Page 17 of 37
TYRE PRESSURE MONITOR
Fault finding - Configurations and programming
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
CF023:
TYRE PRESSURE MONITOR FUNCTION
(in programming command SC008 UCH type)
WRITING THE CONFIGURATION WITH OR WITHOUT TYRE PRESSURE MONITOR:
–Select the repair mode menu.
–Select the Programming menu
Select line SC008 UCH type, then the line CF023 Tyre Pressure Monitor function then with or without
Confirm the selection.
Check that the configuration has been stored correctly.
IMPORTANT
CONFIGURATION INCONSISTENCY BETWEEN THE INSTRUMENT PANEL AND UCH
1
st case: If the instrument panel detects the tyre pressure monitor system programmed in the UCH but
not in its own configuration. The message ELECTRONIC FAULT appears, the four wheels
disappear on the instrument panel display, and the Service warning light comes on.
2
nd case: The instrument panel detects that the Tyre pressure monitor is programmed in its own
configuration but the UCH fails to respond to any requests from the instrument panel (not
configured in UCH). The message TYRE SENSOR INOPERATIVE will appear, the four wheels
will disappear from the instrument panel display and the Service warning light will come on.
Edition 435B-16
Page 18 of 37
TYRE PRESSURE MONITOR
Fault finding - Configurations and programming
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
INSTRUMENT PANEL CONFIGURATION
CF016:
PAX SYSTEM TYRES
(in programming command SC008 UCH type)
IMPORTANT
This command is only available if CF023 Tyre pressure monitor has been configured "With" beforehand.
WRITING THE CONFIGURATION WITH
OR WITHOUT PAX SYSTEM TYRES:
–Select the Repair mode menu
–Select the Programming menu
–Select line SC008 UCH type, then the line CF016 PAX System tyres then with, without.
–Confirm the selection.
–Check that the configuration has been stored correctly.
If the vehicle is equipped with PAX System tyres and the customer would like to install non-PAX System winter
tyres:
–Deconfigure the PAX System option of the UCH using the command described
above
–Deconfigure the PAX System option of the instrument panel using command
CF145 Tyre pressure monitor described below.
Remember to reconfigure the UCH and the instrument panel when switching from winter tyres to summer
tyres.
CF145:
TYRE PRESSURE MONITOR
–After the multiplex network test, select Instrument panel.
–Select the Repair mode menu
–Select the Configure menu
–Select line CF045 Tyre pressure monitor then With, Without or With PAX.
–Confirm the selection.
–Make sure the configuration has been properly stored by checking the Read configuration menu at line LC056:
Tyre pressure monitor.
Edition 435B-17
Page 19 of 37
TYRE PRESSURE MONITOR
Fault finding - Conformity check
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50TYRE PRESSURE MONITOR
Fault finding - Conformity check
NOTESOnly check conformity after a complete check using the diagnostic tool.
Test conditions: Engine switched off, after ignition feed on, tyres inflated to correct
pressure.
Order Sub-functionParameter or Status
checked or ActionDisplay and notes Fault finding
1Tyre receiverET040:Tyre pressure
monitoring
systemACTIVE– In the event that
status ET040 is
INOPERATIVE, refer to
the interpretation of
status ET040.
ET037:Tyre pressure
appropriate for
speedYES, if the pressure is
appropriate for the
vehicle speed.– If status ET037 is NO,
consult the
interpretation of status
ET037.
PR008:Vehicle speedX = 0 (in km/h)If the vehicle speed signal
is incorrect, carry out fault
finding on the ABS.
ET036:Wheel
pressure
imbalanceNONE, if the pressures of
the two front-axle and two
rear-axle tyres are
balanced.
(pressure difference
between the two tyres on
the same axle < 0.5 bar)
⇒ Readjust the pressure.
– FRONT, if the
pressures of the two
front tyres are not
balanced.
– REAR, if the
pressures of the two
rear tyres are not
balanced.
– FRONT/REAR, if the
pressures of the two
front-axle and two rear-
axle tyres are not
balanced.
⇒ See the interpretation of
status ET036.
ET045:Radiofrequency
signal receivedNO– Status ET045
becomes YES when the
receiver integrated into
the UCH receives a
signal.
