Page 25 of 37
TYRE PRESSURE MONITOR
Fault finding - Interpretation of statuses
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
ET036
TYRE PRESSURE IMBALANCE
NOTESBefore carrying out any operation, apply the fault finding procedure (see Introduction).
None
Note:
The threshold of imbalance between the left-hand and right-hand wheels on the same axle is 500 mbar.
Check, using a pressure gauge, that the inflation pressure of the tyres fitted on the vehicle indeed corresponds
to the pressures noted on the door, in the Driver’s Handbook or in MR 370, 35A, and if not readjust the
pressures. Ensure the correct balance of the pressures or axle(s) concerned.
If the fault is still present, contact the Techline.
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_ET036/SSPP_V4C_ET036 /SSPP_V4D_ET036/SSPP_V4F_ET036 /SSPP_V50_ET036
Edition 4
35B-24
Page 26 of 37
TYRE PRESSURE MONITOR
Fault finding - Interpretation of statuses
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
ET037
TYRE PRESSURE APPROPRIATE FOR SPEED
NOTESBefore carrying out any operation, apply the fault finding procedure (see 35B
Introduction).
NO: If the vehicle speed is above 102 mph (170 km/h) (as an indication) for more than
3 minutes and the pressure on at least one of the tyres is 400 mbar or more below
"motorway" pressure.
YES: if the vehicle speed is below 102 mph (170 km/h) (as an indication) or if the
pressure of the four tyres corresponds to the pressure of parameters PR011 and
PR012 High speed recommended pressure, whatever the speed.
Make sure that the tyre pressures are at the recommended "motorway" pressure (see MR 370, 35A or Driver's
Handbook), and reinflate the tyres if necessary.
Check that the pressures entered (PR009 to PR012) match the manufacturer's specifications.
If the pressures entered do not correspond to the manufacturer's values, write the recommended pressures
using procedure VP005 "Write recommended pressures (see Configuration and programming.
If status ET037 remains NO, contact the Techline.
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_ET037/SSPP_V4C_ET037 /SSPP_V4D_ET037/SSPP_V4F_ET037 /SSPP_V50_ET037
Edition 4
35B-25
Page 27 of 37
TYRE PRESSURE MONITOR
Fault finding - Interpretation of statuses
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
In the event that status ET040 is inoperative: ET040
TYRE PRESSURE MONITOR SYSTEM
NOTESBefore carrying out any operation, apply the fault finding procedure (see Introduction).
Check that no fault is present.
ACTIVE: If the four wheel valves transmit their signal and the signal is correctly received by the UCH.
INOPERATIVE: If a component is faulty or incorrectly configured.
Check in the configuration reading menu to ensure that configuration LC017 tyre pressure monitor has been
properly entered in the UCH. If this is not the case, start configuration in the "Programming" menu with
command CF023 Tyre pressure monitor, under SC008 UCH type.
Check that there is no ABS fault.
Use status ET045 RF signal received to check that the receiving aerial works correctly by trying central door
locking with the card at 4 to 5 metres to the rear right-hand of the vehicle.
If central door locking does not work, check aerial presence and positioning on the UCH.
If, after performing all these checks, no fault has been found and status ET040 is still Inoperative, contact
Techline.
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_ET040/SSPP_V4C_ET040 /SSPP_V4D_ET040/SSPP_V4F_ET040 /SSPP_V50_ET040
Edition 4
35B-26
Page 28 of 37
TYRE PRESSURE MONITOR
Fault finding - Interpretation of parameters
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50TYRE PRESSURE MONITOR
Fault finding - Interpretation of parameters
PR003
PR004
PR005
PR006FRONT LEFT-HAND WHEEL PRESSURE
FRONT RIGHT-HAND WHEEL PRESSURE
REAR RIGHT-HAND WHEEL PRESSURE
REAR LEFT-HAND WHEEL PRESSURE
NOTESThere must be no faults present
Carry out this fault finding procedure after finding a discrepancy between these
parameters on the display.
