Signal circuit to the (Q901) Ground circuit in the PLG C2 connector.
Is the resistance between 1.2K and 382K ohms?

Yes

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

No

- Go To 3

3. (G32) LIFTGATE TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE




Turn the ignition on.
Turn the park lights on.
Measure the voltage between ground and the (G32) liftgate Temperature Sensor Signal circuit in PLG C2 harness connector.
Is there any voltage present?

Yes

- Repair the (G32) Liftgate Temperature Sensor Signal circuit for a short to voltage.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4


4. (Q901) GROUND WIRE OPEN




Disconnect the License Lamp (light bar) connector.
Measure the resistance of the (Q901) Ground circuit between the PLG C2 connector and the License Lamp connector.
Is the resistance below 2.0 ohms

Yes

- Go To 5

No

- Repair the (Q901) Ground wire for an open.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

5. (G32) LIFTGATE TEMPERATURE SIGNAL WIRE OPEN




Measure the resistance of the (G32) liftgate Temperature Sensor Signal circuit between the License Lamp connector and the PLG C2 connector.
Is the resistance below 5.0 ohms?

Yes

- Replace the Liftgate Temperature Sensor (License Lamp).
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (G32) Liftgate Temperature Sensor Signal circuit for an open.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test