Modern Tire Dealer

APR 2017

Magazine for the professional tire industry

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MTD April 2017 TPMS chirp will sound. Turn the ignition switch to OFF position to exit the relearn procedure. Adjust all tire pressures to specification. Demounting/mounting procedures NOTE: If a vehicle's tires are replaced with those not having a TPC spec number, the TPMS may give an inaccurate low pressure warning. Non-TPC spec tires may give a low pressure warning that is higher or lower than the proper warning level achieved by TPC Spec numbered tires. When the wheels have been rotated, or a tire pressure sensor or RCDLR has been replaced, retrain tire pressure sensor. See "Reset procedures." Tire pressure sensor ere are currently two different kinds of TPMS sensors in use on the vehicles covered in this article. Identification of which sensor is in use can easily be made aer the tire has been removed from the wheel by referring to Figure 1 and Figure 2. Removal/installation 1) Raise the vehicle on a suitable support. Remove the tire/wheel assembly from the vehicle. 2) Demount the tire from wheel following the tire changer manufacturer's instructions while paying special aention to the fol- lowing to avoid damaging tire pressure sensor: • Place the sensor's cap and valve on a dry, clean surface aer removal. e cap is aluminum and the valve is nickel-plated to prevent corrosion. DO NOT substitute a cap or valve made of any other material. • Position the bead breaking fixture 90 degrees from valve stem when separating tire bead from wheel. • Position the mounting/demounting head so the tire iron (or pry bar) can be inserted slightly clockwise of sensor body when prying tire bead up and over the mounting/ demounting head. • Using a tire machine, rotate tire/wheel assembly clockwise when transferring the tire bead to the outside of the wheel rim. • Repeat items for the inner bead. 3) If the TPMS sensor is the clamp-in style (see Figure 1), follow clamp-in style removal as follows. If it is a snap-in style (see Figure 2), follow the Snap-in Style Removal below. Clamp-in style sensor removal 1) Remove the tire pressure sensor nut (see Figure 1). Figure 2: Exploded view of a snap-in style tire pressure sensor. Figure 3: Installation of a snap-in sensor/valve assembly. Quik-Link: 800-687-1557 ext. 14132 64

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