2008 RENAULT SCENIC buttons

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-8
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-8V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
The ACCESS/SAFETY function is divided into three sub-functions: Access, Protection and Starting.
The maximum number of Renault cards which can be programmed on the vehicle is 4. There is no master Renault
card.
1 ACCESS/SAFETY FUNCTION
1.1 SUB-FUNCTION: ACCESS
The Megane II allows:
–locking/unlocking by pressing the buttons on the Renault card (remote control function),
–locking/unlocking by pressing the central door locking button,
–locking via the Renault Anti-Intruder Device (RAID),
–automatic relocking.
If the vehicle is fitted with the hands-free function:
–hands-free unlocking of the entire vehicle, by cutting the optical beam on one of the door handles,
–hands-free boot-only unlocking by pressing the boot opening switch,
–hands-free locking (by pressing the handle closure switch or the switch located in the boot badge).
If the vehicle is fitted with:
–electric child safety locking,
–deadlocking,
–selective opening element unlocking,
–the valet card function.
1.1.1 procedure of locking/unlocking by pressing the buttons on the Renault card:
1Opening element locking motors
2Encrypted 433 MHz RF connection (315 Mhz in Japan)
3Card button pressed

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-14
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-14V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
Conditions required:
–At least one vehicle card detected by the access aerials and not detected by the starting aerials.
–No doors open.
–No Renault card in the card reader.
–No + after ignition feed on the vehicle.
–The card must not be hands-free disabled (a Renault card is disabled for hands-free starting and access if it was
present in the vehicle when it was locked; the card is no longer disabled if it is detected by any aerial during
unlocking).
Statuses available for the locking function:
The UCH receives the locking request in the form of an earth, when one of the locking buttons on the door handles
or in the centre of the boot badge is pressed.
The locking requests can be viewed using statuses ET058 Driver's side handle locking switch, ET059
Passenger's side handle locking switch and ET060 Tailgate locking switch. The statuses of the doors detected
by the UCH as open or closed are displayed using statuses ET053 Driver's door, ET042 Passenger's door, ET051
Rear left-hand door, ET052 Rear right-hand door, ET050 Tailgate/boot and ET041 Opening rear screen (if fitted
to the vehicle).
The power supply level on the vehicle can be viewed using ET014 Power supply level requested.
The AC037 Transmitting aerials fault finding command interrogates the aerials for an update of potential faults.
Commands AC032 Test driver's side external aerials, AC033 Test passenger side external aerials and AC034
Test boot external aerials are used to check each zone separately. When the card is in the interrogated zone, the
card reader flashes. The interrogation lasts 1 minute.
These commands are used to check the hands-free access zones around the vehicle and will operate even if the
hands-free card does not belong to the vehicle.
e/ Display
Unlocking is indicated by 1 flash of the direction indicators.
Locking is indicated by 2 flashes of the direction indicators.Hands-free locking of the entire vehicle by stage:
1) The user presses one of the locking switches on the door handle or tailgate (located in the badge).
2) If the Renault card is not disabled for hands-free operation, the UCH sends a 125 kHz encrypted signal to
the access aerials (interrogation of the aerials on the side of the activated handle is performed first), and to
the starting aerials.
3) If the Renault card authenticates the code, it responds to the UCH using a 433 MHz encrypted signal.
4)If the UCH detects at least one Renault card in the access zone and this is authenticated (at least one Renault
card detected by the external aerials and not detected by the starting aerials; this is necessary to avoid the
vehicle being locked with the card inside), the UCH activates the locking motors.
5) If the UCH detects other cards inside the vehicle, it disables these cards for hands-free functions (access
and starting) until the next time the vehicle is unlocked.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-28
