RENAULT SCENIC 2008 J84 / 2.G Electrical Equipment - Network Interface Unit BIC Workshop Manual

8Electrical equipment
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"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. 2008
MULTIMEDIA NETWORK INTERFACE UNIT
BIC
Vdiag No.: 14
Fault finding – Introduction 86D - 2
Fault finding – List and location of components 86D - 8
Fault finding – Role of components 86D - 10
Fault finding – Operating diagram 86D - 11
Fault finding – Function 86D - 13
Fault finding – Configurations and programming 86D - 14
Fault finding – Replacement of components 86D - 15
Fault finding – Fault summary table 86D - 16
Fault finding – Interpretation of faults 86D - 17
Fault finding – Conformity check 86D - 25
Fault finding – Status summary table 86D - 29
Fault finding – Interpretation of statuses 86D - 30
Fault finding – Parameter summary table 86D - 34
Fault finding – Command summary table 86D - 35
Fault finding – Customer complaints 86D - 36
Fault finding – Fault Finding Chart 86D - 37

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1. SCOPE OF THIS DOCUMENT
This document presents the fault finding method applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this document):
–Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
–Visu - Schéma.
Type of diagnostic tools
–CLIP
Special tooling required
3. REMINDER
Procedure
Scénic II Phase 2: To run fault finding on the vehicle computers, switch on the forced + after ignition feed.
Proceed as follows:Vehicle(s): Espace IV Phase 2, Scénic II
Phase 2Name of computer: Multimedia network
interface unit
Function concerned: Interface between the
vehicle and multimedia networksVdiag No.: 14
Special tooling required
Multimeter
Ele. 1481Bornier
Elé. 1681 Universal bornier
Switch on the forced + after ignition feed:
–with the vehicle card in the card reader,
–press and hold the Start button (longer than 5 seconds) with start-up conditions not fulfilled,
–connect the diagnostic tool and perform the required operations.
BIC_V14_PRELI
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Procedure (continued)
Espace IV Phase 2: To save energy, the UCH on the Espace IV Phase 2 cuts out the + after ignition feed after
3 minutes.
To run fault finding on a computer, it is possible to force the + after ignition feed for 1 hour by applying the following
procedure:
–Press the card unlocking button.
–Insert the card into the reader.
–Press the Start button (interrupting the timed + after ignition feed mode).
–Press and hold the Start button for over 5 seconds until the engine immobiliser warning light starts to flash rapidly
(4 Hz).
This forced + after ignition feed mode remains active for 1 hour.
Pressing the Start button or removing the card from the card reader cuts off the + after ignition feed but does not cut
off the forced after ignition feed timed mode. Until one hour has elapsed, activating the + after ignition feed will
restart forced + after ignition feed for the remaining time.
Faults
Faults are displayed as present or stored (they appeared in a certain context and have since disappeared, or they
are still present but cannot be diagnosed in the current context).
The present or stored status of faults should be considered when using the diagnostic tool after the + after ignition
feed is switched on (without any action on the system components).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the
fault.
If the fault is not confirmed, check:
–the electrical lines which correspond to the fault,
–the connectors on these lines (corrosion, bent pins, etc.),
–the resistance of the component detected as faulty,
–the condition of the wires (melted or split insulation, wear). Switching off the forced + after ignition feed:
Press the Start button twice briefly (less than 3 seconds).
Ensure that the + after ignition feed has been cut off by checking that the computer warning lights on the instrument
panel have gone out.

