sensor RENAULT SCENIC 2009 J84 / 2.G Air Conditioning Climate Control Workshop Manual

62B - 4
CLIMATE CONTROL
Fault finding – Introduction62B
V3 MR-372-J84-62B000$010.mif
Vdiag No.: 44
The conformity check for the air conditioning function is split into two parts:
1/ All information relating to the sensors and actuators controlled by the climate control panel (distribution motor,
mixing motor, recirculation motor, passenger compartment ventilation, etc.) is given in the conformity check for this
section.
2/ All information relating to the air conditioning function (information provided by several computers) is given in
the conformity check in section 62A Air conditioning.
Customer complaints - Fault finding chart
If the diagnostic tool check is correct, but the customer complaint persists, it should be dealt with according to the
Customer complaint.Note:
The interpretation of statuses, parameters and commands is also split into several sections. Everything which is
controlled by the control panel of the climate control function is dealt with in this section. However, signals from other
computers are interpreted in the fault finding sections of the computers which produce these signals.
A synopsis of the general procedure to follow is provided on the following
page in the form of a flow chart.
ACREG X84 1.1
Edition 2

62B - 7
CLIMATE CONTROL
Fault finding – System operation62B
V3 MR-372-J84-62B000$020.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – System operation
GENERAL INFORMATION:
The climate control system fitted on the SCENIC is controlled by four computers. This system is called a
DISTRIBUTED FUNCTION. Fault finding on the climate control is performed in two different ways using the
diagnostic tool. The first method consists of performing fault finding on each computer which allows
communications to be established with just one computer (select the climate control computer). The second
procedure consists of performing fault finding on each function which allows communications to be established
with all four computers of the AIR CONDITIONING function. These two fault finding methods are described in the
introduction of this repair manual.
DESCRIPTION OF THE OPERA
TION OF THE CLIMATE CONTROL COMPUTER:
The climate control computer controls the passenger compartment ventilation, the distribution motor, the mixing
motor and the recirculation motor.
The climate control computer also controls two sensors, these being the interior temperature sensor and the solar
radiation sensor.
The two sensors and the three motors are connected to the climate control computer by wire connections. The
climate control computer controls the passenger compartment ventilation using a modulated control signal (square
signal) sent to a power module (wire connection).
All other signals used by the climate control computer or transmitted by this computer to other computers are sent on
the multiplex network.
Cold air production (cold loop) and warm air production (heating) are controlled by the other three computers
involved in the Air conditioning function (UCH, protection and switching unit and injection computer).
The main signals used by the climate control computer are:
–+ 12 V sidelights,
–0 V rheostat controlled,
–exterior temperature,
–engine coolant temperature,
–engine operating status,
–engine speed,
–electrical power consumed,
–request to set the blown air temperature.
OPERA
TING NOTES:
–When the engine is switched off, the passenger compartment blower unit operates approximately 30% slower than
the requested speed (control panel setting).
–If any of the actuators are faulty, the air conditioning can no longer control them, but the setting requests are still
displayed on the control panel: warning lights light up, display of symbols on the control panel (distribution motor
position, passenger compartment blower speed, AC symbol, etc.).
–If the exterior temperature sensor is faulty, the climate control computer is switched on 5 seconds after the
ignition is switched on (this allows a fault to be identified as fault finding cannot be performed on the exterior
temperature sensor by the UCH).
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$020.mif

62B - 8
CLIMATE CONTROL
Fault finding – System operation62B
V3 MR-372-J84-62B000$020.mif
Vdiag No.: 44
SUMMARY OF ITEMS CONTROLLED OR OPERATED BY THE CLIMATE CONTROL COMPUTER:
Ventilation and air conditioning unit
Passenger
compartment
blower
Vehicle multiplex
network
Passenger
compartment
blower power
moduleRecirculatio
n motorDistribution
motorMixing
motorInternal
temperature
sensor Solar 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 =
ACREG X84 1.1
Edition 2