IMPORTANT
After a battery cut-off, the parameters will display a default value (0 bar). By creating a tyre leak or using
a road test, force each valve to transmit in order to see the actual pressure levels measured by the
valves during the fault finding procedure.
In all cases, check that the pressures displayed on the diagnostic tool actually match the pressure-gauge
readings (to within 0.2 bar).
Parameters PR003 to PR006 display incorrect values (other than 0 bar)
Check the pressure with another pressure gauge to see if the variation is due to the valve or the pressure
gauge.
Inflate the tyres to the recommended pressure by taking into account the variation of the pressure gauge if
necessary, or replace the valve if it is defective.
After programming, repeat the fault finding procedure from the beginning.
AFTER REPAIRRepeat the check from the start.
SSPP_V48_PR003/SSPP_V4C_PR003/ SSPP_V4D_PR003/SSPP_V4F_PR003/ SSPP_V50_PR003/
SSPP_V48_PR004/SSPP_V4C_PR004/ SSPP_V4D_PR004/SSPP_V4F_PR004/ SSPP_V50_PR004/
SSPP_V48_PR005/SSPP_V4C_PR005/ SSPP_V4D_PR005/SSPP_V4F_PR005/ SSPP_V50_PR005/
SSPP_V48_PR006/SSPP_V4C_PR006/ SSPP_V4D_PR006/SSPP_V4F_PR006/ SSPP_V50_PR006
Edition 4
35B-27
Page 29 of 37
TYRE PRESSURE MONITOR
Fault finding - Interpretation of parameters
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
PR009
PR010
PR011
PR012FRONT AXLE RECOMMENDED LOW SPEED PRESSURE
REAR AXLE RECOMMENDED LOW SPEED PRESSURE
REAR AXLE RECOMMENDED HIGH SPEED PRESSURE
FRONT AXLE RECOMMENDED HIGH SPEED PRESSURE
NOTESThere must be no present or stored faults
Carry out this fault finding procedure after detecting a discrepancy between the
manufacturer's recommended pressure levels and the readings stored in the UCH
memory.
Warning:
Use Workshop Repair Manual 370 or the pressure label attached to the driver's door
to obtain the recommended pressures for the tyres actually fitted to the vehicle.
If, after comparing with the manufacturer's recommendations (see MR 370, 35A) the tyre pressure readings
stored in the UCH memory are found to be incorrect, reprogram as follows:
In the main menu, select Repair mode, then click on the Other settings button and run command VP005 Enter
recommended pressures (see Configuration and programming.
Program the Workshop Repair Manual values into the memory and confirm.
Then check the Parameters menu to make sure the recommended pressures have been correctly entered.
If there is a fault, repeat the operation from the beginning.
If the recommended pressures cannot be entered properly, contact Techline.
AFTER REPAIRRepeat the check from the start.
SSPP_V48_PR009/SSPP_V4C_PR009/ SSPP_V4D_PR009/SSPP_V4F_PR009/ SSPP_V50_PR009/
SSPP_V48_PR010/SSPP_V4C_PR010/ SSPP_V4D_PR010/SSPP_V4F_PR010/ SSPP_V50_PR010/
SSPP_V48_PR011/SSPP_V4C_PR011/SSPP_V4D_PR011/SSPP_V4F_PR011/SSPP_V50_PR011/
SSPP_V48_PR012/SSPP_V4C_PR012/ SSPP_V4D_PR012/SSPP_V4F_PR012/ SSPP_V50_PR012
Edition 4
35B-28
Page 30 of 37
TYRE PRESSURE MONITOR
Fault finding - Customer complaints
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50TYRE PRESSURE MONITOR
Fault finding - Customer complaints
NO DIALOGUE WITH THE UCH COMPUTER ALP 1
"READJUST TYRE PRESSURE" MESSAGE LIGHTS UP ALP 2
"ELECTRONIC FAULT" MESSAGE LIGHTS UP ALP 3
"TYRE SENSOR OUT OF ORDER" MESSAGE LIGHTS UP
with disappearance of a single wheel warning light ALP 4
with disappearance of the four wheel warning lights ALP 5
intermittent warning ALP 6
"PUNCTURE - CHANGE TYRE" MESSAGE LIGHTS UP ALP 7
Edition 435B-29
Page 31 of 37
TYRE PRESSURE MONITOR
Fault finding - Fault Finding Chart
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50TYRE PRESSURE MONITOR
Fault finding - Fault Finding Chart
ALP 1 No dialogue with the computer
NOTESNone
Try the diagnostic tool on another vehicle.