To check whether the
receiver is functioning
normally, carry out a door
locking request with the
card and check that the
status switches to YES.
SSPP_V48_CCONF/SSPP_V4C_CCONF/ SSPP_V4D_CCONF/SSPP_V4F_CCONF/SSPP_V50_CCONF
Edition 4
35B-18
Page 20 of 37
TYRE PRESSURE MONITOR
Fault finding - Conformity check
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
NOTESOnly check conformity after a complete check using the diagnostic tool.
Test conditions: Engine switched off, after ignition feed on, tyres inflated to correct
pressure.
Order Sub-functionParameter or Status
checked or ActionDisplay and notes Fault finding
1 (con-
tinued)Tyre receiverET032:Front left-hand
wheel valve
signalOK, if the valve sends the
right signal and the
pressure is correct.Check that the tyre
pressures are those
recommended in the
Workshop Repair Manual
Section 35
Specifications.
If statuses ET032 to
ET035 are not OK, see
the interpretation of
statuses ET032 to ET035. ET033:Front right-hand
wheel valve
signal
ET034:Rear right-hand
wheel valve
signal
ET035:Rear left-hand
wheel valve
signal
PR003:Front left-hand
wheel pressureX = Tyre pressure. If X = 0 bar, see the
interpretation of
parameters PR003 to
PR006.
Ensure that the
recommended pressure
values (PR009 to PR012)
are correct for your
vehicle.
Following a battery cut-off,
it is normal that all
temperature values
should be 50 °° ° °
C and
pressure values 0 bar.
Perform a road test so that
the valves emit their true
temperature and pressure
values.
It may be that the
temperatures of all the
tyres are not exactly the
same, depending on the
load distribution and
whether or not they are
exposed to sunlight. PR004:Front right-hand
wheel pressure
PR005:Rear right-hand
wheel pressure
PR006:Rear left-hand
wheel pressure
PR019:Front left-hand
tyre temperatureX = Tyre air temperature
PR020:Front right-hand
tyre temperature
PR021:Rear right-hand
tyre temperature
PR022:Rear left-hand
tyre temperature
Edition 435B-19
Page 21 of 37
TYRE PRESSURE MONITOR
Fault finding - Conformity check
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
NOTESOnly check conformity after a complete check using the diagnostic tool.
Test conditions: Engine switched off, after ignition feed on, tyres inflated to correct
pressure.
Order Sub-functionParameter or Status
checked or ActionDisplay and notes Fault finding
2Tyre
managementPR007:PAX system
authorised rangeX = 120 miles (200 km)
if the vehicle is fitted and
configured with PAX
System tyres.
X = 0 km if no PAX
System tyres or not
configured in the UCH.None
PR009:Front axle
low speed
recommended
pressure
X = Recommended
pressure.Make sure the values
entered are actually the
recommended ones by
comparing them with
those specified in
Workshop Repair Manual
370Section 35A
Specifications.
If they are not, write the
recommended pressures
with command VP005
Enter recommended
pressures in the Repair
section of this note. PR010:Rear axle
low speed
recommended
pressure
PR012:Front axle
high speed
recommended
pressure
PR011:Rear axle
high speed
recommended
pressure
PR014:Left/right-hand
imbalance
threshold0.5 barNone
Edition 435B-20
Page 22 of 37
TYRE PRESSURE MONITOR
Fault finding - Conformity check
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
NOTESOnly check conformity after a complete check using the diagnostic tool.
Test conditions: Engine switched off, after ignition feed on, tyres inflated to correct
pressure.
Order Sub-functionParameter or Status
checked or Action Display and notes Fault finding
2 (con-
tinued)Tyre
managementPR015:Slight under-
inflation threshold- 0.4 bar
None PR059:Puncture report
threshold- 0.6 bar
PR017:Cold over-inflation
threshold0.7 bar
PR018:Warm over-inflation
threshold0.8 bar
PR016:Driving range
following punctureX Km
X = 120 miles
(200 km) if no tyre
puncture is
detected.X = Mileage remaining
following a tyre puncture.
