Modern Tire Dealer

APR 2017

Magazine for the professional tire industry

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MTD April 2017 TPMS 2) Remove the sensor from the wheel hole. 3) Remove the sensor grommet from valve stem. 4) Follow clamp-in sensor installation, to replace the sensor. Snap-in style sensor removal 1) Remove the Torx screw (3) from the tire pressure sensor (2) and pull it straight off the tire pressure valve stem (1) (see Figure 2). 2) Remove the tire pressure valve stem by pulling it through the rim. 3) Follow snap-in style sensor installation below, to replace the sensor. Clamp-in sensor installation 1) Clean any dirt or debris from the grommet sealing areas. Install grommet on sensor valve stem. 2) Insert the sensor in the wheel hole with the air passage facing away from the wheel. 3) Install a sensor nut, and position the sensor body parallel to the inside wheel surface while tightening nut to 62 in.-lbs. (7 N.m). 4) Before installing tire on the wheel, note the following items to avoid tire pressure sensor damage upon tire mounting: • Position the mounting/dismounting head 180 degrees from the valve stem. Position the bead transition area 45 degrees counterclockwise of the valve stem. • Using a tire machine, rotate the tire/wheel assembly clockwise when transferring the tire bead to the inside of the wheel rim. Repeat these steps for the outer bead. 5) Install the tire on the wheel. Install the tire/wheel assembly on the vehicle. Retrain the tire pressure sensor. See "Reset procedures." NOTE: A service replacement tire pressure sensor is shipped in the OFF mode. In this mode, the sensor's unique identification code cannot be learned into the RCDLR's memory. e sensor must be taken out of the OFF mode by spinning the tire/wheel assembly above 25 mph (40 km/h) for at least 10 seconds in order to close the sensor's internal roll switch. Snap-in style sensor installation 1) Assemble the tire pressure sensor (2) to the valve stem and install the new Torx screw (3) (see Figure 2). 2) Apply tire soap to the rubber portion of the valve stem. 3) Using a tire valve stem mounting tool, pull the valve stem through in a direction parallel to the valve hole on the rim. 4) Before installing tire on the wheel, note the following items to avoid tire pressure sensor damage upon tire mounting: • Position the mounting/demounting head 180 degrees from the valve stem. Position the bead transition area 45 degrees counterclockwise of the valve stem. • Using a tire machine, rotate the tire/wheel assembly clockwise when transferring tire bead to the inside of the wheel rim. • Repeat these items for the outer bead. 5) Install tire on wheel. Install tire/wheel assembly on vehicle. Retrain the tire pressure sensor. See "Reset procedures." NOTE: Snap-fit TPMS sensors are still shipped in the OFF mode. However, the TPMS no longer needs to be spun to remove it from the OFF mode. e sensor will exit its OFF state when the tire is inflated. e technician can then program the vehicle as normal. ■ Information for this column comes om Mitchell 1's "Tire Pressure Monitoring Systems Guide" for domestic and import vehicles. Headquartered in Poway, Calif., Mitchell 1 has provided quality repair information solutions to the automotive indus- try for more than 80 years. For more information, visit www.mitchell1.com. For archived TPMS articles, visit www.moderntiredealer.com. Torque specifications Component Ft.-lbs. (N.m) Spare tire hoist retaining bolt 30 (40) Wheel nut 140 (190) In.-lbs. (N.m) Clamp-in sensor nut 62 (7) Snap-in sensor Torx screw 11.5 (1.3) Quik-Link: 800-687-1557 ext. 14134 66

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