2010 RENAULT SCENIC display

62A - 4
AIR CONDITIONING
Fault finding - Introduction62A
V4
Manual air conditioning
and
Climate control
Faults
Faults are declared either present or stored (depending on whether they appeared in a certain situation and have
disappeared since, or whether they remain but have not been diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is used after the
+ after ignition feed has been supplied (without acting on the system components).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the notes section.
If the fault is confirmed when the Notes are applied, the fault is present. Deal with the fault
If the fault is not confirmed, check:
–the electrical lines which correspond to the fault,
–the connectors for these lines (for oxidation, bent pins, etc),
–the resistance of the component detected as faulty,
–The condition of the wires (insulation melted or split, chafing, etc.).
Conformity check
The aim of the conformity check is to check statuses and parameters that do not produce a fault display on the
diagnostic tool when inconsistent. Therefore, this phase is used to:
–carry out fault finding on faults that do not have a fault display, and which may correspond to a customer complaint.
–check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section features the fault finding procedures for statuses and parameters, and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Notes about the conformity check for the climate control system
The air conditioning system conformity check is divided into four parts. The parts relate to the four air conditioning
subsystems, heater, cold loop, user selection and passenger compartment ventilation.
The statuses and parameters related to these sub-functions are listed with their respective computers.
NOTE: the manual air conditioning control panel does not control electrical components and cannot be subjected to
fault finding. Therefore, there is no conformity check in the 62C Manual air conditioning section.
Customer complaints – Fault finding charts
If the test with the diagnostic tool is OK, but the customer complaint persists, the fault should be treated by
customer complaints. Note:
The interpretation of statuses, parameters and commands is also split into several sections. Everything controlled
by the air conditioning control panel is explained in the two Air conditioning sections, 62A and 62B. By contrast,
signals from other computers are explained in the "fault finding" sections for these computers (see the conformity
check).
A synopsis of the general procedure to follow is provided on the following
page in the form of a flowchart.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$020.mif

62A - 17
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate controlAIR CONDITIONING
Fault finding - Conformity check
Subsystem: cold loop
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: ignition on (12
volts APC), engine stopped, AIR CONDITIONING
SWITCHED OFF (passenger compartment blower switched off and air conditioning
compressor not engaged).
NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant).
Fault finding procedures for the statuses, parameters and commands listed in this
check are explained in the Technical Notes relating to the computer which generates
the signal (see the Introduction section).
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Climate controlET143:Air conditioning
request 1.ACTIVE for air conditioning
request (AC button pressed
or AUTO button pressed
with "maximum cold"
request).
INACTIVE otherwise.
NOTE: This status is only
valid for climate control
systems.If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the climate control
computer to the UCH to
engage the compressor
(refer to the flowchart in
the general operation
section).
PR001:Interior
temperature.X = interior temperature
± 5 ˚C
(invalid value: 87.5 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
ET141:Passenger
compartment
blower.STOPPED
(according to test
conditions: see Notes).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative for climate
control systems.
PR012:Mixing flap
position.0% = Max. cold position
(15 ˚C)
100% = Max. warm position
(27 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
PR006:Solar radiation.0 watts (no solar radiation)
to 400 watts (maximum
solar radiation).If there is a fault, refer to the
fault finding procedure
for this parameter.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

62A - 18
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: cold loop (continued 1)
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
UCHET030:Air conditioning
request 2.INACTIVE
(engagement of the
compressor is only
authorised when the engine
is running).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the UCH to the injection
computer to engage the
compressor (refer to the
flowchart in the general
operation section).
PR002:Exterior
temperature.X = exterior temperature
± 5 ˚C
(invalid value: 215 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
ET015:Passenger
compartment
blower.INACTIVE
(according to test
conditions: see Notes).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative for manual air
conditioning (and heating
versions without air
conditioning).
ET091:Engine running.NO
NOTE: This status is
displayed by the UCH but it
is generated by the injection
computer.If there is a fault, refer to the
fault finding procedure
for this status.
(Injection Technical Note).
InjectionET079:Air conditioning
present.YES
(automatic injection
computer configuration).If the status displays NO,
refer to the fault finding
procedure for this status.
PR064:Coolant
temperature.X = engine coolant
temperature.If there is a fault, refer to the
fault finding procedure
for this parameter.
ET004:Air conditioning
authorisation.NO
(no authorisation with
engine stopped).If there is a fault, refer to the
fault finding procedure
for this status.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