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-28V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.3 SUB-FUNCTION: STARTING
The UCH manages the control section of the starting sub-function. For this function to operate normally, the
protection function must proceed correctly (immobiliser inactive ET046 Immobiliser).
In order to control the starter motor, the UCH requires the following status and parameter information to check that
the starting conditions have been met:
–Start button ET070 Start button.
–Clutch pedal position ET048 Clutch pedal position.
–Brake pedal position ET047 Brake pedal position.
–Automatic gearbox selector lever position ET108 Automatic gearbox selector lever position.
–Position of the manual gearbox selector lever (see 87G, Engine compartment connection unit, Conformity
check).
If the starting conditions are met, the request for the Protection and Switching Unit to activate the starter motor can
be viewed using status ET110 UCH request to injection or Protection and Switching Unit.
1.4 Main COMPONENTS of the ACCESS/SAFETY function
1.4.1 Main components of the ACCESS sub-function:
–Renault card,
–UCH,
–optical presence sensors located in the door handles,
–access aerials integrated in the door handles and the tailgate,
–the locking switches incorporated in the door handles,
–the boot-only opening/locking switch built into the boot badge,
–opening element locking motors.
1.4.1.1 The Renault card:
The Renault card has three buttons which allow:
–locking of the vehicle,
–unlocking of the vehicle,
–the boot to be locked/unlocked.
The Renault hands-free card allows hands-free operation if it is located in the access and starting zones.
The Renault card is powered by a 3 V battery. This battery is required for operation in hands-free mode or remote
control mode (card button presses).
If the battery is old or in an area of frequency interference, the emergency insert located in the Renault card allows
the driver's door to be unlocked.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-36
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-36V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.4.3.7 Automatic gearbox computer (if fitted):
The computer informs the UCH of the selector position (park, neutral, etc.) via the multiplex network.
2 AIR CONDITIONING FUNCTION
The type of air conditioning control can be displayed by configuration reading LC013 Air conditioning type and
configured using command CF019 Air conditioning type (can be configured during configuration of the UCH
by the SC008 UCH type command).
2.1 Sub-function: USER SELECTION (Non-regulated air conditioning only)
The UCH receives the signal from the air conditioning panel via cable connection for the air conditioning request, for
electric heated rear screen and the signal for passenger compartment blower operation.
The UCH sends the request to the Protection and Switching Unit to start electric heated rear screen de-icing.
The UCH sends the request to the injection system to activate the air conditioning compressor.
The following statuses can be displayed:
–ET029 Air conditioning button.
–ET028 Heated rear screen button.
–ET015 Passenger compartment fan.
Operation of the indicator lights on the air conditioning and electric heated rear screen request buttons can be
checked using the following actuator commands:
AC015 Air conditioning button indicator and AC019 Heated rear screen indicator.
2.2 Sub-function: HEATING
The UCH manages the passenger compartment heating resistors (RCHs) by controlling power relays according to
the request for ventilation in the passenger compartment, the engine coolant temperature, the external temperature,
the electrical power balance, engine loading and, for the cabriolet version, if the roof is open.
The following statuses and parameters produced by the UCH can be displayed:
–PR001 Battery voltage.
–PR002 External temperature.
–ET015 Passenger compartment blower only with non-regulated air conditioning.
–ET017 Number of RCH*s required.
–ET018 Number of RCH*s authorised by alternator alternator charge rate.
–ET019 Number of RCH*s authorised by injection system.
–ET020 Number of RCH*s activated.
–ET021 RCH* 1 control.
–ET022 RCH* 2 control.
–ET031 Fast idle request for RCH.
–ET169 Engine.
–ET025 Retractable roof for cabriolet version only.
–ET026 Heated rear screen switch.
*RCH = Passenger Compartment Heating Resistors