62B - 9
CLIMATE CONTROL
Fault finding – Allocation of computer tracks62B
V3 MR-372-J84-62B000$030.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Allocation of computer tracks
Allocation of climate control computer tracks.
Computer
tracksFunctions Sensor - actuator tracks
Connector A
1CAN L
2not used
3not used
4solar sensor signal track 2 of the solar sensor
5interior temperature sensor signal track 4 of the interior temperature sensor
6computer earth
7CAN H
8not used
9+ 12 V side lightsleft-hand side light fuse in the Protection and Switching
Unit (7.5 A)
10 + 12 V accessories feed passenger compartment fuse (15 A)
11 + 12 V before ignition feed passenger compartment fuse (20 A)
12 0 V sensors (solar, interior temperature)track 1 of the solar sensor and track 5 of the interior
temperature sensor
Connector B
1recirculation motor control track 5 of the recirculation motor
2not used
3not used
4not used
5not used
6not used
7passenger compartment blower module
controltrack 6 of the passenger compartment blower module
6-track connector
812 V supply of the mixing and distribution
motorstrack 2 of the mixing and distribution motors
9not used
10 recirculation motor control track 6 of the recirculation motor
11 distribution motor control track 1 of the distribution motor (coil B2)
12 distribution motor control track 6 of the distribution motor (coil A2)
13 distribution motor control track 3 of the distribution motor (coil B1)
14 distribution motor control track 4 of the distribution motor (coil A1)
15 mixing motor controltrack 1 of the mixing motor for B and C84 and track 3
of the mixing motor for J84 (B2 winding)
16 mixing motor control track 6 of the mixing motor (A2 winding)
17 mixing motor controltrack 3 of the mixing motor for B and C84 and track 1
of the mixing motor for J84 (B1 winding)
18 mixing motor control track 4 of the mixing motor (A1 winding)
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$030.mif

62B - 13
CLIMATE CONTROL
Fault finding – Summary of faults62B
V3 MR-372-J84-62B000$050.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Summary of faults
SUMMARY OF SENSORS AND ACTUATORS ON WHICH FAULT FINDING CAN BE
PERFORMED BY THE CLIMATE CONTROL COMPUTER (with corresponding design
office codes).
FAULT NAMES DTC CODES
DF001 Computer 91 05
DF007 Interior temperature sensor circuit 91 01
DF010 Mixing motor circuit 91 07
DF012 Distribution motor circuit 91 08
DF021 Recirculation motor circuit 91 06
DF026 Solar sensor circuit 91 02
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$050.mif

62B-15
CLIMATE CONTROL
Fault finding – Interpretation of faults62B
V3 MR-372-J84-62B000$060.mif
Vdiag No.: 44
DF007
PRESENT
OR
STOREDINTERIOR TEMPERATURE SENSOR CIRCUIT
CC.0 : Short circuit to earth
CO.1 : Short circuit or open circuit to + 12 V
NOTESConditions for applying the fault finding procedure to stored faults:
Apply this fault finding procedure if the fault appears as present or stored again after:
–switching on the ignition and switching on the climate control.
Special notes:
The internal temperature sensor (linked to a micro-turbine, depending on vehicle
equipment) is located at the top of the roof in the unit underneath the rear view mirror.
Check the connection and condition of the internal temperature sensor connector.
Replace the connector if necessary.
With the ignition on ("forced" + after ignition: see Introduction), check that the temperature sensor micro-
turbine is working correctly.
If it is not working, check for the presence of +12 V on track 1 of the temperature sensor connector and an
earth on track 3.
If the micro-turbine supply is correct and the micro-turbine does not operate, replace the component: sensors
+ micro-turbine (the micro-turbine is not available as a separate part).
Disconnect connector A (12-track) from the climate control computer in order to check the insulation,
continuity and absence of interference resistance on the connections:
Computer connector A track 5 Track 4 of the internal temperature sensor
Computer connector A track 12 Track 5 of the internal temperature sensor
Track 1 of the solar radiation sensor
Repair if necessary.
Check the resistance value of the sensor between:
track 4 and track 5 of the internal temperature sensor connector. Replace the sensor if the resistance is not:
10 kΩΩ Ω Ω

±± ± ±
500 ΩΩ Ω Ω
at 25˚C (for more details, refer to the electrical specifications of the sensor according to
temperature in the Help section).
If the fault is still present, replace the internal temperature sensor.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline): reconfigure the
computer (see section Configurations and Programming).
Deal with any other faults.
ACREG X84 1.1
Edition 2

