Instrument Cluster Indications

ITEM	DESCRIPTION
1	Low tire pressure warning indicator
2	Message center

The warning indications to the driver are common on all vehicles fitted with TPMS. The driver is alerted to system warnings by a low tire pressure warning indicator in the instrument cluster and an applicable text message in the message centre.

The TPMS module passes system status information to the instrument cluster on the medium speed CAN bus. The instrument cluster converts this data into illumination of the warning indicator and the display of an appropriate message.

When the ignition is switched on, the warning indicator is illuminated for 3 seconds for a bulb check.

NOTE: If the vehicle is not fitted with the TPMS, the warning indicator will not illuminate.

The instrument cluster checks, within the 3 second bulb check period, for a CAN bus message from the TPMS. During this time the TPMS performs internal tests and CAN bus initialization. The warning indicator will be extinguished if the TPMS module does not issue a fault message or tire pressure warning message.

If a TPMS fault warning message is detected by the instrument cluster at ignition on, the warning indicator will flash for 72 seconds after the 3 second bulb check period and then remain permanently illuminated.

If a tire pressure warning message is detected by the instrument cluster at ignition on, the warning indicator will extinguish briefly after the 3 second bulb check period, before re-illuminating to indicate a tire pressure warning.

The following table shows the warning indicator functionality for given events:

EVENT	INSTRUMENT CLUSTER INDICATIONS
Low pressure warning limit reached in one wheel	Warning indicator illuminated. 'CHECK TIRE PRESSURE' message displayed and applicable tire highlighted on display.
Low pressure warning limit reached in one or more wheels in low speed mode (only if programmed or learning)	Warning indicator illuminated. 'CHECK ALL TIRE PRESSURES' message displayed.
TPMS fault	Warning indicator flashes for 72 seconds and is then permanently illuminated. The flash sequence repeats after ignition on cycle. 'TIRE PRESSURE SYSTEM FAULT' message displayed.
No transmission from a specific tire pressure sensor or Specific tire pressure sensor fault	Warning indicator flashes for 72 seconds and is then permanently illuminated. The flash sequence repeats after ignition on cycle. 'TIRE NOT MONITORED' message displayed.
No transmission from more than one tire pressure sensor or more than one tire pressure sensor fault	Warning indicator flashes for 72 seconds and is then permanently illuminated. The flash sequence repeats after ignition on cycle. 'TIRE PRESSURE SYSTEM FAULT' message displayed.
CAN (controller area network) signals missing	Warning indicator flashes for 72 seconds and is then permanently illuminated. The flash sequence repeats after ignition on cycle. 'TIRE PRESSURE SYSTEM FAULT' message displayed.
Vehicle enters high speed mode (only available in certain markets)	Warning indicator illuminated. 'TIRE PRESSURE LOW FOR SPEED' message displayed.