wiring diagram RENAULT SCENIC 2008 J84 / 2.G Electrical Equipment - Multiplexing Workshop Manual

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MULTIPLEXING
Fault finding - Interpretation of faults
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V4 MR-372-J84-88B050$700_eng.mif
MULTIPLEXING
Fault finding - Interpretation of faults
FAULTY SEGMENT ON THE MULTIPLEX NETWORK
NOTESFirst check that the computer at the end of the faulty segment is properly
powered (earth, + battery, + accessories or + after ignition).
Always check the computer conformity.
If the Protection and Switching Unit computer is not detected, apply the appropriate
fault finding procedure (see 87G, Engine Compartment Connection Unit, Fault
Finding Chart, ALP1).
IMPORTANT
The tool may not be able to pinpoint the faulty segment(s) exactly. It then suggests
several segments that could be faulty. In this event, repair the segment closest to the
diagnostic socket.
Isolate the faulty segment by disconnecting both ends of the segment. Check the condition of the connections (see
Technical Note 6015A Repairing electrical wiring, Multiplex: Multiplex network, Repair).
Check the continuity and insulation of the multiplex line H and multiplex line L lines between the two connectors
on the isolated segment.
Refer to the vehicle's multiplex network diagram for the allocation of tracks on the computers and connections.
Perform the necessary operations to check the continuity of the two lines (for example, replacing the wiring).
Make sure that the computer present in the vehicle is compatible with the Scénic II ph2 and that the signals it is
producing are correct.
Reconnect the segment.
Run the multiplex network test again using the diagnostic tool.
Is the segment still declared faulty?
NoEnd of fault finding.
Are there other faulty segments?
Yes
NoTest the multiplex network again to check the continuity and
insulation of the multiplex line H and multiplex line L lines
between the end of the faulty segment and the diagnostic
socket at connections 133B and 133C (see diagnostic
socket diagram).
Apply the same procedure to each segment.
Yes
AFTER REPAIRRun the multiplex network test again using the diagnostic tool.
Clear the stored faults on all the computers connected to the network.
Deal with any other faults.
MR-372-J84-88B050$700_eng.mif

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MULTIPLEXING
Fault finding - Fault Finding Chart
88B
V4 MR-372-J84-88B050$900_eng.mif
MULTIPLEXING
Fault finding - Fault Finding Chart
ALP 1 No dialogue with computers
NOTESVehicle computer power supply for fault finding:
insert the vehicle card in the card reader.
Press and hold (over 5 seconds) the Start button in the absence of start conditions (for
example: selecting a gear).
Connect the diagnostic tool and perform the required operations.
IMPORTANT
To supply the discharge bulb computers, switch on the dipped headlights.
Use Technical Note Wiring diagram, Scénic II ph2.
Try the diagnostic tool on another vehicle.
Make sure the tool has a more recent update than CD 64.
Check:
–The connection between the diagnostic tool and socket (connection and cable in good condition).
–The computers' power supply.
–The engine compartment and passenger compartment fuses.
MR-372-J84-88B050$900_eng.mif

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MULTIPLEXING
Fault finding - Fault Finding Chart
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V4 MR-372-J84-88B050$900_eng.mif
ALP 1
CONTINUED 1
NOTESVehicle computer power supply for fault finding:
insert the vehicle card in the card reader.
Press and hold (over 5 seconds) the Start button in the absence of start conditions (for
example: selecting a gear).
Connect the diagnostic tool and perform the required operations.
IMPORTANT
To supply the discharge bulb computers, switch on the dipped headlights.
Use Technical Note Wiring diagram, Scénic II ph2.
Check that the CLIP sensor is supplied by the following connections: BP32 (+ 12 V), NAM and MAM (earths) on
the diagnostic socket. If the check is correct go to the next step according to the type of sensor used:
1. Renault fault finding sensor (with wire connection only):
displayed by the two red diodes on the sensor coming on.
Check that the CLIP sensor is supplied by the computer's USB port (red diode). If it is not, try with another cable,
another sensor or another clip in order to determine the defective component.
Make sure that the CLIP sensor is communicating properly with the vehicle's computers; this can be seen by the
two green diodes on the sensor lighting up. If not, check that the test conditions have been met (+ after ignition
feed, vehicle selection, etc.) otherwise apply the electrical checks below.
green LEDs red LEDs
multiplex line Vehicle supply through diagnostic socket
ISOSensor supply through USB port

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Fault finding - Fault Finding Chart
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ALP 1
CONTINUED 2
NOTESVehicle computer power supply for fault finding:
insert the vehicle card in the card reader.
Press and hold (over 5 seconds) the Start button in the absence of start conditions (for
example: selecting a gear).
Connect the diagnostic tool and perform the required operations.
IMPORTANT
To supply the discharge bulb computers, switch on the dipped headlights.
Use Technical Note Wiring diagram, Scénic II ph2.
2. Alliance fault finding sensor (with the possibility of a wireless connection):
Deal with the fault finding for each warning light in the following order of priority: from warning light 1 to warning light 3.
Description
of warning
lights
displayed on
the sensor
from left to
rightWarning light 1 shows
the supply statusWarning light 2 shows
the type and status of
the connectionWarning light 3 shows
the level of
communication with
the vehicleReserved
for the
Nissan tool
OffSensor not connected to
the vehicle or
connection faultNo connection to clip or
connection faultNo dialogue with the
computers-
GreenSensor supplied Wireless connectionGreen flashing:
communication in progress-
Orange-Connection with USB port - -
RedInitialisation fault - Communication error -
To be
checkedIf red or off:
–Fault with initialisation
or connections;
disconnect and
reconnect several
times and if there is
no conclusive result
try with another
sensor. If the sensor
works then replace
the sensorIf off:
–With a wireless
connection: Try with a
USB cable. If the
warning light is orange,
check the wireless
connection configuration
and if it is not correct,
call the Technical
Assistance (Techline).
–With a wired connection:
Try with another cable,
another clip or another
sensor in order to
determine the defective
component.If warning light 3 is off or
red and warning light 2 is
on:
–in this case, during the
multiplex network test
check that the green
warning light flashes and
that the test conditions
have been met (+ after
ignition feed, vehicle
selection, etc.) otherwise
apply the electrical
checks below.If the
warning
light is on:
Contact
Technical
Assistance
(Techline).

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Fault finding - Fault Finding Chart
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ALP 1
CONTINUED 3
NOTESVehicle computer power supply for fault finding:
insert the vehicle card in the card reader.
Press and hold (over 5 seconds) the Start button in the absence of start conditions (for
example: selecting a gear).
Connect the diagnostic tool and perform the required operations.
IMPORTANT
To supply the discharge bulb computers, switch on the dipped headlights.
Use Technical Note Wiring diagram, Scénic II ph2.
Check the following connections on the diagnostic socket:
BP 32 + battery feed
NAM and MAM Earth
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.
Computer connected to multiplex line V
If the fault is still present, check the continuity and the insulation of the following connections:
Multiplex line H (133B of component 225)
Multiplex line L (133C of component 225)
Use a multimeter to check that the voltages at the terminals of component 225 are approximately:
–2.5 V between multiplex line H (133B) and the earth (NAM and MAM) (Average values)
–2.5 V between multiplex line L (133C) and the earth (NAM and MAM) (Average values).
Refer to the Introduction - “Repair advice” to detect a short circuit on the vehicle's multiplex network.