Spare Tire Identification

Depending on the vehicle specification, the spare tire may or may not be fitted with a tire pressure sensor.

NOTE: Tire pressure sensors cannot be fitted to steel space saver spare wheels.

If the spare tire is fitted with a tire pressure sensor, the central junction box (CJB) can detect it, determine that it is the spare tire and monitor its pressure and issue warnings to the driver accordingly. If the central junction box (CJB) expects the spare tire to be fitted with a tire pressure sensor and it does not, the central junction box (CJB) will not show a fault to the driver, however a fault code will be stored in the central junction box (CJB).

If the spare tire is being monitored and the driver replaces a flat 'running' tire with the spare tire, the central junction box (CJB) will not continually warn the driver that the original flat tire (now in the spare position) is flat. This prevents distraction of the driver by constant pressure warnings being issued. The driver is reminded by a message displayed for 20 seconds at each ignition on cycle that the spare tire is flat.