TYRE PRESSURE MONITOR
Fault finding - Introduction
35B
35B-2
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
135BTYRE PRESSURE MONITOR
Fault finding - Introduction
1. SCOPE OF THE DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this document):
–Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring diagrams:
–Visu-Schéma (CD-ROM).
Diagnostic tools type:
–CLIP
Special tooling required:
3. REMINDERS
Procedure
To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition
feed).
Proceed as follows:
–vehicle card in reader,
–Press and hold start button (longer than 5 seconds) with start-up conditions not fulfilled,
–Then connect the diagnostic tool and perform the desired operations. Vehicle(s): SCENIC II
Function concerned: Tyre Pressure MonitorName of computer: UCH
Program no.: 0350 and higher
Vdiag No: 48, 4C, 4D, 4F, 50
Special tooling required
Multimeter
Elé. 1681Universal bornier
Ms. 1607Valve exciter
Pressure gauge
Tyre inflation system
SSPP_V48_PRELI /SSPP_V4C_PRELI/SSPP_V4D_PRELI/SSPP_V4F_PRELI/SSPP_V50_PRELI
Edition 4
TYRE PRESSURE MONITOR
Fault finding - System operation
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
System operation:
–The valves are activated after driving at a speed greater than 12 mph (20 km/h).
–During driving, the valves emit signals every minute.
–The valves remain active for 15 minutes after the vehicle stops, then switch to standby mode.
–In standby mode, the valves emit signals only if they detect a pressure difference between two successive
measurements greater than 68 mbar or if the pressure difference since last emitting is greater than 68 mbar (due
to tyre cooling).
–The tyres are considered to be cold when the vehicle speed has been zero for 1h 45 min.
–The minimum time for detection of a leak is approximately 15 minutes.
–The message Pressure unsuitable for the speed is activated only if the vehicle travels at more than 102 mph
(170 km/h) (as an indication) for 3 minutes and the pressure on at least one of the tyres is 400 mbar less than the
recommended pressure at low speed. This message is inactive if the tyres are inflated to motorway pressure,
irrespective of the vehicle speed.
–Alert thresholds:
–over-inflated while cold =recommended pressure + 700 mbar
–over-inflated while warm = recommended pressure + 850 mbar
–under-inflated = recommended pressure - 400 mbar
–very under-inflated = recommended pressure - 600 mbar
–imbalance = difference in pressure between the left-hand and right-hand wheels on the same axle greater
than 500 mbar
–Tyre pressure monitor information messages for the driver:
–"PUNCTURE: CHANGE TYRE" + STOP warning light + highlighting of the wheel concerned on the
instrument panel display + buzzer.
–"ADJUST TYRE PRESSURE" + highlighting of the wheel concerned on the instrument panel.
–"INFLATE TYRES MOTORWAY" + highlighting of all four wheels on the instrument panel.
–"TYRE SENSOR INOPERATIVE" + clearing of the wheel concerned.
–"ELECTRONIC FAULT" + "Service" warning light + the wheels concerned disappear from the
instrument panel.
–Tyre pressure monitor information messages for a puncture with the PAX System:
–"PUNCTURE: REPAIR TYRE" + highlighting of the wheel concerned on the instrument panel.
–"PUNCTURE: SLOW DOWN" + buzzer (if vehicle speed > 48 mph (80 km/h)).
–"DRIVING WITH FLAT: X MILES REMAINING" (X decreases from 120 miles (200 km) to 0) + STOP
warning light when X = 0 + highlighting of the wheel concerned on the instrument panel.
⇒
No instrument panel display of tyre pressure on the SCENIC II.
Edition 435B-10
TYRE PRESSURE MONITOR
Fault finding - Configurations and programming
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50TYRE PRESSURE MONITOR
Fault finding - Configurations and programming
SC002:
PROGRAMMING THE FOUR VALVE CODES
IMPORTANT
Any repairs that involve replacement of a wheel sensor require knowledge of the recommendations
defined in Workshop Repair Manual 371 section 35.
–Inflate the four tyres to 3.8 bar.
–Using the diagnostic tool, establish dialogue with the UCH.
–Select the Repair mode menu
–Select the Programming menu
–Select line SC002 Programming the four valve codes under the Tyres function.
Display of stored codes and recognised valve set.
–Select the Valve set selection menu, then Summer or Winter.
–Confirm to obtain the table "valve programming conditions".
–Confirm by selecting next, which brings up the search for valve code menu.
–Excite each valve by holding the valve exciter on the tyre, just under the valve in question.
–Start with the front left-hand wheel.
–Wait for the new code to appear on the screen before moving on to the next valve.
–Program the codes in the following order:
Front left-hand Front right-hand Rear right-hand Rear left-hand
–Click on the "Confirm" button to transmit the codes to the UCH.
–Inflate the tyres to the recommended pressures.
–Carry out a road test: speed > 12 mph (20 km/h) for 10 minutes.
–Make sure no message appears on the instrument panel.
IMPORTANT
When swapping wheels over, reprogram the UCH for the new valve positions using the diagnostic tool and
programming the valve codes.
Then replace the colour rings in the locations noted on the label on the driver's door.
Edition 435B-14
TYRE PRESSURE MONITOR
Fault finding - Configurations and programming
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
SC001:
READING VALVE SETS AND STORED CODES
–Select the Repair mode menu
–Select the Programming menu
–Select line SC001 Read valve set and stored codes in the Tyres function.
VP005
ENTERING RECOMMENDED PRESSURES
To enter the recommended pressures correctly, use the values specified by the manufacturer and found in the
Workshop Repair Manual or driver's handbook for the vehicle with the tyres installed on the vehicle, or
indicated on the label on the driver's door.
–Select the repair mode menu.
–Select the other parameters menu.
–Select line VP005 Enter recommended pressures.
–Program the vehicle type: MPV or other.
–Enter the recommended pressures at the keyboard.
–Confirm the pressures.
–Click on "Finish" to end the procedure.
Check the recommended pressures in memory:
–Select the Statuses/Parameters menu.
–Select the Tyre management menu.
–Read parameters PR009 to PR012.
–If there is a fault, repeat the operation from the beginning.
IMPORTANT
If the recommended pressure format is not correct or if the pressure entered is outside the permitted tolerance
values in relation to the type of vehicle selected, the following error message will be displayed: "Procedure failed:
incorrect pressure format or value outside authorised range".
Edition 435B-15
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
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