2008 RENAULT SCENIC check engine light

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-11
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-11V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
f/ Display:
Unlocking is indicated by 1 flash of the direction indicators.
Locking is indicated by 2 flashes of the direction indicators.
When using the "boot status toggle" switch, display is not performed if a toggle request is made when the vehicle is
completely unlocked. In fact, in this case, the vehicle is not locked as only the boot is locked.
If one of the opening elements is detected as open when the request for locking the vehicle is made, the UCH will not
authorise vehicle locking and no indicators will flash to warn the user.
1.1.2 procedure of locking/unlocking by pressing the central door locking button:
This button is used to lock/unlock the vehicle while stationary or moving.
This button has no effect if the vehicle has been locked using the card in hands-free or manual mode.
Pressing the electric central door locking button when a door is unlocked will lock all the doors and the electric
central door locking indicator light will light up. Status ET044 CPE* button may be used to check that the button is
operating correctly.
The operation of the electric central door locking indicator light can be checked using command mode AC020 CPE*
button indicator light.
1.1.3 Principle of automatic locking when driving (RAID* system):
The Automatic Locking when Driving (RAID) function locks the vehicle as soon as the speed signal is above
approximately 4 mph (7 km/h).
Activation or deactivation of the RAID function can be viewed using ET043 RAID* function authorisation by CPE*.
The RAID function can be activated or deactivated by pressing and holding the electric door locking button for
approximately 5 seconds while the engine is running. Acknowledgement is indicated by a buzzer.
1.1.4 Principle of automatic relocking:
Automatic relocking takes place 2 minutes after hands-free or card unlocking if unlocking is not followed by the
opening of a door.
CPE*: Electric central door locking
RAID*: Renault Anti-Intruder Device Note:
Unlocking can be performed by the UCH if the airbag computer has detected an impact or if it is faulty (not
recognised on the multiplex network, internal fault, etc.). (see 88B, Multiplexing).

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-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 - Configurations and programming
87B
87B-63
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Configurations and programming
87B
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 - Conformity check
87B
87B -134
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -134V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
FUNCTION: TYRES
Sub-function: Tyre display
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
Tyre displayET039:STOP warning light
on request ACTIVE
INACTIVEACTIVE, if a puncture is
detected.
There is a buzzer
activation request for all
severity level 1
warnings (puncture).
The buzzer emits a
single beep when a fault
occurs.
ET016:Buzzer activation
requestINACTIVE
STATUS 1
STATUS 2
INCONSISTENCY 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.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -135
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -135V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
LIGHTING FUNCTION
Sub-function: Lighting command
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
Lighting
controlET081:Lighting switch
positionOFF
SIDE
DIPPED
MAIN BEAM HEADLIGHTS
HAZARD LIGHTS In the event of a fault,
refer to the
interpretation of status
ET081.
ET115:Request to switch
on lights by light
sensor PRESENT
ABSENTIn the event of a fault,
consult the
interpretation of status
ET115.
ET169:EngineSTOPPEDIn the event of a fault,
refer to the
interpretation of
status ET169.
ET113:Automatic lighting
button DEPRESSED
RELEASED In the event of a fault,
consult the
interpretation of
status ET113.
ET111:Front fog lights
requestPRESENT
ABSENT In the event of a fault,
consult the
interpretation of
status ET111.
ET082:Rear fog lights
requestPRESENT
ABSENT In the event of a fault,
consult the
interpretation of
status ET082.
ET085:Hazard warning
lights buttonDEPRESSED
RELEASED In the event of a fault,
refer to the
interpretation of
status ET085.
ET083:Left-hand indicator
requestPRESENT
ABSENT In the event of a fault,
refer to the
interpretation of
status ET083.
ET084:Right-hand indicator
requestPRESENT
ABSENT In the event of a fault,
refer to the
interpretation of
status ET084.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -138
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -138V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
LIGHTING FUNCTION
Sub-function: Lighting power
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
Lighting powerET112:Interior lighting
controlACTIVE
INACTIVENone

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart
87B
87B -368
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart
87B
87B -368V9 MR-372-J84-87B000$989mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ALP43 The vehicle fails to start and goes into after ignition feed
NOTESCheck the voltage of the battery.
Carry out a fault finding procedure on the function.
Make sure the start-up conditions are met (no gear engaged).
The engine immobiliser warning light can be used to check if the injection is still
protected (lit continuously).
Check the conformity of the antitheft and starting components.
Check that status ET110 UCH request to injection or UPC is START if the start-up conditions are met when
the start button is pressed.
If there is a fault, see the procedure for this status.
If everything is ok, run fault finding on the ignition circuit in the Protection and Switching Unit.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
UCH_V44_ALP43 /UCH_V48_ALP43/UCH_V4C_ALP43/
UCH_V4D_ALP43/UCH_V4F_ALP43/UCH_V50_ALP43