P1009

P1009-00-HUMIDITY SENSOR MODULE





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Body Control Module (BCM) is the Local Interconnect Network (LIN) master for the humidity sensor. The humidity sensor detects humidity, dew point and windshield glass temperature, and sends this information to the BCM. The BCM then broadcasts the message over the Controller Area Network (CAN) data bus. The repair of this fault condition does not involve any external circuitry and centers on verifying the integrity of the internal circuitry and software validity.

- When Monitored:
With the ignition on.

- Set Condition:
The Humidity Sensor detects an internal failure.





REPLACE THE HUMIDITY SENSOR
1. Turn the ignition on.
2. With the scan tool, erase the DTCs.
3. Cycle the ignition from on to off three times.
4. Turn the ignition on and wait 30 seconds.
5. With the scan tool, read the DTCs.

Does the scan tool display: P1009-00-HUMIDITY SENSOR MODULE as active?

Yes

- Replace the Humidity Sensor. Humidity Sensor - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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. Body Verification Test.