tyre pressure RENAULT SCENIC 2008 J84 / 2.G Passenger Comparment Connection Unit Workshop Manual

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-27
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-27V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.2.4 Renault card check by the UCH:
a/ Card check:
When the engine is running, the UCH checks for the presence of the Renault card in the passenger compartment (if
vehicle is hands-free) or in the card-reader when a door is opened then closed. If the Renault card is not detected, a
message on the instrument panel and a buzzer warn the driver.
Command AC036 Internal aerial test is used to check the area covered by the starting aerials inside the passenger
compartment (hands-free vehicles). The card reader flashes when the card is detected.
This command allows a hands-free card to be recognised even if it does not belong to the vehicle.
b/ Low battery warning:
If the Renault card battery is faulty or flat, the change card battery message is displayed on the instrument panel
when the vehicle is started, if there have been 5 attempts to authenticate the Renault card since the battery fault.
c/ Storing information on the card:
A device allowing information relating to the vehicle to be read from the card is available.
Information available: – VIN (Vehicle Identification Number).
–Mileage.
–Fuel level.
–Mileage before oil change.
–Tyre pressure (if vehicle fitted with SSPP).
–Status of OBD warning light.
–Oil level.
2.5 Immobiliser warning light programs
Immobiliser warning light Vehicle protection status
Ignition
offWarning light flashes slowlyVehicle protected (immobiliser active or fault with
steering lock)
Warning light not lit New vehicle or blank UCH storage mode
Ignition
onWarning light flashes slowly Renault card not recognised
Warning light continuously lit Injection authentication fault
Warning light not lit Vehicle unprotected (immobiliser inactive)

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-46
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-46V9 MR-372-J84-87B000$129.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
5. TYRE FUNCTION
SYSTEM COMPOSITION
The tyre pressure monitor system consists of the following components:
–four sensors (one on each wheel but not on the spare wheel),
–a computer (UCH),
–an instrument panel display for the driver.
WARNING:
It is forbidden to install PAX System tyres on a vehicle without PAX System tyres as standard.
In the MEGANE II family, PAX System tyres can only be installed on the 5-seat SCENIC II.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-47
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
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UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
SYSTEM OPERATION
–The valves are activated approximately 1 minute after the vehicle has been running at a speed above 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 exceeding 68 mbar or if the pressure difference since last emitting exceeds 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 Inflate tyres for motorway is displayed 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-inflation when cold = recommended pressure + 700 mbar,
–over-inflation when hot = recommended pressure + 850 mbar,
–under-inflation = recommended pressure - 400 mbar,
–serious under-inflation = recommended pressure - 600 mbar,
–imbalance = difference in pressure between the left-hand and right-hand wheels on the same axle greater
than 500 mbar.
–Information messages for the driver:
–Stop! Tyre puncture + STOP warning light + wheel concerned is highlighted on instrument panel display +
buzzer.
–Adjust tyre pressure + the wheel concerned is highlighted on instrument panel display.
–Inflate tyres for motorway + four wheels highlighted on instrument panel display.
–Tyre sensor fault + the wheel concerned is erased.
–Electronic fault + "Service" warning light + the four wheels concerned disappear from the instrument panel
display.
–No display of the tyre inflation pressure on the instrument panel on MEGANE II.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Replacement of components PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Replacement of components
87B
87B-49
87B
87B-49V9 MR-372-J84-87B000$172.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Replacement of components
REPLACING THE UCH COMPUTER
Switch off the ignition before replacing the UCH.
After replacing the UCH, configure the new computer for the equipment present on the vehicle.
●Configure the UCH: WITH or WITHOUT Tyre pressure monitor function using command CF023 Tyre pressure
monitor function in scenario SC008 UCH type.
●Enter the recommended pressures with command VP005 Enter recommended pressures.
●Program the four valve codes using command SC002 Program the four valve codes.
The configurations are described under the Configuration and programming section.
REPLACING ONE OR MORE VALVES
Program the UCH with the new valve code by running command SC002 described in the Configuration and
programming section.
Note: Program all four valve codes even if only one valve has been replaced.
REPLACING THE INSTRUMENT PANEL
After replacing the instrument panel, configure it for the equipment installed in the vehicle.
Configure the tyre pressure monitor function WITH or WITHOUT in the instrument panel using command CF145
Tyre pressure monitor (see 83A, Instrument panel).
MR-372-J84-87B000$172.mif

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
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87B-57
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
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87B-57V9 MR-372-J84-87B000$215.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
5/ TYRE PRESSURE MONITORING SYSTEM FUNCTION
5.1 PROGRAMMING PROCEDURE FOR THE 4 VALVE CODES (SC002)
SC002:
Programming the four valve codes
IMPORTANT:
Any operation involving the replacement of a wheel sensor, requires perfect knowledge of the
recommendations defined in Repair Manual 364 (for Mégane II) or 370 (for Scénic II), section 35.
