clutch RENAULT SCENIC 2010 J95 / 3.G Air Conditioning Workshop Manual

62A - 21
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: cold loop (continued 4)
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Protection and
Switching UnitET007:High speed fan
control.INACTIVE
(On Mégane saloons and
sport hatches this status is
always
ACTIVE: ignore it
).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative on Mégane
Scénics (2 engine cooling
fans and Fan unit 2 relay
outside the UPC).
AC008:Compressor
control.Command for testing the
operation of the air
conditioning compressor
clutch.If there is a fault, consult the
fault finding procedure
for this command.
NOTE: The UPC cannot
test the compressor control
circuit; this command is the
only way to test its
operation.
AC009:Low speed fan
unit.Command for testing the
low speed operation of the
engine cooling fan unit
(Fan unit 1).If there is a fault, consult the
fault finding procedure
for this command.
NOTE: The UPC cannot
test the control circuit for
Fan unit 1; this command is
the only way to test its
operation.
AC010:High speed fan
unitCommand for testing the
high speed operation of
the engine cooling fan unit
(Fan unit 2).If there is a fault, consult the
fault finding procedure
for this command.
NOTE: On Mégane saloons
and sport hatches the UPC
cannot test the control
circuit for Fan unit 2; this
command is the only way to
test its operation.
On Mégane Scénics, the
Fan unit 2 control relay is
outside the UPC and its
control line is tested by
(DF002 High speed fan
control relay circuit).
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

62A - 34
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: cold loop (continued 4)
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Protection and
Switching UnitET007:High speed fan
control.INACTIVE
(On Mégane saloons and
sport hatches this status is
always ACTIVE: ignore it
).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative on Mégane
Scénics (2 engine cooling
fans and Fan unit 2 relay
outside the UPC).
AC008:Compressor
control.Command for testing the
operation of the air
conditioning compressor
clutch.If there is a fault, consult the
fault finding procedure
for this command.
NOTE: The UPC cannot
test the compressor control
circuit, this command is the
only way to test its
operation.
AC009:Low speed fan
unit.Command for testing the
low speed operation of the
engine cooling fan unit
(Fan 1).If there is a fault, consult the
fault finding procedure
for this command.
NOTE: The UPC cannot
test the control circuit for
Fan unit 1; this command is
the only way to test its
operation.
AC010:High speed fan
unitCommand for testing the
high speed operation of
the engine cooling fan unit
(Fan 2).If there is a fault, consult the
fault finding procedure
for this command.
NOTE: On Mégane saloons
and sport hatches the UPC
cannot test the control
circuit for Fan unit 2; this
command is the only way to
test its operation.
On Mégane Scénics, the
Fan unit 2 control relay is
outside the UPC and its
control line is tested by
(DF002 High speed fan
control relay circuit).
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-52V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 8
CONTINUED 3
Check the condition of the air conditioning compressor
belt and its tension.
Is the tension correct?
YES
With the engine stopped, use the diagnostic tool to run
command AC008 COMPRESSOR CONTROL (Protection
and Switching Unit command mode menu).
Does the compressor clutch jam?
YES
With the engine warm and passenger
compartment ventilation operating, vary
the position of the mixing flap from the
maximum hot position to the maximum
cold position and check subjectively that
there is a difference in temperature.
Can you feel the difference in
temperature?
YES
NOReplace the belt
(refer to repair methods).
NOUse the fault finding procedure for
command AC008 COMPRESSOR
CONTROL found in the Protection
and Switching Unit Technical Note.
NOFor climate control systems:
Carry out a conformity check on the mixing motor
(PR012 MIXING MOTOR). If the conformity check
does not reveal any faults, look for a mechanical
fault with the mixing flap (condition of the motor's
toothed sector, flap jammed inside the unit, etc.).
For manual air conditioning systems:
Check the condition and routing of the mixing flap
control cable. Eliminate any stresses on it: kinks,
cable restricted by plastic clips, etc.
Replace it if necessary. Unclip the cable from the
side of the unit and check the stiffness of movement
of each component: control button and flap control
on the air distribution unit.
Check that there is no mechanical fault with the
mixing flap (flap jammed inside the unit, etc.).
Carry out any necessary repairs.
Is the fault still present?
YES NO
End of fault finding
procedure.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-54V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 9 Too much cold air
NOTESOnly refer to this customer complaint after a full check with the diagnostic tool (fault
reading and configuration checks).
With the engine running at idle speed and air conditioning switched off ("AC" button not
pressed and no "AUTO" mode), check that the air conditioning compressor clutch is not
engaged.
Is the air conditioning compressor clutch engaged?
YES
With the engine stopped, use the diagnostic tool to run command AC008
COMPRESSOR CONTROL (Protection and Switching Unit command mode menu) to
check the correct operation of the compressor clutch electrical control.
During the command, track A of the compressor clutch must be supplied with + 12 volts.
If the + 12 volts feed is still present after the command has terminated: refer to the
interpretation of this command (check the continuity and insulation against + 12 volts
of the electrical connection between the UPC and the compressor clutch).
If there are no faults on the compressor command line but the clutch remains engaged:
check that the air conditioning compressor clutch is not seized (mechanical fault).
Replace the air conditioning compressor if necessary.
Is the fault still present?
YES
NO
NO
End of fault finding
procedure.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2