Tire Pressure Sensor: Service and Repair

REMOVAL
1. Remove tire and wheel assembly from vehicle.

CAUTION: The cap used on this valve stem contains an O-ring seal to prevent contamination and moisture from entering the valve stem. Retain this valve stem cap for reuse. Do not substitute a regular valve stem cap in its place.

CAUTION: The valve stem used on this vehicle is made of aluminum and the core is nickel plated
brass. The original valve stem core must be reinstalled and not substituted with a valve stem core
made of a different material. This is required to prevent corrosion in the valve stem caused by the different
metals.

2. Dismount tire from wheel following tire changer manufacturers instructions while paying special attention to the following to avoid damaging the pressure sensor:
a. When breaking the tire bead loose from the wheel rim, avoid using the Bead Breaker in the area of the sensor. That includes both front and rear beads of the tire.







b. When preparing to dismount the tire from the wheel, carefully insert the mounting/dismounting tool at the valve stem + 10° , then proceed to dismount the tire from the wheel. Use this process on both the upper and lower tire beads.







3. Using a thin wall socket, remove special nut retaining sensor to wheel.
4. Remove sensor from wheel.


INSTALLATION

NOTE: Before reinstalling a tire pressure sensor, replace sealing grommet at base of valve stem.

1. Wipe area clean where sensor sealing grommet contacts wheel. Make sure surface of wheel is not damaged.
2. Install sensor in wheel as shown. Do not attempt to mount sensor otherwise, damage may occur.
3. Using a thin wall socket, install special sensor nut. Tighten nut to 4 Nm (35 in. lbs.) torque.

CAUTION: Over-torquing the sensor nut by as little as 12 Nm (106 in. lbs.) may result in sensor separation from the valve stem. Under this condition, the sensor may still function, however, the condition should be corrected immediately.

4. Mount tire on wheel following tire changer manufacturers instructions, paying special attention to the following to avoid damaging tire pressure sensor:







a. Rotating Wheel Tire Changers - Once the wheel is mounted to the changer, position the sensor valve stem approximately 210° from the head of the changer in a clockwise direction before rotating the wheel (also in a clockwise direction) to mount the tire. Use this procedure on both the upper and lower tire beads.







b. Rotating Tool Tire Changers - Position the wheel on the changer so that the sensor valve stem is approximately 210° from the head of the changer in a clockwise direction from the mounting end of the tool. Make sure the sensor is clear of the lower bead breaker area to avoid damaging the sensor when the breaker rises. Rotate the tool in a counterclockwise direction to mount the tire. Use this procedure on both the upper and lower tire beads.
5. Install wheel and tire assembly on vehicle.
6. Retrain tire pressure sensors.