●Inflate the four tyres to 3.8 bar.
●Establish communication with the UCH using the diagnostic tool.
●Select the Repair mode menu.
●Select the Programming menu.
●Select line SC002 in the Tyre function.
●The stored codes and valve sets detected are displayed.
●Select the Valve set selection menu, then Summer or Winter.
●Confirm to display the Valve programming conditions table.
●Confirm by selecting next to obtain the Find valve codes menu.
●Excite each valve by holding the valve exciter against the tyre just below 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.
●The order for programming the codes is as follows:
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.
●Check that no message appears on the instrument panel.
IMPORTANT:
When swapping wheels over, reprogram the UCH with the new valve positions using the diagnostic tool and
program the valve codes.
The coloured rings will then have to be placed back in the location marked on the label on the driver's door.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
87B-58
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
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UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
5.2 PROCEDURE FOR ENTERING THE RECOMMENDED PRESSURES (VP005)
VP005:
ENTER RECOMMENDED PRESSURES
To enter the recommended pressures correctly, use the values recommended by the manufacturer and found in
the repair manual (MR 364 (Mégane II) or MR 370 (Scénic II), Mechanical, 35A, Tyre pressure: Identification),
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 the vehicle type: Extended 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 the parameters PR009 Front wheels low speed recommended pressure to PR012 Front wheels high
speed recommended pressure.
In the event of any problem occurring, start the operation again 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".

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
87B-62
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
87B-62V9 MR-372-J84-87B000$215.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
8/ UCH TYPE CONFIGURATION PROCEDURE (SC008)
8.1 Vdiag 44, 48
This procedure will enable the UCH to be configured in relation to the vehicle to provide optimum running.
–Click on the Repair mode and in the Programming menu,
–confirm line SC008 UCH type,
–follow the procedure and enter the following data:
–CF097 Vehicle type (3-door/4-door/5-door/cabriolet/extended MPV/MPV/Estate),
–confirm, follow the procedure and enter the following data:
–CF010 Hands-free function (WITH or WITHOUT),
–CF023 Tyre pressure monitoring system function (WITH or WITHOUT),
–CF057 Type of heating resistors (NONE, 1000 W, or 1800 W),
–CF019 Type of air conditioning (HEATING, AUTOMATIC, MANUAL),
–CF027 Type of windscreen (TINTED, HEAT INSULATING),
–CF035 Rain/light sensor (WITH or WITHOUT),
–CF014 Daytime running lights (WITH or WITHOUT),
–CF022 Factory fitted perimeter protection (WITH or WITHOUT): function only available on vehicles for the
Mexican market,
–CF173 One-touch window(s)/Sunroof (WITH or WITHOUT),
–confirm, follow the procedure and enter the following data:
–CF036 Selective opening of the opening elements (WITH or WITHOUT) Only if CF010 = WITHOUT
–confirm, follow the procedure and enter the following data:
–CF085 Valet card function (WITH or WITHOUT) Function only available in Mexico,
–(This status will only be available if the following conditions are met: CF036 Selective opening of opening
elements = WITH),
–check that the options configured are those desired and finish.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
87B-63
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
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87B-63V9 MR-372-J84-87B000$215.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
8.2 Vdiag 4C and 4D:
This procedure will enable the UCH to be configured in relation to the vehicle to provide optimum running.
–Click on the Repair mode and in the Programming menu,
–confirm line SC008 UCH type,
–follow the procedure and enter the following data:
CF097 Vehicle type (3-door/4-door/5-door/cabriolet/extended MPV/MPV/Estate).
CF011 Gearbox type (BVA or BVM).
CF020 Type of driving style (Right-hand or Left-hand).
CF028 Engine type (F or K)
–confirm, follow the procedure and enter the following data:
CF010 Hands-free function (WITH or WITHOUT),
CF023 Tyre pressure monitoring system (WITH or WITHOUT),
CF057 Type of heating resistors (NONE, 1000 W, or 1800 W),
CF019 Type of air conditioning (HEATING, AUTOMATIC, MANUAL),
CF027 Type of windscreen (TINTED, HEAT INSULATING),
CF087 Front fog light (WITH or WITHOUT),
CF014 Daytime running lights (WITH or WITHOUT),
CF012 Rain sensor (WITH or WITHOUT),
CF029 External temperature sensor (WITH or WITHOUT).
–confirm, follow the procedure and enter the following data:
CF036 Selective opening of opening elements (WITH or WITHOUT): Only if CF010 = WITHOUT.
CF016 PAX system type tyre (WITH or WITHOUT): Only if CF097 = MPV or extended MPV or cabriolet and if
CF023 = WITH.
CF100 Deadlocking (WITH or WITHOUT).
