Tire Pressure Sensor: Service and Repair
TIRE PRESSURE WARNING VALVE AND TRANSMITTERCOMPONENTS:
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE REAR WHEEL
3. REMOVE TIRE PRESSURE WARNING VALVE SUB-ASSEMBLY
(a) Remove the valve core and cap, and release air from the tire.
(b) After ensuring that air is sufficiently released, remove the nut and washer that are used to fix the tire pressure warning valve and drop the valve sensor inside the tire.
HINT: Keep the removed cap, valve core, nut and washer.
(c) After dropping the tire pressure warning valve into the tire, disengage the bead using the shoe of the tire remover.
NOTICE: Be careful not to damage the tire pressure warning valve because of interference between the sensor and tire bead.
(d) Remove the bead on the upper side.
(e) Take out the valve sensor from the tire and remove the bead on the lower bead.
HINT: Check that there are no cracks or damage on the grommet. If any damage is found, replace the grommet together with the washer and nut.
INSTALLATION
1. INSTALL TIRE PRESSURE WARNING VALVE SUB-ASSEMBLY
(a) Insert the tire pressure warning valve into the valve installation hole. Insert it from the inside of the rim so that the print surface can be seen.
NOTICE:
^ Check that there is no visible deformation, damage or other abnormalities on the transmitter.
^ Check that there is no foreign matter on the inner grommet and around the rim hole.
^ If installed in the reverse direction, the tire pressure warning valve may be damaged or fail to transmit signals when running at high speed.
^ If installing a new tire pressure warning valve, write down the ID number before installation.
^ It is necessary to register the ID in the ECU after installation.
(b) Set the washer on the tire pressure monitor valve rim side. Tighten the tire pressure warning valve with the nut.
Torque: 4.0 N*m (41 kgf*cm, 35 inch *lbf)
NOTICE:
^ Check that there is no foreign matter on the washer and nut.
^ If the tire pressure warning valve is removed when the tire is removed for replacement, check that there is no damage or cuts, and no foreign matter such as mud, dirt or sand attached to the grommet. Replace the grommet with a new one if necessary.
^ Check that there is no oil, water or lubricant around the rim hole, tire pressure warning valve, washer and nut. Failing to check may result in improper installation.
(c) After the tire is inflated, the valve nut may be loose. Retighten the nut to the specified torque and then check for air leaks with soapy water.
Torque: 4.0 N*m (41 kgf*cm, 35 inch *lbf)
(d) Set the wheel disc to the mounting machine and install the lower tire bead. Position the main body of the valve sensor as in the shaded area shown in the illustration.
NOTICE: If the valve sensor is positioned outside this area, it generates interference with the tire bead, and may cause damage to the valve sensor.
(e) Install the upper bead.
NOTICE: Make sure that the tire bead and tool do not interfere with the main body of the valve sensor and that the valve sensor is not clamped by the bead.
2. INSTALL FRONT WHEEL
Torque: 131 N*m (1,340 kgf*cm, 97 ft.*lbf)
3. INSTALL REAR WHEEL
Torque: 131 N*m (1,340 kgf*cm, 97 ft.*lbf)
4. INSPECT TIRE
5. REGISTER TRANSMITTER ID
6. INSPECT TIRE PRESSURE WARNING SYSTEM
DISPOSAL
HINT: The tire pressure monitor valve is powered by a lithium battery. When disposing of the tire pressure monitor valve, remove the battery and dispose of it correctly.
1. DISPOSE OF TIRE PRESSURE WARNING VALVE SUB-ASSEMBLY
(a) Using a screwdriver, pry off the cover. Remove the back cover.
(b) The battery and base board covered with resin are exposed. While taking out the battery, cut the 2 terminals which connect the battery and base board.