Tire Monitoring System: Service and Repair

The Low Tire Warning Indicator

The low tire pressure monitoring system detects a significant loss of inflation in a single wheel by utilizing the anti-lock brake system (ABS) to monitor the wheel speed sensors for small changes in wheel speed, indicating a low tire. Upon initialization, the low tire pressure monitoring system records the relative wheel speeds of the vehicle for future reference. During operation, the system compares the current vehicle wheel speeds to the recorded wheel speeds. If a tire loses air pressure with respect to the other tires, the ABS module will send a signal via the standard corporate protocol (SCP) network to the instrument cluster and illuminate the low tire warning indicator.

Following the correction of a low tire, the system must be re-initialized. Place the ignition switch in the ON position, press the odometer/trip odometer button 2 times until the display reads "TIRE RESET" or "CHECK TIRES AND RESET". Press and hold the odometer/trip odometer button for approximately 3 seconds until the low tire warning indicator flashes 3 times, indicating the system is initializing.