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B-119
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B-119V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
KEYLESS VEHICLE FUNCTION
Sub-function: Access (continued 1):
*lckg: Locking
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Sub-functionParameter or
Status
checked Action Display and Notes Fault finding
AccessET056:Rear driver side
optical sensorACTIVE
INACTIVEIn the event of a fault,
consult the interpretation
of status ET056.
ET057:Passenger side
front/rear optical
sensorACTIVE
INACTIVEIn the event of a fault,
consult the interpretation
of status ET057.
ET058:Lckg* button on
driver's side
handles DEPRESSED
RELEASEDIn the event of a fault,
consult the interpretation
of status ET058.
ET059:Lckg* buttons on
passenger's side
handlesDEPRESSED
RELEASEDIn the event of a fault,
consult the interpretation
of status ET059.
ET060:Tailgate locking
buttonDEPRESSED
RELEASEDIn the event of a fault,
consult the interpretation
of status ET060.
ET086:Electric child
safety lockACTIVE
INACTIVESignal interpreted if
vehicle configured WITH
Child safety lock.
ET053:Driver's doorOPEN
CLOSED In the event of a fault, refer
to the interpretation of
status ET053.
ET042:Passenger doorOPEN
CLOSED In the event of a fault, refer
to the interpretation of
status ET042.
ET194:Passenger's
door or bonnetOPEN
CLOSED In the event of a fault, refer
to the interpretation of
status ET042.
ET051:Rear left-hand
doorOPEN
CLOSED In the event of a fault, refer
to the interpretation of
status ET051.
ET052:Rear right-hand
doorOPEN
CLOSED In the event of a fault, refer
to the interpretation of
status ET052.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
87B
87B -140
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
87B
87B -140V9 MR-372-J84-87B000$430.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RAID: Renault Anti-Intruder Device
*CPE: Electric central door locking
*Lckg: Locking Tool status Diagnostic tool title Vdiag
ET041Opening rear screenV48, V4C, V4D,
V4F, V50
ET042Passenger door V44, V48, V4C,
V4D, V4F, V50
ET043RAID* function authorisation by CPE*
V44, V48, V4C,
V4D, V4F, V50 ET044CPE* button
ET045RF signal received
ET046Engine immobiliser
ET047Brake pedal position
ET048Clutch pedal position
ET050Tailgate/Boot
ET051Rear left-hand door
ET052Rear right-hand door
ET053Driver's door
ET054Optical sensors supplied
ET055Front driver side optical sensor
ET056Rear driver side optical sensor
ET057Passenger side front/rear optical sensor
ET058Lckg* button on driver's side handles
ET059Lckg* buttons on passenger's side handles
ET060Tailgate locking button
ET061Open tailgate request
ET062Open rear screen requestV48, V4C, V4D,
V4F, V50

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -164
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -164V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RF: Radio frequencyET045
RF* signal. RECEIVED
NOTESThere must be no present or stored faults.
Special note:
This status is used for the Unlocking/Locking and hands-free starting functions.
This status simply makes it possible to check the condition of the UCH internal receiver
aerial.
ET045 NO on pressing one of the card buttons.
Check with the vehicle's second card.
If the status changes to YES, check ET066 Card button press received.
If the status remains NO, perform a test with a card belonging to another vehicle.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET045/UCH_V48_ET045/ UCH_V4C_ET045/
UCH_V4D_ET045 /UCH_V4F_ET045/UCH_V50_ET045

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
87B - 178
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
87B - 178V9 MR-372-J84-87B000$516.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*LCKG: lockingET058
ET059
LCKG* BUTTON ON DRIVER'S SIDE HANDLES
LCKG* BUTTONS ON PASSENGER SIDE HANDLES
NOTESThere must be no faults present.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the condition and the connection of the door connector (tabs bent, broken, oxidised etc.).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the condition and connection of the PE3 connector of the UCH (tabs bent, broken, oxidised etc.).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check for an earth on connection MAM of component 1374.
Check for an earth on connection MAN of component 1375.
Check for an earth on connection MZ of component 1376.
Check for an earth on connection MAQ of component 1377.
If the connector or connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the insulation and continuity of the following connections:
●Connection code AP.
Between component 645 and 1374.
Between component 645 and 1376.
●Connection code AQ.
Between component 645 and 1375.
Between component 645 and 1377.
●Connection code MAM between component 1374 and earth.
●Connection code MAN between component 1375 and earth.
●Connection code MZ between component 1376 and earth.
●Connection code MAQ between component 1377 and earth.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET058/UCH_V48_ET058/ UCH_V4C_ET058/UCH_V4D_ET058/ UCH_V4F_ET058/UCH_V50_ET058/
UCH_V44_ET059/UCH_V48_ET059/ UCH_V4C_ET059/UCH_V4D_ET059/ UCH_V4F_ET059/UCH_V50_ET059