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

62B - 5
CLIMATE CONTROL
Fault finding – Introduction62B
V3 MR-372-J84-62B000$010.mif
4. FAULT FINDING PROCEDURE
Check the battery charge and the
condition of the fuses
Print the system fault finding log
(available on CLIP and in the
Workshop Repair Manual or
Technical Note)
Connect CLIP
Dialogue
with Electronic
Control Unit?no
yes
Read the faults
Faults
presentno
yes
Deal with present faults
Deal with stored faults
The cause is
still presentnoFault
solved
yes
Conformity check
The cause is
still presentnoFault
solved
Use the fault finding
charts
The cause is
still presentnoFault
solved
Contact Techline with the
completed fault finding log
Vdiag No.: 44
See ALP 1
ACREG X84 1.1
Edition 2

62B - 6
CLIMATE CONTROL
Fault finding – Introduction62B
V3 MR-372-J84-62B000$010.mif
Vdiag No.: 44
You will always be asked for this sheet:
●When requesting technical assistance from the Techline.
●For certification requests when replacing parts that must be certified.
●To be enclosed when returning monitored parts on request. The log is needed for warranty compensation, and
enables better analysis of the removed parts.
6. SAFETY ADVICE
All work on components requires obeying safety rules to prevent physical damage or human injury:
–Make sure that the battery is properly charged to avoid damaging the computers with a low charge.
–Do not smoke.
–Use the appropriate tools.
5. FAULT FINDING LOG
WARNING!IMPORTANT
Any fault on a complex system call for thorough fault finding 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 COMPULSORY TO COMPLETE A FAULT FINDING LOG
EVERY TIME
A FAULT FINDING PROCEDURE IS PERFORMED.
ACREG X84 1.1
Edition 2

62B - 10
CLIMATE CONTROL
Fault finding – Configurations and programming62B
V3 MR-372-J84-62B000$040.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Configurations and programming
CLIMATE CONTROL COMPUTER CONFIGURATION:
The climate control computer has 2 configuration functions. These configurations need to be set after the computer
has been replaced.
These two configurations are important as they ensure air conditioning is optimised within the vehicle (better control
of automatic climate control). If they are not correctly entered, cold air and warm air production will be severely
affected (e.g. heating resistors will not be switched on to heat the passenger compartment air).
These configurations can be accessed in repair mode by the diagnostic tool and can only be entered using
the fault finding by computer menu as opposed to the fault finding by function menu.
These configurations can be read, also using the diagnostic tool in repair mode to ensure they have been correctly
set. Configurations can be read in both fault finding by computer mode and fault finding by function mode.
–The first configuration is CF044 Vehicle type; this configuration allows you to enter the body type to which the
climate control computer is fitted (J84/R84 for 4 wheel drive Mégane Scénic and Scénic, and OTHER X84 for all
other Méganes). The configuration reading is called: LC013 Vehicle type.
–The second configuration is CF117 Type of heating resistors; this configuration is used to enter the type of
passenger compartment air heating resistors fitted in the vehicle. There are three options: WITHOUT for vehicles
without 1000 W and 1800 W resistors.
Heating resistors are mainly fitted on vehicles with Diesel engines.
They are located in the ventilation - air distribution unit (left-hand side), next to the heater matrix. The label affixed
to the resistor unit (with the part number) specifies whether the resistors are 1000 or 1800 W (Note: 1800 W
resistors are mainly fitted to Mégane Scénics). This configuration reading is called: LC043 Heating resistor.
Note:
In fault finding by function mode, the diagnostic tool can also display the configuration readings of the other computers
involved in the air conditioning function. All configurations of the air conditioning function (injection computer, UCH
and Protection and Switching Unit) are listed in Section 62A Air conditioning.
MIXING
AND DISTRIBUTION MOTOR PROGRAMMING PROCEDURE (self-setting):
There is no specific programming operation for the mixing motor and the distribution motor.
However, the minimum and maximum limits of these motors have to be programmed. This operation is automatic and
is performed in the following cases:
–after replacing the mixing or distribution motor,
–after disconnecting the battery or after disconnecting the climate control computer supply fuse,
–if a fault, declared as present when the ignition was switched off, disappears the next time the ignition is switched
on.
IMPORTANT
To ensure this programming operation is performed correctly, the passenger compartment blower must be

switched off (speed set to 0).
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$040.mif

62B - 33
CLIMATE CONTROL
Fault finding – Interpretation of parameters62B
V3 MR-372-J84-62B000$080.mif
Vdiag No.: 44
PR092
BATTERY VOLTAGE
NOTESNone.
This parameter specifies the supply voltage of the climate control computer.
This parameter should indicate a voltage equal to: 10.5 < X < 14.4 V.
If the voltage is not within the specified range, disconnect connector A (12-track) of the climate control
computer to check the insulation, continuity and absence of interference resistance of the connections:
Computer connector A track 10 + accessories feed (7.5 A fuse in the Protection and
Switching Unit)
Computer connector A track 11 + before ignition feed (20 A fuse of the UCH)
Computer connector A track 6 Earth (left-hand dashboard beam)
Repair if necessary.
If the connections are correct but the fault still persists, perform fault finding on the charging circuit.
AFTER REPAIRRepeat the conformity check from the start.
ACREG X84 1.1
Edition 2