CF013 Light sensor (WITH or WITHOUT): Only if CF014 = WITHOUT.
CF022 Factory fitted
perimeter protection (WITH or WITHOUT). Function only available on vehicles sold in
Mexico. CF083 One touch window(s) (WITH or WITHOUT): Absent if CF097 = Cabriolet.
–confirm, follow the procedure and enter the following data:
CF085 Valet card function (WITH or WITHOUT) Function only available in Mexico. Only if CF036 = WITH and
CF023 = WITHOUT.
–check that the options configured are those desired and finish.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
87B-64
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
87B-64V9 MR-372-J84-87B000$215.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
8.3 Vdiag 4F and 50:
This procedure will enable the UCH to be configured in relation to the vehicle to provide optimum running.
–Click on the Repair mode and in the Programming menu,
–confirm line SC008 UCH type,
–follow the procedure and enter the following data:
–CF097 Vehicle type (3-door/4-door/5-door/cabriolet/Estate) except for Scénic (extended MPV/MPV).
–confirm, follow the procedure and enter the following data:
CF010 Hands-free function (WITH or WITHOUT),
CF023 Tyre pressure monitoring system (WITH or WITHOUT),
CF057 Type of heating resistors (NONE, 1000 W, or 1800 W),
CF019 Type of air conditioning (HEATING, AUTOMATIC, MANUAL),
CF027 Type of windscreen (TINTED, HEAT INSULATING),
CF035 Rain/light sensor (WITH or WITHOUT),
CF014 Daytime running lights (WITH or WITHOUT),
CF189 Protection type (TYPE 1, TYPE 2 or WITHOUT): TYPE 1 = with factory
fitted perimeter protection, TYPE
2 = with Cobra type alarm and WITHOUT = without factory fitted perimeter protection and without Cobra alarm.
–confirm, follow the procedure and enter the following data:
CF173 One-touch window(s)/sunroof (1 OTW* phase 1/1 OTW* phase 2/2 or 4 OTW*/WITHOUT): Absent if
CF097 = Cabriolet.
1 OTW* phase 1 = 1 driver side one touch window with a phase 1 bodywork vehicle.
1 OTW* phase 2 = 1 driver side one touch window with a phase 2 bodywork vehicle.
2 or 4 OTW = 2 or 4 one touch windows.
WITHOUT = no one touch windows on the vehicle.
–confirm, follow the procedure and enter the following data:
CF188 Production number type (Jxxxxxx or OTHER): only if CF097 = 4-doors and CF173 = 1 OTW* Phase 1.
The production number is located on the oval plate on the vehicle's right-hand side B-pillar. The production number
consists of 7 characters: 1 letter indicating the production plant followed by 6 figures.
–If the production number starts with the letter J, select Jxxxxxx.
–If the production number does not start with the letter J, select Other.
–Confirm, follow the procedure and enter the following data:
CF036 Selective opening of opening elements (WITH or WITHOUT): Only if CF010 = WITHOUT CF016 PAX
System type tyre (WITH or WITHOUT): Only if CF097 = MPV or Extended MPV and if CF023 = WITH.
–confirm, follow the procedure and enter the following data:
CF085 Valet card function (WITH or WITHOUT): Only if CF036 = WITH and CF023 = WITHOUT.
–check that the options configured are those desired and finish.
OTW*: One-touch window(s)IMPORTANT
Only configure WITH valet card function when the vehicle is electrically pre-equipped with the valet option.
Incorrect configuration may cause certain pieces of equipment to malfunction.
Note:
After having finished the UCH configuration, run command AC037 "TRANSMITTING AERIALS FAULT FINDING"
and check that there are no faults.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
87B-65
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
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UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
9) CONFIGURATION PROCEDURE FOR THE TYRE PRESSURE MONITOR FUNCTION (CF023)
10) INSTRUMENT PANEL CONFIGURATION PROCEDURE (CF145)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 then line CF023, then With or Without.
●Confirm the selection.
●Check that sure the configuration has been properly stored by checking the Read configuration menu at line
LC017 Tyre pressure monitor function.
IMPORTANT:
CONFIGURATION INCONSISTENCY BETWEEN THE INSTRUMENT PANEL AND UCH
1st case–The instrument panel detects that the tyre pressure monitor is programmed in the UCH but
not its proper configuration. The message ELECTRONIC FAULT appears, then the
4 wheels disappear on the instrument panel display, and the Service warning light comes
on.
2nd 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 FAULT will appear, the four wheels
will disappear from the instrument panel display and the Service warning light will come
on.
CF145:
TYRE PRESSURE MONITOR
●After the multiplex network test, select Instrument panel.
●Select Repair mode.
●Select Write configuration.
●Select line CF145, then With or Without.
●Confirm the selection.
●Check that the configuration has been properly stored in the Read configuration menu at line LC056 Tyre
pressure monitor.