62B-21
CLIMATE CONTROL
Fault finding – Interpretation of faults62B
V3 MR-372-J84-62B000$060.mif
Vdiag No.: 44
DF026
PRESENT
OR
STOREDSOLAR RADIATION SENSOR CIRCUIT
CC.0 : Short circuit to earth
CO.1 : Short circuit or open circuit to + 12 V
NOTESConditions for applying the fault finding procedure to stored faults:
Apply this fault finding procedure if the fault appears as present or stored again after:
–clearing the fault and switching the ignition off then back on.
Special notes:
The solar sensor (a little black button) is located on top of the dashboard, on the
windscreen side.
Check that the solar sensor is not "shaded" by any objects (nothing should be placed on top of the sensor).
Check the connection and condition of the solar radiation sensor connector.
Replace the connector if necessary.
Disconnect connector A (12-track) from the climate control computer in order to check the insulation,
continuity and absence of interference resistance of the connections:
Computer connector A track 4 Track 2 of the solar radiation sensor
Computer connector A track 12 Track 1 of the solar radiation sensor
Track 5 of the internal temperature sensor
Repair if necessary.
With the ignition on, the solar radiation sensor electrically connected and the climate control panel on, ensure
that the solar radiation sensor supplies a voltage (signal) to the climate control computer.
To find out the voltage that the sensor should be supplying as a function of solar radiation intensity, consult the
interpretation of this parameter (Interpretation of parameters section).
If the fault is still present, replace the solar radiation sensor.
AFTER REPAIRClear the fault memory.
Deal with any other faults.
ACREG X84 1.1
Edition 2

62B - 28
CLIMATE CONTROL
Fault finding – Interpretation of parameters62B
V3 MR-372-J84-62B000$080.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Interpretation of parameters
PR001
INTERIOR TEMPERATURE
NOTESNone.
The climate control computer receives the interior temperature signal through a wire connection.
To ensure this parameter is correct (without using a thermometer), simply read the temperature information
when the vehicle is cold (in the morning). The interior temperature, the exterior temperature and the engine
coolant temperature should be practically the same.
Another way of checking whether this sensor is correct is to check the resistance value of the sensor according
to temperature: refer to the electrical specifications of the sensor in the Help section.
If the temperature displayed by this parameter seems to be incorrect, apply the fault finding procedure for fault:
DF007 Interior temperature sensor circuit.
AFTER REPAIRRepeat the conformity check from the start.
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$080.mif

62B - 29
CLIMATE CONTROL
Fault finding – Interpretation of parameters62B
V3 MR-372-J84-62B000$080.mif
Vdiag No.: 44
PR006
SOLAR RADIATION
NOTESNone.
The solar sensor is used to improve the comfort level of the air conditioning according to the windscreen solar
radiation.
This sensor measures the solar radiation level and transmits the information to the climate control computer
in the form of a measurement in W/m
2. This measurement ranges from 0 to 400 W. The sensor is faulty if it
gives a value of 400 W although the vehicle is in the shade (in the workshop) as this value equals maximum
solar radiation.
If the value displayed by this parameter seems to be incorrect: check the signal transmitted by the sensor
based on the solar radiation, by measuring between track 2 of the sensor and earth (solar sensor connected
electrically, ignition on and control panel on).
0 W 4.91 V
50 W 4.28 V
100 W 3.70 V
200 W 2.55 V
300 W 1.40 V
400 W 0.30 V
If the fault is still present, apply the fault finding procedure for fault: DF026 Solar sensor circuit.
AFTER REPAIRRepeat the conformity check from the start.
ACREG X84 1.1
Edition 2

62B - 35
CLIMATE CONTROL
Fault finding – Conformity check62B
V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Conformity check
PASSENGER COMPARTMENT VENTILATION SUB-FUNCTION
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine off, ignition on (forced 12 V After ignition).
Air conditioning off
(air conditioning compressor not triggered).
Special note:
The various conformity checks
for the air conditioning function are explained in the
Introduction section.
Note:
–Read the parameters when the vehicle is cold (in the morning) to check the
conformity of the temperature parameters (without thermometer). The two
temperatures should be practically the same (as should the coolant temperature
given by the injection system).
–The invalid values given in this check correspond to the value sent by the diagnostic
tool (substitute value) when the sensor in question is faulty. A sensor fault can be
detected when these invalid values are displayed (this is an important point for
sensors on which fault finding cannot be performed, e.g. exterior temperature
sensor).
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1TemperaturesPR001:Interior
temperatureX = interior
temperature ± 5 ˚C
(invalid value: 87.5 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
PR002:Exterior
temperatureX = exterior
temperature ± 5 ˚C
(invalid value: 215 ˚C)
Note: This status is
reset by the climate
control computer but
its source is the UCH.In the event of a fault, refer
to the interpretation of this
parameter (see
Section 87B).
2Solar radiationPR006:Solar radiationfrom 0 W
(no solar radiation) to
400 W
(maximum solar
radiation)
(invalid value:
765 W)In the event of a fault, see
the interpretation of this
parameter.
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$090.mif