Make sure the tool update version is more recent than CD-ROM No. 32.
Check:
–the connection between the diagnostic tool and socket (connection and cable in good condition).
–the computer power supply
–the engine and passenger compartment fuses.
Make sure that the CLIP sensor is fed by tracks 16 (+ 12 V), 4 and 5 (earth) of the diagnostic socket, which
can be seen by the two red warning lights on the sensor lighting up.
Make sure that the CLIP sensor is connected to the computer's USB port.
Make sure that the CLIP sensor is communicating properly with the vehicle's computers; this can be seen by
the two green diodes on the sensor lighting up.
Check the following tracks on the diagnostic socket:
track 1 + After ignition feed
track 16 + battery feed
tracks 4 and 5 Earth
Repair if necessary.
Check the continuity, insulation and absence of interference resistance on lines:
multiplex line H (diagnostic socket track 6)
multiplex line L (diagnostic socket track 14)
With a multimeter, make sure that the voltages at the diagnostic socket terminals are:
–2.5 V between CAN H (track 6) and the earth (tracks 4 and 5)
–2.5 V between CAN L (track 14) and the earth (tracks 4 and 5)
If dialogue with the UCH still has not been established after all the checks, contact your Techline.
AFTER REPAIRCheck that no faults are still present.
Check that the system is operating correctly.
SSPP_V48_ALP01 /SSPP_V4C_ALP01/SSPP_V4D_ALP01/SSPP_V4F_ALP01/SSPP_V50_ALP01
Edition 4
35B-30
Page 32 of 37
TYRE PRESSURE MONITOR
Fault finding - Fault Finding Chart
35B
ALP 2"Adjust tyre pressure" message lights up (the wheel concerned
fills in on the display)
NOTESCheck that all the faulty tyres are fitted with tyre pressure monitor valves.
Check that the tyres are cold (vehicle immobilised for approximately 2 hours) and if not,
add 0.3 bar to the recommended pressures.
Make sure the tyre has the
recommended pressure as specified
on the label or in the driver's
handbook (not under- or over-
inflated).
Are the tyres at the recommended
pressures?
YES
Read the pressures under PR003 to
PR006
Do PR003 to PR006 match the
readings taken with a pressure
gauge (within 0.2 bar)?
NO
Check the tyre pressure with another
gauge.
Does the new reading indicate
dispersal by the first gauge?
YES
Adjust the tyre pressure, taking into
account the pressure gauge
variation.
Replace the faulty sensor(s).
AFTER REPAIRCarry out a complete check with the diagnostic tool.
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
NO
Readjust the tyre pressures
Read the recommended
pressures in the UCH (PR009
to PR012)
Do the values of these
parameters match the
manufacturer's
recommended pressures?
YES
Program the four valve codes
and refit the coloured rings in
the positions indicated on the
label on the driver's side.
35B-31
YES
NO
NOWrite the
recommended
pressures with
command VP005
Enter
recommended
pressures.
SSPP_V48_ALP02 /SSPP_V4C_ALP02/SSPP_V4D_ALP02/SSPP_V4F_ALP02/SSPP_V50_ALP02
Edition 4