Edition 435B-21
Page 23 of 37
TYRE PRESSURE MONITOR
Fault finding - Conformity check
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
NOTESOnly check conformity after a complete check using the diagnostic tool.
Test conditions: Engine switched off, after ignition feed on, tyres inflated to correct
pressure.
Order Sub-functionParameter or Status
checked or Action Display and notes Fault finding
3Tyre displayET038:Request lighting of
Service warning
light (only for PAX
System)INACTIVEACTIVE, if a puncture is
detected.
If the pressure of all tyres
is correct, perform fault
finding on the other
computers.
ET039: STOP warning light
requestINACTIVEACTIVE, if a puncture is
detected (without PAX
System) or at the end of
the driving range following
a puncture (with PAX
System).
ET016:Buzzer activation
requestINACTIVE, if the
Tyre Pressure
Monitor system
functions normally
and tyre pressure is
correct.There is a buzzer
activation request for all
severity level 1 warnings
(puncture). The buzzer
emits a single beep when
a fault occurs.
STATUS 1:
Request for buzzer
activation when a
puncture is detected.
STATUS 2
Request for buzzer
activation to warn the
driver that the vehicle
speed is too high when the
vehicle has one or more
punctured tyres. This
information is only valid on
vehicles fitted with PAX
System tyres.
Edition 435B-22
Page 24 of 37
TYRE PRESSURE MONITOR
Fault finding - Interpretation of statuses
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50TYRE PRESSURE MONITOR
Fault finding - Interpretation of statuses
ET032
ET033
ET034
ET035FRONT LEFT-HAND WHEEL VALVE SIGNAL
FRONT RIGHT-HAND WHEEL VALVE SIGNAL
REAR RIGHT-HAND WHEEL VALVE SIGNAL
REAR LEFT-HAND WHEEL VALVE SIGNAL
NOTESBefore carrying out any operation, apply the fault finding procedure (see Introduction).
Special notes: If a tyre pressure sensor is present in the wheel, precautions must
be taken when removing/refitting tyres. Failure to take the precautions specified
in Section 35 of the Workshop Repair Manual could result in the sensor being
damaged, and potential operating faults in the tyre pressure monitor.
OK:
Absent:
Over-inflated:
Punctured:
Under-inflated: The sensor is operating correctly and the pressure is correct.
The sensor does not transmit or is not present on the vehicle.
The sensor sends a "tyre over-inflated" signal.
The sensor sends a "tyre very under-inflated" signal (recommended pressure 0.6 bar) or a
rapid pressure loss signal.
The sensor sends a "tyre under-inflated" signal.
Make sure the signal sent by the sensor corresponds to the pressure measured with the pressure gauge.
If it does not, inflate or deflate the tyres and check that they change status.
IMPORTANT
Wait 90 seconds before checking the change of status.
Original status = over-inflated
Original status = punctured or under-
inflatedDeflate
InflateFinal status = OK or punctured or under-
inflated
Final status = OK or over-inflated
If the status still displays an incorrect signal as compared to the tyre inflation level, refer to the fault finding chart.
–If the original status is: over-inflated or under-inflated
See ALP 2 and 3 Pressure adjustment.
–If the original status is: Punctured
See ALP 7 Puncture: change the tyre.
–If the original status is: Absent
See ALP 4, 5 and 6 Sensor out of order.
–If the status does not change, replace the sensor on the wheel concerned by following the instructions and
programming procedure for the four valve codes, SC002 Program four valve codes (see Configuration and
programming).
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
SSPP_V48_ET032/SSPP_V4C_ET032 /SSPP_V4D_ET032/SSPP_V4F_ET032 /SSPP_V50_ET032/
SSPP_V48_ET033/SSPP_V4C_ET033 /SSPP_V4D_ET033/SSPP_V4F_ET033 /SSPP_V50_ET033/
SSPP_V48_ET034/SSPP_V4C_ET034 /SSPP_V4D_ET034/SSPP_V4F_ET034 /SSPP_V50_ET034/
SSPP_V48_ET035/SSPP_V4C_ET035 /SSPP_V4D_ET035/SSPP_V4F_ET035 /SSPP_V50_ET035
Edition 4
35B-23
