2010 RENAULT SCENIC fault

62A - 9
AIR CONDITIONING
Fault finding - Mode of operation62A
V4MR-372-J84-62A000$010.mif
Exchanges between the four air conditioning system computers
–air conditioning request 1 (compressor
engagement)
–switch on passenger compartment heating
resistors (RCH) request
–switch on heated rear screen request
(+ electric door mirrors)
–passenger compartment ventilation signal
Climate
control panelUCH
–passenger compartment heating resistors (RCH)
operation management
–exterior temperature signal
–engine coolant temperature signal
–switch on heated rear screen request
(+ electric door mirrors)
UCHUPC
(Power and Switching Unit)
–alternator charge signal
–number of passenger compartment heating
resistors authorised by alternator
–air conditioning request 2 (compressor
engagement)
–fast idle request for passenger compartment
heating resistors (RCH)
UCHInjection computer
–compressor engagement authorisation
–engine coolant temperature signal
–refrigerant fluid pressure signal
–number of passenger compartment heating
resistors authorised by injection
–compressor engagement request
–switch on engine cooling fan request
Injection computerUPC
(Power and Switching Unit)
–alternator charge signal
Manual air conditioning
and
Climate control
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$040.mif

62A - 10
AIR CONDITIONING
Fault finding - Mode of operation62A
V4MR-372-J84-62A000$010.mif
Manual air conditioning
and
Climate control
CLIM X84 1.1
Edition 2
Summary of components controlled or managed by the climate control computer
Ventilation and climate control unit
Passenger
compartment
blower
Vehicle multiplex
network
Passenger
compart-
ment blower
power
module
Recir-
culation
motorDistribution
motorMixing
motorInterior
temperature
sensor Solar radiation
sensor
Actuator control Sensor management
Climate control computer (control panel)
Climate control
management
(hot and cold)User requests
management
(buttons pressed) Button lighting
Key:
Wire connections =
Multiplex connections =
MR-372-J84-62A000$040.mif

62A - 11
AIR CONDITIONING
Fault finding - Mode of operation62A
V4MR-372-J84-62A000$010.mif
Manual air conditioning
and
Climate control
Summary of components controlled or managed by the manual air conditioning computer
Ventilation and climate control unit
Passenger
compartment
blower
Resistor
unitRecircu-
lation flapDistribution
flapMixing
flap
Vehicle multiplex
network
Actuator control
Manual air conditioning computer
(control panel)
Button lights
(air conditioning button
and heated rear screen
button)Passenger
compartment blower
operation signal
(running or stopped)User request
management
(air conditioning button
and heated rear screen
button pressed)
UCH
Transmission of requests
(air conditioning, heated
rear screen)
Key:
Wire connections =
Multiplex connections =
Mechanical connections =
(cable controls)
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$040.mif

62A - 12
AIR CONDITIONING
Fault finding - Mode of operation62A
V4MR-372-J84-62A000$010.mif
Manual air conditioning
and
Climate control
Block diagram of components controlled or managed by the control panel of heater
versions without air conditioning
Ventilation unit
Passenger
compartment
blower
Resistor
unitRecircu-
lation flapDistribution
flapMixing
flap
Vehicle multiplex
network
Actuator control
user control panel
Button lights (heated rear
screen button)Passenger
compartment blower
operation signal
(running or stopped)User request
management (heated
rear screen button
pressed)
UCH
Transmission of the request
to switch on the heated rear
screen
Key:
Wire connections =
Multiplex connections =
Mechanical connections =
(cable controls)
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$040.mif

