SAIC MG 6, Service Manual

Page: 270 / 357

Starting & Driving
Tyre Pressure Monitoring System
(TPMS)
The TPMS is not a substitute for checking
tyre condition and pressures.
Note: The TPMS warns of low tyre pressures, it does
not re-inflate the tyres.
System Operation
The system is controlled by the ABS system, which
constantly monitors the speed of each wheel. If, during
normal driving conditions with the brakes not applied, the
ABS detects that one wheel is rotating slower than the
others, it deduces that the pressure of that tyre has fallen
below the predefined limit of the system. As a result, the
warning light on the instrument pack will always illuminate
yellow.
Note: When blowing occurs, it need some time to
check before the warning light illuminate.
Check your tyres at the earliest opportunity and reinflate
to the correct pressures. Refer to ‘Tyre Pressures (Cold)’
in ‘Technical Data’.
System Faults
The system is self monitoring, and if a fault is detected, the
warning light on the instrument pack will twinkle for 90
seconds and then always illuminate yellow.
The warning light may warn error or not illuminate even if
the tyre pressure change in the following conditions:
• Driving on snowy or wet surface.
• Front axle slip or latitude acceleration too much.
• Snow chain is fitted.
• Not recommended tyre is fitted.
• Not reset TPMS after replace tyres.
• Not reset TPMS after pump up the tyres or let down
the tyres.
• Rough terrain driving for excessive periods.
• Bending or mountain type terrain driving for excessive
periods.
• Excessive luggage weight change from when last reset
carried out.
252