Tire Pressure Sensor: Service and Repair
REMOVALTIRE REMOVAL
1. Deflate tire & remove balance weights.
CAUTION:
^ The tire bead should be broken approx. 90° from the valve side of the wheel. The bead breaker should not be set too deep.
^ Avoid tire/tool contact with the valve on dismount.
^ Dismount should end near the valve.
SENSOR REMOVAL
CAUTION: Handle the sensor with care.
1. Remove the valve nut.
CAUTION: The valve nut should not be re-used.
2. Discard the valve assembly.
INSTALLATION
SENSOR FIT
CAUTION:
^ Handle the sensor with care.
^ Avoid lubricant contact if possible.
1. Assemble valve to sensor and turn valve 3 times with the square part of the screw in the slot.
CAUTION:
^ The fit should not be tight i.e. it should still be possible to easily adjust valve angle.
^ Ensure that the wheel to be fitted is designed for sensor mount. There should normally be a mark to indicate this.
^ Ensure that the valve hole and mating face of the wheel are clean.
2. Mount assembly to wheel.
CAUTION: Ensure sensor feet are against the wheel throughout the remainder of the assembly process.
3. Tighten washer and nut by hand until the valve thread meets the nut built-in calibrated stop.
CAUTION: Ensure that the grommet remains in contact with the wheel
4. Using a torque wrench, tighten the nut to 2.95 ± 0.37 lb-ft (4.0 ± 0.5 Nm) It is normal to feel a break as the 1.7 lb-ft (2.3 Nm) calibrated stop in the nut snaps and the torque falls.
CAUTION:
^ Increase torque smoothly in order to achieve a clean break of the stop.
^ Do not exceed allowed torque.
^ Do not use electric or pneumatic tools.
TIRE FIT
CAUTION: Only use wheels designed to accommodate the TPMS sensor.
1. Lubricate the tire bead not the rim. Excessive lubrication should not be applied.
2. Start tire mounting approx. 5.9 in (15 cm) from valve.
3. Move the mounting tool away from the valve.
CAUTION: Avoid tire / tool contact with the valve.
4. Finish with mounting tool near to valve.
5. Carry out inflation / pressure correction and then fit valve cap.
SENSOR INITIATING PROCEDURE
1. Read the four sensor's ids starting with sensor 1 (1 normally front left, 2 front right, 3 rear left, 4 rear right).
NOTE:
^ It is possible to avoid registering each sensor by reading back the learned sensor list and only registering the new sensor in the missing sensor position (if there is a missing position).
^ The handheld test tool will automatically check to see whether the receiver is High or Low Line.
^ It will then automatically configure sensors accordingly and write their ID' s to the receiver memory.
^ Note that sensors which were already configured as Base (Low Line) will take longer to read.
2. Connect 'TPMS exciter' to the diagnostic connector.
3. Register the four sensor's ids to the receiver.
4. Disconnect diagnostic link.
5. Cycle Ignition, wait 3 minutes and check that Normal Receiver State is now indicated.
6. Let each road tire down and check that the system turns the TREAD lamp and correct wheel location LED on accordingly (wait up to 3 minutes). If it does not, then turn wheel a quarter turn and recheck.
7. In the case that re-check does not work, use the handheld tool to check that the correct ID has been registered for each wheel.