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Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool when the data
is inconsistent. Therefore, this stage is used to:
–carry out fault finding on faults that do not have a fault display, and which may correspond to a customer complaint.
–check that the system is operating correctly and that there is no risk of a fault recurring after repair.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is correct but the customer complaint is still present, the fault should be
processed by customer complaints.
A summary of the overall procedure to follow is provided on the following page in
the form of a flow chart

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4. FAULT FINDING PROCEDURE
Perform a pre-diagnostic on the
system
Print the system fault finding log
(available on CLIP
and in Repair Manual or
Technical Note)
Connect CLIP
See ALP no. 1
Read the faults
Deal with present faults
Deal with stored faults
Conformity check
(interpretation of statuses and

parameters)
Use fault finding charts (ALPs)
Dialogue with
computer?
Faults
present
The cause is
still present
The cause is
still presentThe cause is
still present
Contact the Techline with the
completed fault finding log
No
NoNo
No No
Yes
Yes
Yes
Fault
solvedFault
solved Fault
solved

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4. FAULT FINDING PROCEDURE (continued)
Wiring check
Fault finding problems
Disconnecting the connectors and/or manipulating the wiring may temporarily remove the cause of a fault.
Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not
present when the analysis is made (stored fault).
Visual inspection
Look for damage under the bonnet and in the passenger compartment.
Carefully check the fuses, insulators and wiring harness routing.
Look for signs of oxidation.
Physical inspection
While manipulating the wiring, use the diagnostic tool to note any change in fault status from stored to present.
Make sure that the connectors are properly locked.
Apply light pressure to the connectors.
Twist the wiring harness.
If there is a change in status, try to locate the source of the fault.
Inspection of each component
Disconnect the connectors and check the appearance of the clips and tabs, as well as the crimping (no crimping on
the insulating section).
Make sure that the clips and tabs are properly locked in the sockets.
Check that no clips or tabs have been dislodged during connection.
Check the clip contact pressure using an appropriate model of tab.
Resistance check
Check the continuity of entire lines, then section by section.
Look for a short circuit to earth, to +12 V or to another wire.
If a fault is detected, repair or replace the wiring harness.

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5. FAULT FINDING LOG
You will always be asked for this log:
–when requesting technical assistance from the Techline,
–when requesting approval before replacing parts for which approval is compulsory,
–to be attached to monitored parts for which reimbursement is requested. The log is needed for warranty
reimbursement, and enables better analysis of the parts removed.
6. SAFETY INSTRUCTIONS
Safety rules must be observed during any work on a component to prevent any material damage or personal injury:
–check the battery voltage to avoid incorrect operation of computer functions,
–use the proper tools. IMPORTANT!IMPORTANT
All faults involving a complex system call for thorough diagnostics with the appropriate tools. The
FAULT FINDING LOG, which should be completed during the fault finding procedure, ensures a
record is kept of the procedure carried out. It is an essential document when consulting the
manufacturer.
IT IS THEREFORE ESSENTIAL THAT THE FAULT FINDING LOG IS FILLED OUT EVERY TIME IT IS
REQUESTED BY TECHLINE OR THE WARRANTY RETURNS DEPARTMENT.

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Location of the Multimedia interface unit in the passenger compartment of Espace IV Phase 2
Location of the Multimedia interface unit in the passenger compartment of Scénic II Phase 2
MULTIMEDIA NETWORK INTERFACE UNIT
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Multimedia interface unit connections

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Role of main components
–Multimedia network interface unit: enables information to be exchanged between the "vehicle" and "multimedia"
multiplex networks.
The multimedia network interface unit receives various signals from the vehicle CAN (speed, status of exterior
lights) and retransmits them for the radio via the Multimedia CAN.
The multimedia network interface unit transmits the activation signal to the radio and to the other computers
participating in the multimedia function when the user switches on the radio or starts the vehicle.
–Display: displays various multimedia system data such as the station selected, time, CD listing and satellite
guidance information.
–Steering column switch: provides access to various functions of the multimedia system.
–Speakers: relay the sound from the multimedia system into the vehicle.
–CD changer: enables compact discs to be loaded and music to be relayed to the receiver.
–AM/FM aerial: receives radio signals.
–GPS aerial: receives various data transmitted by satellites.
–Radio/navigation computer: manages the various multimedia system functions according to user requests and
transmits audio data to the vehicle via the speakers.
–AM/FM aerial amplifier: improves the reception of AM and FM signals.
MULTIMEDIA NETWORK INTERFACE UNIT
Fault finding – Role of components