62A - 19
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: cold loop (continued 2)
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Injection
(continued 1)ET088:Compressor
activation request.INACTIVE
(engagement of the
compressor is only
authorised when the engine
is running).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the injection computer to
the Protection and
Switching Unit to engage
the compressor (refer to the
flowchart in the general
operation section).
PR089:Vehicle speed.0 mph or km/h If there is a fault, refer to the
fault finding procedure
for this parameter.
PR055:Engine speed.0 rpm.If there is a fault, refer to the
fault finding procedure
for this parameter.
ET023:Fast idle request
(except EDC 16
injection).ABSENTIf there is a fault: refer to the
fault finding procedure
for this status.
NOTE: This status is not
displayed by the EDC16
injection (F9Q engine).
PR053:Engine speed
required by air
conditioning
(except S3000 and
DDCR injections).0 rpm.If there is a fault, refer to the
fault finding procedure
for this parameter.
NOTE: This parameter is
only displayed by the
EDC16 injection (F9Q
engine).
PR037:Refrigerant
pressure.1 bar < X < 35 barIf there is a fault, refer to the
fault finding procedure
for this parameter.
PR125:Power absorbed
by AC
compressor.0 W < X < 300 W
(ambient temperature
23 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

62A - 20
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: cold loop (continued 3)
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Injection
(continued 2)ET022:Low speed fan
request (except
3000 injection)INACTIVE
NOTE: This status is not
displayed by the S3000
injection (K4J, K4M, F4R
and F4RT engines).If there is a fault, refer to the
fault finding procedure
for this status.
–For more information
(Control of Fan 1 or
Fan 2 according to
vehicle speed and
refrigerant fluid
pressure), refer to the
HELP section (62B).
ET021:High speed fan
request (except
S3000 injection).INACTIVE
NOTE: This status is not
displayed by the S3000
injection (K4J, K4M, F4R
and F4RT engines).If there is a fault, refer to the
fault finding procedure
for this status.
–For more information
(Control of Fan 1 or
Fan 2 according to
vehicle speed and
refrigerant fluid
pressure), refer to the
HELP section (62B).
ET014:Fan unit 1 check
(except DDCR
injection).STOPPEDIf there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is not
displayed by the DDCR
injection (K9K engine).
ET015:Fan unit 2 check
(except DDCR
injection).STOPPEDIf there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is not
displayed by the DDCR
injection (K9K engine).
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

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 - 22
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: heating
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: ignition on (12
volts APC), engine stopped, AIR CONDITIONING
SWITCHED OFF (passenger compartment blower switched off and air conditioning
compressor not engaged).
NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant).
Fault finding procedures for the statuses, parameters and commands listed in this
check are explained in the Technical Notes relating to the computer which generates
the signal (see the Introduction section).
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Climate controlET086:Heated rear
screen: manual
mode.ACTIVE: De-icing button at
the bottom of the control
panel pressed.
INACTIVE otherwise.If there is a fault, refer to the
fault finding procedure
for this status.
ET085:Heated rear
screen: auto
mode.ACTIVE: De-icing button at
the top of the control panel
pressed ("See clear"
function).
INACTIVE otherwise.If there is a fault, refer to the
fault finding procedure
for this status.
PR121:Blown air
temperature
setpoint.0 < X < 80 ˚C.If there is a fault, refer to the
fault finding procedure
for this parameter.
PR001:Interior
temperature.X = interior temperature
± 5 ˚C
(invalid value: 87.5 ˚C).If there is a fault, refer to the
fault finding procedure
for this parameter.
PR012:Mixing flap
position.0 % = Max. cold position (15
˚C)
100 % = Max. hot position
(27 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
ET141:Passenger
compartment
blower.OFF
(according to test
conditions: see Notes).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative for climate
control systems.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

62A - 23
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: heating (continued 1)
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
UCHPR001:Battery voltage.10.5 < X < 14.4 volts.If there is a fault, refer to the
fault finding procedure
for this parameter. If the
fault is still present, carry
out a fault finding test on
the charge circuit.
PR002:Exterior
temperature.X = exterior temperature
± 5 ˚C
(invalid value: 215 ˚C).If there is a fault, refer to the
fault finding procedure
for this parameter.
ET025:Retractable roof.CLOSED or NOT CLOSED
ABSENT if the vehicle does
not have one.If there is a fault, refer to the
fault finding procedure
for this status.
ET091:Engine running:NO
NOTE: This status is
displayed via the UCH but it
is generated by the injection
computer.If there is a fault, refer to the
fault finding procedure
for this status.
(Injection Technical Note).
ET015:Passenger
compartment
blower.INACTIVE
(according to test
conditions: see Notes).If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative for manual air
conditioning (and heater
versions without air
conditioning).
ET026:Heated rear
screen switch.INACTIVE
(Inhibited with engine
stopped).If there is a fault, refer to the
fault finding procedure
for this status.
ET031:Fast idle request
for RCH.INACTIVE
(Inhibited with engine
stopped).If there is a fault, refer to the
fault finding procedure
for this status.
ET017:Number RCH
required.0, 1, 2 or 3 for Mégane
saloons and sport hatches
(1000 watt RCH).
0, 1, 2, 3, 4 or 5 for Mégane
Scénics (1800 watt RCH).
(according to heat
requirement).If there is a fault, refer to the
fault finding procedure
for this status.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif