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Tyre Defect Indicator: Electronic system lights a warning symbol in the instrument panel (supplemented by a warning system in some models) in the event of tyre damage. If the pressure in a tyre drops, the tyre’s radius shrinks and, as a result, the wheel rotation speed rises.
| Tyre Defect Indicator (TDI) (not to be confused with Turbo Diesel Injection acronym ) uses sensors to monitor the rate at which the wheels rotate and the Anti-lock Braking System, ABS, compares the data for individual wheels.
This means that TDI recognises pressure loss when one wheel is rotating at a different speed to the others. An even loss of pressure in two or more wheels (natural diffusion) is not registered, so regular checkups are the best way of keeping your tyres in good condition. TDI needs to be initialised in order to function correctly. | |
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