| If the wheels are changed (e.g. switch from summer to winter tyres), the wheel electronics transmit data as soon as the speed of the new wheels exceeds 25 km/h. The new wheel electronics' ID numbers are automatically detected and entered by the control unit. |
| The acceleration data are additionally checked against the vehicle speed. This process takes approx. 7 minutes. |
| The tyre pressure monitor control unit -J502- must first switch to learning mode before it can automatically learn the wheel electronics. |
| To do this, the vehicle must remain stationary for 20 minutes. Following the detection of a flat tyre, this time is 5 minutes. |
| If the stationary time is not maintained and the control unit consequently does not switch to learning mode, the system detects interference in transmission and will learn the wheel electronics automatically only after a stationary period of 20 minutes. |
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| When changing wheels, note that only Volkswagen-approved wheel and tyre combinations with the tyre inflation pressure specified in the tank flap may be installed. |
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| If unapproved wheel and tyre combinations are installed, they must possess a certificate from the responsible technical inspection authority (in Germany, TÜV) for the respective vehicle, and a second wheel set must be learned via the Vehicle diagnostic, testing and information system -VAS 5051B- → . |
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| Learning is also necessary if the tyre inflation pressure deviates from the tyre inflation pressure specified in the tank flap → . |
| If a vehicle is fitted with tyres requiring nominal tyre inflation pressures other than those specified on the tank flap sticker, these tyres (second wheel set) can also be monitored with the TPM system. |
| Nominal tyre inflation pressures for the second wheel set must be specified to the system with the Vehicle diagnosis, testing and information system -VAS 5051B-. |
| The wheel electronics for the wheels of the second wheel set are not automatically detected and learned by the TPM system (unlike the wheel electronics for the wheel set with Volkswagen-approved wheel and tyre combinations). |
| The following work has to be performed to switch to the second wheel set: |
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| Read ID numbers (IDs) of the wheel electronics (tyre pressure sensors) prior to installation. |
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| Switch the TPM to wheel set 2. |
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| Enter the necessary nominal tyre pressures and the IDs of the wheel electronics in the system. |
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