2008 RENAULT SCENIC boot

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-22
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-22V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.1.13 Principle of automatic window relift:
When the doors are locked, and the lock button on the card is pressed twice in succession (or the door or boot if
the vehicle is fitted with hands-free function), the windows close automatically (as well as the sunroof, if fitted to
the vehicle).
The function is available on certain vehicles (see table below) depending on the number of one touch windows on
the vehicle and depending on the bodywork phases.
The automatic window relift function cannot be configured separately; it is automatically configured during special
command SC008 UCH type according to the vehicle type, number of one-touch windows and the production number
type.
1.1.14 Principle of new vehicle storage mode:
The vehicle is configured in this mode when it leaves the factory to optimise its power consumption:
–The immobiliser warning light is inhibited.
–The direction indicator warning lights are lit continuously on the instrument panel.
Before delivering the vehicle to the customer, deactivate this mode:
–By flipping down the steering column controls with the after ignition feed off.
–Or using command VP016 Deactivate new vehicle storage mode.
This function can only be activated in the factory with UCH Vdiag 4F or 50.If Then
Vehicle type One-touch window(s)Production
number typeFunction of automatic
window relift:
All except cabriolet phase 1 and 2
bodyworkWITHOUT WITHOUT
4-door phase 1 bodywork 1 driver OTW Jxxxxxx WITHOUT
4-door phase 1 bodywork 1 driver OTW OTHERS WITH
All except cabriolet and 4-door phase
1 bodywork1 driver OTW WITH
All except cabriolet phase 2 bodywork 1 driver OTW WITHOUT
All except cabriolet phase 1 and 2
bodywork2 or 4 OTW WITH
Cabriolet phase 1 and 2 bodywork WITHOUT WITHOUT

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-24
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-24V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
3) The UCH decrypts the response and compares it with that stored in its memory. If the result is correct, it continues
the starting procedure. The aerials stop transmitting once the card is authenticated.
If no Renault card responds in hands-free mode, the UCH interrogates the card reader. If the Renault card is in the
card reader, authentication is via transponder.
The card reader must be used to start in hands-free mode in the following situations:
–flat card battery,
–vehicle in an area of frequency interference,
–boot open (indication on instrument panel).
The statuses and commands available on the card authentication function:
–ET035 Radio frequency signal received.
–ET070 Start button.
–ET046 Immobiliser.
–ET014 Power supply level requested.
–AC036 Internal aerial testing.
b) Authentication of the Renault card when the vehicle is not fitted with the hands-free option:
When the user presses the start button, the UCH authenticates the card in the card reader using the transponder
mode (short-range data exchange at 125 KHz). The transponder mode does not require a battery in the card.
1Wire connection
2Card reader
3Short range TRANSPONDER connection
4Renault Card
The statuses and commands available on the card authentication function:
–ET070 Start button
–ET046 Immobiliser
–ET014 Power supply level requested

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-30
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-30V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
The handle groups are shown in the diagram below:
Communal sensor supply
Note:
The tailgate is not fitted with an infrared optical sensor. The boot and rear screen opening switches notify the UCH
of a request to open the boot or rear screen.
Optical
sensor
+
SwitchDriver's side
Passenger side
Optical
sensor
+
Switch
Optical
sensor
+
SwitchOptical
sensor
+
Switch
Boot unlocking

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-31
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-31V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.4.1.4 The access aerials built into the door handles and tailgate (hands-free vehicles):
The access aerials are built into the door handles and the tailgate. Only the boot aerial is removable.
The UCH activates these aerials in the following order:
–the side on which the handle has been pulled,
–if the card has not been detected, the UCH activates the aerials on the opposite side,
–if the card is still not detected, the UCH interrogates the rear aerial.
The access aerial groups are shown in the diagram below:
Note:
5-door versions manufactured before January 2007 and 3-door versions differ in that they have different handle
access aerials.
Note:
5-door versions manufactured after January 2007 have no access aerials in the rear door handles and have access
aerials in the front door handles identical to those in 3-door versions.
Driver's side
Passenger side
Tailgate

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-32
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-32V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.4.1.5 The locking switches built into the door handles and the tailgate badge (hands-free vehicles):
These switches are used to lock the opening elements. They are not removable, except for the tailgate switch which
is separate from the badge. When a switch is pressed, a UCH track is connected to earth, informing it of a vehicle
locking request. The access aerials are then activated.
The grouping of these switches is shown in the diagram below:
Driver's side Passenger side
Locking switch Locking switch
Locking switch Locking switch
Boot lid switch

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-34
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-34V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.4.2.3 The electric steering column lock:
The electric steering column lock is controlled by the UCH. The steering column lock works by inserting and
removing a lock bolt. It replaces the Neimann type lock.
The steering column lock is powered outside + after ignition feed. The steering column lock supply is via the after
ignition relay (located in the Protection and Switching Unit) in its rest position, from where it is distributed to the
column lock by the UCH.
The UCH sends an unlocking request and a code to the steering column lock, via the vehicle's multiplex network.
The multiplex network unlocks the steering column lock if the code is recognised.
A sensor located on the column lock bolt informs the UCH, via the multiplex network and by wire connection, that it
is unlocked.
When unlocking is confirmed, the UCH activates the + after ignition feed via the Protection and Switching Unit. The
column lock is no longer supplied.
The column lock has a "+ after ignition feed present on vehicle" wire signal which inhibits locking while the feed is
active.
1.4.2.4 The injection computer:
The injection computer is coded and unlocks following the encrypted challenge exchange with the UCH.
1.4.2.5 The starting aerials (hands-free vehicles):
There are 3 transmitter aerials located in the passenger compartment. They are controlled by the UCH to interrogate
the card during a starting request or in confirming the presence of the card in the vehicle (e.g. after a door is
opened).
The power used allows the whole passenger compartment to be covered, including the boot. Overspill outside the
passenger compartment is minimal.
1.4.2.6 The card reader:
The card reader is connected to the UCH by a wire connection. It provides the transponder function (like a key
recognition ring). It therefore allows authentication of a Renault card without a battery.
If the card is not detected or recognised during hands-free starting, the card reader flashes to tell the customer to
insert the Renault card.IMPORTANT IMPORTANT
The steering column lock is:
–not removable when the bolt is disengaged,
–fitted with a left-hand thread self-shearing mounting bolt.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B -105
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B -105V9 MR-372-J84-87B000$344.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
DF032
PRESENT
OR
STOREDBOOT EXTERNAL AERIAL
CO.1: Short circuit or open circuit to + 12 V
NOTESConditions for applying the fault finding procedure to a stored fault:
Activation of command AC037: Transmitter aerial fault finding; if the fault becomes
present, then carry out this fault finding procedure.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the condition and connection of the external boot aerial connector (tabs bent, broken, etc.).
If the connector is faulty and if there is a repair method (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, etc.).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the insulation and the continuity of the following connections:
●Connection code 26AM,
●Connection code 26AN.
Between components 645 and 1378.
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.
Replace the aerial if necessary.
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_DF032 /UCH_V48_DF032/UCH_V4C_DF032/
UCH_V4D_DF03 2/UCH_V4F_DF032/UCH_V50_DF032