Installation Instructions

MAINTENANCE
114
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23 MAINTENANCE
23.1 SOLVING COMMON PROBLEMS
23.1.1 Sensors diagnosis
If an error is detected by the self-diagnosis of the system, refer to the following table as a guide on how to solve the
problems.
Error detected Description Possible solution
Communication Error
The CPU does not communicate
with the HUB or the HUB does not
communicate with one or more
sensors.
 Check the data connection cables between the CPU
and the HUB, and between the HUB and the sensors
in error.
 For M12 connectors, check for correct tightening.
 Replace the cables if they are damaged.
 If all the sensors are in error, there may be a problem
between the CPU and the HUB; if this is the case, also
check if the HUB is correctly powered (see section
6.3.4).
Microwave Error
The power level emitted by the
sensor is below the expected limit
and/or the reception sensitivity is
below the minimum threshold.
 The system could work anyway, but both tag
detection in the 'pre-warning' zone and the vehicle-
vehicle anti-collision function will be poor.
We therefore recommend contacting the support
centre.
Low Frequency Error
The power level emitted by the
sensor is below the expected limit
or the LF antenna is not connected.
 The system could work anyway, but tag detection in
the 'warning' zone will be poor.
 If the tags are not detected in the 'warning'
zone by a dedicated sensor, the LF antenna
inside may not be connected. Make sure that
the sensor is installed correctly (see section
8.3.3).
 Check that the LF antenna wire is not damaged;
disconnect the J3 connector and use a tester to
check that the resistance measured at the ends of
the connector is less than 4 ohm.
RF Sensor Error
The power level emitted by the
sensor is below the expected limit.
 The system could work anyway, but the vehicle-
vehicle anti-collision function will be poor.
 Check that the wire antenna connected to the
J9 connector (see section 8.3.3) is connected
and correctly anchored to the sensor housing.
If the error does not disappear, we recommend contacting the
support centre.
Radio frequency Error
The reception sensitivity of the HUB
is below the minimum threshold.
 The system could work anyway, but both tag
detection and the vehicle-vehicle anti-collision
function will be poor.
We recommend contacting the support centre.
23.1.2 Solution to common problems