Symptom Related Diagnostic Procedures

*LOW TIRE PRESSURE INDICATOR LIGHT ON (WITH NO DTC'S)





When Monitored and Set Condition

- When Monitored: With the ignition ON.
- Set Condition: The Tire Pressure Monitor (TPM) module will illuminate the Low Tire Pressure Indicator Lamp if the tire pressure is too low or the sensors have gone into a sleep mode.





For a complete Tire Pressure Monitor Circuit Diagram Schematics and Diagrams.

Diagnostic Test

1. LOW TIRE PRESSURE INDICATOR LIGHT
NOTE: The Low Tire Pressure Indicator Lamp will illuminate if the TPM module detects low tire pressure in one or more of the vehicle tires. Also, the TPM module will turn the light on if the module detects a lose of signal from one or more of the Tire Pressure Sensors/Transmitters during stop and go driving.

Turn the ignition OFF.
Inspect the tires for proper air pressure (refer to Tire Placard located in door opening).
Ensure the air pressure is properly set in ALL tires.
Turn the ignition ON.
Connect the scan tool to the vehicle.
With the scan tool, select "Chassis System".
With the scan tool, select "Input / Output".
Verify the Tire Status of all tires (should be "NO" movement while parked).
With an available assistant, drive the vehicle at 40 km/h (25 MPH) for at least 2 minutes and monitor the Tire Status of all tires.

NOTE: The Tire Status must change when the vehicle is driven. The static reading will be "NO", and the dynamic reading will change to "YES".

If the Tire Sensors/Transmitters are operating properly, the following status will be displayed:

- LF TIRE MOVING: YES
- RF TIRE MOVING: YES
- RR TIRE MOVING: YES
- LR TIRE MOVING: YES
- ALL TIRES MOVING: YES

Are all the Tire Sensors/Transmitters reporting a YES status?

YES

- The TPM system is functioning properly.

NO

- Refer to the indicated tire to repair the sensor.