Quick Check Of TPMS
Some car models and model years require that you are more accurate when aiming the diagnostic tool at the sensor for an activation to succeed. If an activation fails, realign the diagnostic tool and perform the activation again. First after three (3) failed activation attempts can a sensor be regarded as defective.
The system can be checked, using the diagnostic tool, by activating a readout at the same time as activating the sensors using a special tool. The special tool is positioned against the tire where the sensor is located at the same time as the button on the special tool is depressed. The special tool then transmits a signal that activates the sensor so that it starts to send signals to the central electronic module (CEM). The activated sensor ID number and tyre pressure is then shown in the display of the diagnostic tool. Note the sensor's id-number and its position.