WABCO OptiTire, System Description

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66
Workshop notes Workshop notes
10.2.6 No signal received from the sensor
Battery life
An internal lithium battery supplies the sensor with power.
For reasons relating to mechanical stress and tightness, the battery is coated
within the sensor and cannot be exchanged.
The battery life-time depends on certain factors. Under normal operating
conditions the life of the battery will be up to 9 years.
Since significant pressure deviation increases transmission frequency for short-
term warning, frequent pressure changes cause a shorter life time.
!
The replacement required due to a weak battery will be indicated around half a
year before the end of is life. A corresponding entry in the diagnostic memory
will be seen.
Checklist for sensor
– If the warning "no reception wheel module" is repeated often in the WABCO
Display

see page 60, you can use the checklist to determine if the
sensor should be replaced.
– Copy in this table line per line the default value to the "Result" column if the
description matches.
– Total the standard values in the "Result" column.
You will find more information on your items in the section "Test result"

see
page 67.
!
Ensure while troubleshooting that the vehicle is not in vicinity of high-frequency
radiation

see chapter "5.1.1 The external sensor (WM2)" on page 23.
Checklist
NO. DESIGNATION DEFAULT RESULT
1a Warning "No reception" is not active but
stored in diagnostic memory (fault shown
blue in diagnosis).
0
1b Warning "No reception" is active (fault
shown in red in diagnosis).
2
2a Warning "no reception" appears for one
sensor.
0
2b Warning "no reception" appears for several
sensors.
3
3a The age of the sensor (according to the
engraved production date in format WW/
YY) is less than 5 years.
0
3b The age of the sensor lies between 5 and
7 years.
4
3c The age of the sensor is more than 7
years.
8
4a The average outside temperature was
around -20 °C while occurrence of the
failure
0