8Electrical equipment
V1 MR-376-X76-82D000$TOC.mif
V1
82D
"The repair procedures given by the manufacturer in this document are based on the
technical specifications current when it was prepared.
The procedures may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from
which his vehicles are constructed."
V1
All rights reserved by Renault s.a.s.
Edition Anglaise
Copying or translating, in part or in full, of this document or use of the service part
reference numbering system is forbidden without the prior written authority of
Renault s.a.s.
© Renault s.a.s. 2013
ACCESS - SECURITY
UCH
Vdiag No.: 0F
Fault finding – Introduction 82D - 2
Fault finding – Role of components 82D - 4
Fault finding – Operating diagram 82D - 5
Fault finding – Function 82D - 9
Fault finding – Configuration 82D - 12
Fault finding – Programming 82D - 14
Fault finding – Fault summary table 82D - 17
Fault finding – Interpretation of faults 82D - 18
Fault finding – Conformity check 82D - 23
Fault finding – Status summary table 82D - 24
Fault finding – Interpretation of statuses 82D - 25
Fault finding – Parameter summary table 82D - 28
Fault finding – Interpretation of parameters 82D - 29
Fault finding – Command summary table 82D - 30
Fault finding – Interpretation of commands 82D - 31
Fault finding – Customer complaints 82D - 37
Fault finding – Fault finding chart 82D - 38
82D-9V1 MR-376-X76-82D000$040.mif
82D
UCH
Vdiag No.: 0F
Engine immobiliser
The immobiliser function is divided between three coded computers (the UCH, the injection computer and the key).
The key and the UCH are linked by a magnetic field which is created by the transponder ring.
When the + After ignition is switched on, the key sends its identifier to the UCH via the transponder ring, located on
the ignition switch. The UCH runs through an authentication procedure with the key via the transponder ring. If the
key is allocated to the vehicle, then operation of the starter motor is authorised and the injection system is unlocked.
The injection computer has no reference code in its memory: the code which is transmitted is stored.
If the key code and the UCH code do not match, the system remains locked. The red engine immobiliser warning
light flashes (quickly). The vehicle cannot be started.
If the anti-theft tracking unit is fitted to the vehicle and the does vehicle not start, the customer should be asked the
following questions. This is to ensure that the information given by their access supplier via GSM conform with what
is noted in the computer:
– Who is your vehicle detection service supplier?
– Which activation option did you choose? (with locating system/without locating system)
– Did you request remote blocking? (If yes, this is why the engine does not start).
If the vehicle detection service cannot be activated, ask the owner:
– What is the server name of the vehicle detection service supplier?
– What is the APN address of the vehicle detection service supplier?
This is to ensure that the information given by their access supplier via GSM conform with what is noted in the
computer.
Recognition of keys in normal operationIMPORTANT
When the vehicle battery has a low charge, the drop in voltage caused by operating the starter could reactivate the
immobiliser. If the voltage is too low, the engine cannot be started, even by pushing the vehicle.
IMMOBILISER WARNING LIGHT
Vehicle protected (without After Ignition) Indicator light flashes at 1 Hz
Key recognised, injection protection liftedWarning light continuously illuminated for
3 seconds and then goes out
Key not recognised, injection protected Warning light flashes at 4 Hz
ACCESS - SECURITY
Fault finding – Function