62B - 40
CLIMATE CONTROL
Fault finding – Conformity check62B
V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
MAIN SCREEN
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:
This page lists the statuses and parameters provided by the climate control computer
but which are not associated with the four sub-functions given in the conformity check
(PASSENGER COMPARTMENT VENTILATION, COLD LOOP, USER SELECTION
and HEATING sub-functions).
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1Electrical
suppliesPR092:Battery voltage10.5 < X < 14.4 VIn the event of a fault, see
the interpretation of this
parameter
ET007:+ after ignition
computer feedABSENT: Ignition off.
PRESENT: Ignition on.In the event of a fault, refer
to the interpretation of
this status.
ET002:+ 12 V side
lightsABSENT: Side lights
off.
PRESENT: Side lights
on.In the event of a fault,
consult the interpretation
of this status (see 87B,
Passenger compartment
connection unit).
PR122:Night-time
lighting level6% = minimum lighting
level.
99% = maximum
lighting level.
(side lights off: 102%)In the event of a fault, refer
to the interpretation of
parameter PR111 Lighting
dimmer voltage (see 83A,
Instrument panel).
ACREG X84 1.1
Edition 2

62B-43
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Fault Finding Chart
ALP 1 No dialogue with the computer
NOTESNone.
Try the diagnostic tool on another vehicle.
Check:
–the connection between the diagnostic tool and the diagnostic sensor (wiring in good condition),
–the connection between the vehicle's diagnostic sensor and the diagnostic socket (cable in good condition),
–the injection, engine and passenger compartment fuses.
Check for + 12 V battery on track 16, and + 12 V after ignition feed on track 1 and an earth on track 5 and
on track 4 of the diagnostic socket.
Repair if necessary.
Disconnect the connector from the climate control computer in order to check the insulation, continuity and
the absence of interference resistance of the following connections:
Climate control computer 12-track connector:
Track 11 + before ignition (see the vehicle wiring diagram)
Track 10 + accessories feed (see the vehicle wiring diagram)
Track 6 Earth
Track 7 Track 6 of the diagnostic socket (CAN H)
Track 1 Track 14 of the diagnostic socket (CAN L)
Repair if necessary (see the vehicle wiring diagram).
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2

62B - 58
CLIMATE CONTROL
Fault finding – Help62B
V3 MR-372-J84-62B000$120.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Help
MEASURING THE CONTROL VOLTAGE OF THE PASSENGER COMPARTMENT BLOWER
POWER MODULE
There are two ways to measure the control voltage of the passenger compartment blower power module:
1 / MEASURING USING
A MULTIMETER (in the voltmeter position, direct voltage measurement):
With the power module connector connected, measure across track 6 of the module and the earth.
At speed 0 the voltage measured is equal to the battery voltage (± 1 V) and at speed 8 the voltage is 5 V (± 0.5 V). The
voltage varies between 0 and 14 V for the seven intermediate speeds.
Examples of measurements taken with the voltmeter with the engine at idling speed (values given as a guide):
2 / MEASURING USING
AN OSCILLOSCOPE (Optima 5800, CLIP technique):
The blower power module is controlled by pulse width modulated control voltage (PWM).
This control voltage is always 12 V, it is the control signal (square signal) that varies:
the amplitude and frequency do not vary but instead the high status (12 V) varies in relation to the low status (5 V).
To take the measurement, connect the earth lead of the oscilloscope to the battery earth and the measuring lead of the
oscilloscope to track 6 (6-track connector) of the power module (module connector connected).
Adjust the time base on the oscilloscope to 500 µµ µ µ
s per division with a calibration of 5 V per division.
The signals obtained should be: a straight line at 14 V (± 1 V) for speed 0, and a straight line at 5 V (± 0.5 V) for speed 8.
Examples of measurements taken with the oscilloscope with the engine at idling speed (for information only):
* Passenger compartment blower PWM: passenger compartment blower pulse width modulation control voltage.
Passenger
compartment
blower speed012345678
Voltage
measurement13.77 V 12.26 V 11.79 V 11.22 V 10.43 V 9.44 V 8.08 V 6.66 V 4.96 V
PR019
Passenger
compartment
blower PWM
setting*0% 18% 23% 30% 39% 51% 66% 82% 100%
Passenger
compartment
blower speed012345678
Duration of high
status....... 450 µs400 µs350 µs300 µs250 µs200 µs150 µs.......
Duration of low
status....... 50 µs100 µs150 µs200 µs250 µs300 µs350 µs.......
PR019
Passenger
compartment
blower PWM
setting*0% 18% 23% 30% 39% 51% 66% 82% 100%
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$120.mif