Tire Pressure Sensor: Service and Repair
TIRE PRESSURE WARNING VALVE AND TRANSMITTERCOMPONENTS:
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE REAR WHEEL
3. REMOVE GRAND SPARE TIRE (w/ Grand spare tire)
4. REMOVE TIRE PRESSURE WARNING VALVE SUB-ASSEMBLY
(a) Remove the valve core and cap, and release the air from the tire.
(b) After ensuring that a sufficient amount of air has been released, remove the nut and washer that is used to secure the tire pressure warning valve and transmitter drop the tire pressure warning valve and transmitter inside the tire.
HINT:
Keep the removed cap, valve core, nut and washer.
(c) Disengage the bead using the shoe of a tire remover.
NOTICE:
Be careful not to damage the tire pressure warning valve and transmitter due to interference between the sensor and tire bead.
(d) Remove the bead on the upper side.
(e) Take out the tire pressure warning valve and transmitter from the tire and remove the bead on the lower side.
HINT:
Check that no cracks or damage are identified on the grommet. If any damage is found, replace the grommet, washer and nut.
INSTALLATION
1. INSTALL TIRE PRESSURE WARNING VALVE SUB-ASSEMBLY
(a) Insert the tire pressure warning valve into the valve installation hole 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 tire pressure warning valve and transmitter.
^ Check that there is no foreign matter on the inner grommet and around the rim hole.
^ If the tire pressure warning valve and transmitter is installed in the reverse direction, it may be damaged or fail to transmit signals when running at high speeds.
^ If the installing a new tire pressure warning valve and transmitter, write down the ID number before installation.
^ It is necessary to register the ID in the ECU after installation.
(b) Install the washer on the tire pressure warning valve from the rim side and tighten the nut.
Torque: 4.0 N*m (41 kgf*cm, 35 in.*lbf)
NOTICE:
^ No apply after tightening with specified torque.
^ Check that there is no foreign matter on the washer and nut.
^ If the tire and tire pressure warning valve have been removed, check the grommet for damage (such as visible cuts) and foreign matter (such as mud, dirt or sand). Replace the grommet with a new one if any of the defects mentioned above are found.
^ Check that there is no oil, water or lubricant around the rim hole, tire pressure warning valve, washer and nut. Failing to do so may result in improper installation.
(c) Set the wheel disc to a mounting machine and install the lower tire bead. Position the main body of the tire pressure warning valve and transmitter in the shaded area as shown in the illustration.
NOTICE:
If the tire pressure warning valve and transmitter is positioned outside this area, it will interfere with the tire bead, and may cause damage to the tire pressure warning valve and transmitter. If the use of lubricant is required when installing the bead, do not apply the lubricant directly to the tire pressure warning valve and transmitter.
(d) Install the upper bead.
NOTICE:
Make sure that the tire bead and tool do not interfere with the main body of the sensor and that the sensor is not clamped by the bead.
(e) Inflate the tire. If the valve nut is 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 in.*lbf)
NOTICE:
No apply after tightening with specified torque.
2. INSTALL FRONT WHEEL
Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)
3. INSTALL REAR WHEEL
Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)
4. INSPECT TIRE
(a) Inspect the tire.
5. REGISTER TRANSMITTER ID
(a) Register the transmitter ID.
6. INSPECT TIRE PRESSURE WARNING SYSTEM
(a) Inspect the tire pressure warning system.
DISPOSAL
HINT:
The tire pressure monitor valve is powered by a lithium battery. When disposing of the tire pressure sensor, remove the battery and dispose of it correctly.
1. DISPOSE OF TIRE PRESSURE WARNING VALVE SUB-ASSEMBLY
(a) Use the tip of a screwdriver to pry off the back cover.
(b) The battery and base board covered with resin are exposed. While taking out the battery, cut the 2 terminals that connect the battery to the base board.