62A - 13
AIR CONDITIONING
Fault finding - Mode of operation62A
V4MR-372-J84-62A000$010.mif
Summary of components controlled or managed by the UCH
Summary of components controlled or managed by the Protection and Switching Unit
Passenger
compartment
heating
resistors (RCH)
relay No. 2 Passenger
compartment
heating
resistors (RCH)
relay No. 1 Passenger compartment
heating resistors (RCH)
relay No. 3 (Scénic only)Exterior
temperature
sensor
Vehicle
multiplex
network
Actuator control Sensor management
UCH
Air conditioning request
managementHeated rear screen
control
managementPassenger compart-
ment heating resistor
control management
Engine cooling
fan unitHeated rear
screen and
heated door
mirrorsClimate control
compressorAlternator:
"DF"
terminal
Actuator control Electrical availability management
UPC
"DF" terminal signal formatting
(alternator charge)
Key:
Wire connections =
Multiplex connections =
Manual air conditioning
and
Climate control
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$040.mif

62A - 14
AIR CONDITIONING
Fault finding - Mode of operation62A
V4MR-372-J84-62A000$010.mif
Manual air conditioning
and
Climate control
Summary of components controlled or managed by the injection computer
Refrigerant fluid
pressure sensorEngine coolant
temperature
sensorVehicle
multiplex
network
Sensor management
Engine injection computer
Management of the cold loop (refrigerant fluid pressure,
switch on engine cooling fan request, compressor
engagement authorisation, etc.)Passenger compartment
heating resistors (RCH)
authorised power
management
Key:
Wire connections =
Multiplex connections =
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$040.mif

62A - 15
AIR CONDITIONING
Fault finding - Mode of operation62A
V4MR-372-J84-62A000$010.mif
Manual air conditioning
and
Climate control
Compressor control flowchart
ET143 Air
conditioning request 1
(climate control)Climate control panelET029 Air
conditioning button
(manual air
conditioning)
ET030 Air
conditioning request 2UCH
ET088 Compressor
engagement requestInjection computer
ET004 Air conditioning
authorisation
UPC
(Power and Switching Unit)
Control via wire
connection
Special notes:
This flowchart shows the path of the
compressor engagement request.
Components which may block this request
are not listed (passenger compartment
blower operation signal for the UCH on
manual air conditioning version, correct
refrigerant fluid pressure for the injection,
etc.).
If the compressor does not engage (one of
the requests not transmitted): carry out a
conformity check. Climate
control
compressor
Key:
Multiplex signals.
Wire connections.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$040.mif

62A - 16
AIR CONDITIONING
Fault finding - Configurations and configuration reading62A
V4
Manual air conditioning
and
Climate controlAIR CONDITIONING
Fault finding - Configurations and configuration reading
Climate control system configurations
Climate control system configuration readings
Computers Configuration Option Comment
Air conditioning (climate
control computers only)CF044 Vehicle type B84/L84/J84/E84 Manual configuration
(with CLIP)
CF117 Type of heating
resistorsWithout/1000 W/
1800 W
UCH SC008 Type of UCH Configuration scenario
(possible to register all the
UCH functions).
Injection (all types)
XXAutomatic computer
configuration
Protection and Switching
UnitCF001 Type of alternator – KCB1 90 BOSCH
–TG11 110 VALEO
–SG12 VALEO
–LIE8 150 BOSCH
–SG15L VALEO
–Other typeManual configuration
(with CLIP)
Computers Configuration reading Option Comment
Climate control LC013 Vehicle type B84/J84/E84 None
LC043 Heating resistor without/1000 W/
1800 W
UCH LC013 Type of air conditioning climate control/
manual/heatingNone
LC030 Type of heating resistorswithout/1000 W/
1500 W
LC011 Vehicle type All except E8h
S3000 injection
NOTE: These
functions are
only valid for the
S3000 injection
(K4J/K4M/F4R
and F4R
Turbocharged
enginesLC009 Air conditioning connected/not
connectedFollowing the first
compressor engagement
request:
LC009 connected
LC016 With LC016 Air conditioning pressure
signal managementwith/without
ET079 Air conditioning present yes/no ET079
LC025 Heating resistor with/without None
Protection and
Switching UnitLC001 Type of alternator – KCB1 90 BOSCH
–TG11 110 VALEO
–SG12 VALEO
–LIE8 150 BOSCH
–SG15L VALEO
–Other typeNone
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$050.mif