FastCheck
75
TPMS Trouble shooting
If a valve appears to not respond when stimulated with a TPMS Valve Activator Tool,
check the following:
• The tyre valve is a TPMS valve.
• The TPMS activator tool is not pointing directly at the valve stem. The valve stem
is metal and will prevent a good RF signal. On low profile tyres, the area for the RF
to penetrate the tyre sidewall is small, carefully aim the TPMS Valve Activator Tool
half-way between the tyre rim and the tread.
• Check the batteries are not low in the TPMS Valve Activator Tool and the TPMS
valve.
• If there is no response from the valve after the checks have been made then it could
be that the TPMS valve itself is faulty.
Manual TPMS Process
BMW
Run-flat Reset (RPA – Tyre Deflation Detection)
The run-flat system monitors the pressure in the four mounted tyres while the vehicle
is being driven.
The system will provide an alert whenever the inflation pressure in a tyre drops
significantly in relation to the pressure of another tyre.
The following BMW vehicles have the RPA system fitted:
BMW 3 Series (E90/E91/E92/E93)
BMW 5 Series (E60/E61)
BMW 7 Series (E65/E66/E67/E68)
BMW X3 (E83)
BMW X5 (E53)
It is necessary to initiate the RPA reset process IMMEDIATELY after every tyre
pressure correction, after a tyre or wheel change or after a trailer has been attached
or detached. The reset MUST be started before driving the vehicle for the first time
after one of the above events.
When a reset is required (due to a pressure change in one of the tyres) the vehicle will
inform the driver by turning on the RPA Warning Lamp, which will glow red, and
sounding an acoustic signal.
When the RPA Warning Lamp is on but the colour is yellow this indicates that the RPA
system has failed or is malfunctioning. In this case the system must be diagnosed
using the scan function of the service tool.
The RPA reset process can be started in two different ways depending on the model.
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