TPMS Transmitter Removal and Installation

REMOVAL AND INSTALLATION

CAUTION:

- Ensure valve cap is always in place except when adjusting tire pressure.
- If the valve core and valve cap are replaced, use a genuine replacement part. The valve core is similar to a conventional one, but uses nickel plating to avoid corrosion.
- Relieve tire pressure by removing the valve nut rather than by removing the valve core.
- Replace the valve stem grommet with a new one every five years or when the tire is replaced. Each TPMS transmitter have the corresponding grommet, so you must use them with correct combination.
- If you shake the TPMS transmitter, you can hear a rattle, but this is not a failure. It is normal.
- Do not drop the TPMS transmitter from height greater than 1 meter (3.3 feet).
- Do not expose the TPMS transmitter to extraneous magnetic fields.
- TPMS transmitter should not be stored at temperatures above 80°C (176°F).
- TPMS transmitter should not be exposed to temperatures above 100°C (212°F).
- If the TPMS transmitter is replaced, execute "Tire Pressure Sensor ID Registration" on scan tool MB991958 "Special Function."
- After you install the TPMS transmitters, you should drive the vehicle for half a minute at a speed of 30 miles or more per hour, or transmitter cause the excessive battery consumption. This is because there transmitter's "special mode". Transmitters change into this more only after installation and tire inflation, and in this mode there transmit every 30 seconds till the transmitter detect the vehicle's moving.













REMOVAL SERVICE POINTS

[[A]] VALVE CAP/VALVE NUT REMOVAL

1.
CAUTION:
Ensure valve cap is always in place except when adjusting tire pressure.

Remove the valve cap.

2. Rotate tire so that valve stem is in the 6 o'clock position.

3. Use a long-reach 17.2 mm (0.68 inch) socket to unscrew the valve nut a few turns.
Slowly push valve stem into tire so that tire pressure is relieved.

4. Once tire pressure is relieved, remove the valve nut.

[[B]] TPMS TRANSMITTER REMOVAL





1. Place on tire changing machine and break both tire beads ensuring that the transmitter remains in the bottom of the tire.
2.
CAUTION:
Be careful not to damage the TPMS transmitter.

Lubricate tire well and remove outer side of the tire.
3. Reach inside the tire and remove the TPMS transmitter.
4. Remove tire from rim using proper tire changing equipment procedures.

[[C]] GROMMET REMOVAL

CAUTION:
Use a soft tool to remove the grommet to prevent scratching the valve of the TPMS transmitter.

Remove the grommet from the TPMS transmitter.

INSTALLATION SERVICE POINTS

]]A[[ GROMMET/TPMS TRANSMITTER/VALVE NUT INSTALLATION





1. Slide inner tire bead over rim face. Use lubricant, as normal procedures require.
2. Install a new grommet to the TPMS transmitter.





3.
CAUTION:

- Visually check that TPMS transmitter is not deformed or damaged.
- When installing the TPMS transmitter, be sure the rim, grommet and valve nut are clean.
- Ensure the grommet is located inside the valve hole before installing the valve nut.
- While installing the valve nut, hold the valve and grommet firmly in contact with the rim.
- While installing the valve nut, ensure the tool is kept aligned to the valve and the valve hole.
- After installing the valve nut, check that the grommet is compressed.

Mount TPMS transmitter valve through rim hole as illustrated. Both holes in the transmitter case should face away from center of rim. Tighten valve nut finger tight, then slowly torque the valve nut to 5.5 ± 0.5 Nm (49 ± 4 in-lb).
4.
CAUTION:
Install the TPMS transmitter correctly. If the TPMS transmitter is installed incorrectly, it may not work correctly, or become damaged when the tire is installed.

Check that the TPMS transmitter is correctly assembled (Refer to illustration).

- One side of lower lip of the TPMS transmitter case can touch the rim after torquing.
- Except for the grommet, valve nut and lower lip of the TPMS transmitter, no other part of the front of the TPMS transmitter case should be touching the rim.

]]B[[ TIRE BEAD MOUNTING





1. Place wheel and tire on turntable of tire mounting machine. Ensure that transmitter is 270 degree angle (3 o'clock position) from mounting head when the outer tire bead is mounted as illustrated.
2. Lubricate tire well and mount outer tire bead as normal. Ensure that tire does not rotate during mounting.

]]C[[ TIRE PRESSURE INFLATION/VALVE NUT RETIGHTENING

CAUTION:
After tire inflation, retighten the valve nut 5.5 ± 0.5 Nm (49 ± 4 in-lb). This is necessary, because the TPMS transmitter is secured to the wheel with the valve nut and rubber grommet. The rubber grommet will be depressed by tire pressure or deteriorate over a period of time, which requires the valve nut to be retightened.

Inflate tire to required pressure, then retorque the valve nut to 5.5 ± 0.5 Nm
(49 ± 4 in-lb).