Tire Pressure Sensor: Service and Repair

WHEEL UNIT REMOVAL/INSTALLATION

1. Remove the valve core and valve core, and bleed the air out of the tire.

2. Remove in the order indicated in the table.

3. Install in the reverse order of removal.

4. Install the valve core and valve cap, put air into the tire.

CAUTION:
- A TPMS wheel unit has an exclusive valve core. If a valve core other than the exclusive one is installed, the wheel unit could be damaged due to the generation of rust. Always install the exclusive valve core for TPMS.
- To prevent damage to the valve area of the wheel unit or charging loss during air pressure adjustment, use a type B tool with a round end as shown in the figure, not a type A tool.






5. When replacing wheel unit (s), register the new wheel unit ID (s). Programming and Relearning
NOTE:
- If the wheel unit is replaced with a new one, the ID registration must be performed. When the ID registration is finished, the data for the new wheel unit is displayed on the M-MDS.










Wheel Unit Component Removal Note

1. Set the bead breaker at the position laterally opposed to the valve.






2. Break the bead loose.

CAUTION:
- Do not break the bead loose within the range of 45° on each side of the valve. Otherwise, the wheel unit could be damaged.

3. Break the bead loose on the other side of the wheel.






CAUTION:
- Set the bead breaker at the position laterally opposed to the valve.
- Do not break the bead loose within the range of 45° on each side of the valve. Otherwise, the wheel unit could be damaged.

4. Insert the tire lever at the point 40 mm {1.6 in} from the wheel unit in the direction that the tire changer turntable rotates.






5. Remove the bead from the wheel.
NOTE:
- Using the tire lever as a support will aid in preventing the tire changer arm from deviating from the point at which the bead is first broken.






6. For the other side, insert the tire lever at the point of 40 mm {1.6 in} from the wheel unit in the direction that the tire changer turntable rotates, and remove the bead from the wheel.

7. Remove the wheel unit.

Wheel Unit Component Installation Note

1. Insert the wheel unit valve into the valve hole so that the polyurethane foam side faces the rim.






NOTE:
- Maintain the wheel unit in contact with the rim, then start manually to screw the valve nut for a few turns.

2. Install the nut from the outer side of the wheel.

3. Tighten the valve nut slowly (15 rpm max.) to 8.0 Nm {82 kgf-cm, 71 in-lbf} in one rotation.

CAUTION:
- Do not retighten the valve nut after the initial operation.

4. Set the tire at the point A (45° away from the valve hole), and install the tire.






5. Set the tire at the point A (45° away from the valve hole).






NOTE:
- Using the tire lever as a support will aid in preventing the tire from deviating from the point A.

6. Install the tire.