Page 4 of 48

82D-4V1 MR-376-X76-82D000$020.mif
82D
UCH
Vdiag No.: 0F
Electric central door locking:
Central locking and unlocking of the side door is dependent on the presence of the fuel tank cap sensor.
The doors can be centrally locked and unlocked using the CPE* button.
Luggage compartment lock:
The luggage compartment locking and unlocking command is provided by the UCH.
Front driver and passenger locks:
The front driver and passenger door locking and unlocking command is provided by the UCH.
Side door lock:
Central locking and unlocking of the side door is carried out by the UCH.
Transponder and radiofrequency key:
–the transponder in the key sends the following signals to the UCH:
– Key identifier signal.
– Immobiliser code signal.
The transponder is also involved in the Immobiliser function.
The radiofrequency key is used to transmit the key identifier information after pressing the button once. A
radiofrequency wave is sent to the UCH to carry out the user's request if the key is allocated to the vehicle (locking
or unlocking the doors and the tailgate).
Injection
When the authentication messages with the UCH have been exchanged, the injection can be unlocked and
authorise the starting of the engine.
The injection system is unlocked and engine starting is authorised as soon as the UCH has authenticated the
injection computer.
Electric window:
The driver has a one-touch electric window: a short press of the lowering button gives one-touch window lowering.
Another press stops the initial movement.
The passenger has a standard electric window.
CPE*: electric central door locking.
ACCESS - SECURITY
Fault finding – Role of components
Page 8 of 48
82D-8V1 MR-376-X76-82D000$030.mif
ACCESS - SECURITY
Fault finding – Operating diagram82D
UCH
Vdiag No.: 0F
Layout of the Access - Safety function
Access (RF*) and protection (engine immobiliser system) of the vehicle:
The access function (locking/unlocking) is provided by the UCH and the key.
Communication between the key and the UCH is made via radio frequency transmission at 433 MHz.
When the switch is pressed, the key sends out a radiofrequency wave signal. The UCH receives the signal via its
built-in aerial.
The UCH authenticates the key and carries out the user's request if the key is allocated to the vehicle.
Access via radiofrequency:
PROTECTION (Immobiliser)
RF*: Radiofrequency
Unité Centrale Habitacle (Passenger
Compartment Central Unit)
Key
– Authentication of the key
– Door locking system
Radio frequency
signals
Key +
transponderTransponder ring
Magnetic field used as communication
medium between the key transponder and the
transponder aerial
Page 10 of 48

82D-10V1 MR-376-X76-82D000$040.mif
ACCESS - SECURITY
Fault finding – Function82D
UCH
Vdiag No.: 0F
Locking / Unlocking
This system can function with up to four remote control units (the UCH can only manage four different codes).
The radio frequency signal receiver is integrated in the UCH.
The central door locking button is inhibited once the doors have been locked by the remote control.
Locking and unlocking the doors with the remote control is confirmed by the hazard warning lights flashing (if all the
doors are closed properly):
– locking: 2 flashes,
– unlocking: 1 flash.
Depending on the equipment level, unlock the doors and ensure that none of the doors is opened within the next
30 seconds otherwise the system will automatically re-lock the vehicle opening elements (without the hazard
warning lights flashing).
The UCH controls the vehicle interior lighting. If a courtesy light is left on, the UCH will cut the lighting supply after
a period of approximately 30 minutes.
The Top of the range version dims the light progressively after the doors have been closed by radio frequency
remote control.
Spare keys are supplied without a code or a number.
It is possible in the event of a key being stolen or lost or at the customer's request, for a vehicle key to be de-
allocated.
It can be reassigned to the same vehicle if necessary.Note:
Unlocking can be performed by the UCH, if the airbag computer has detected an impact or if it is faulty (see 88C,
Airbag - Seat belt pretensioners).
Page 13 of 48
82D-13V1 MR-376-X76-82D000$050.mif
ACCESS - SECURITY
Fault finding – Configuration82D
UCH
Vdiag No.: 0F
Access and Safety function configurations in the UCH
Configuration readings available using the diagnostic tool:
*RAID: Renault Anti-Intruder Device.
*CPE: Electric central door locking.
• Check the configurations in the Read configurations menu Equipment required:
CLIP diagnostic tool
Configuration
readingName of configuration Option Configuration
LC012Automatic relockingWITH OR WITHOUT
SC008 UCH type LC097Type of keyONE BUTTON or
TWO BUTTONS
LC113AirbagWITH OR WITHOUT
LC170RAID* function authorisation by diag
toolWITH OR WITHOUT
LC171Radiofrequency functionWITH OR WITHOUT
LC172Type of central door locking button
(CPE)*1 POSITION or 2
POSITIONS