2008 RENAULT SCENIC air condition

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -126
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -126V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
FUNCTION: AIR CONDITIONING
Sub-function: User selection
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Sub-
functionParameter or
Status
checked Action Display and Notes Fault finding
User
selectionET029:Air conditioning
buttonDEPRESSED
RELEASED In the event of a fault,
refer to the
interpretation of status
ET029.
ET028:Heated rear screen
buttonPRESSED if the "heated rear
screen" button on the air
conditioning control panel is
pressed.
RELEASED otherwise.In the event of a fault,
refer to the
interpretation of status
ET028.
ET015:Passenger
compartment blowerACTIVE
INACTIVE
Note:
This status is only operative
for manual air conditioning
systems (and heater versions
without air conditioning).In the event of a fault,
refer to the
interpretation of status
ET015.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -127
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -127V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
FUNCTION: AIR CONDITIONING
Sub-function: Heating
*RCH = Passenger Compartment Heating Resistor
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Sub-
functionParameter or
Status
checked Action Display and Notes Fault finding
HeatingPR001:Battery voltage9 V < X < 16 V In the event of a fault,
consult the
interpretation of
parameter PR001.
PR002:External
temperature Temperature in ˚CIn the event of a fault,
consult the
interpretation of
parameter PR002.
ET017:Number of RCH*
required0, 1, 2, 3, 4 or 5In the event of a fault,
consult the
interpretation of status
ET017.
ET018:Number of RCH*
authorised by
alternator0, 1, 2, 3, 4 or 5In the event of a fault,
consult the
interpretation of
status ET018.
ET019:Number of RCH*
authorised by
injection computer0, 1, 2, 3, 4 or 5In the event of a fault,
consult the
interpretation of status
ET019.
ET015:Passenger
compartment fan ACTIVE
INACTIVE
Note:
This status is only operative
for manual air conditioning
systems (and heater versions
without air conditioning). In the event of a fault,
refer to the
interpretation of status
ET015.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -128
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -128V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
FUNCTION: AIR CONDITIONING
Sub-function: Heating (continued)
*RCH = Passenger Compartment Heating Resistor
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Sub-
functionParameter or
Status
checked Action Display and Notes Fault finding
HeatingET020:Number RCH*
activated.0, 1, 2, 3, 4 or 5In the event of a fault,
refer to the
interpretation of status
ET020.
ET021:RCH* 1 relay control ACTIVE
INACTIVE In the event of a fault,
consult the
interpretation of
status ET021.
ET022:RCH* 2 relay controlACTIVE
INACTIVE In the event of a fault,
consult the
interpretation of
status ET022.
ET023:RCH* 3 relay controlACTIVE
INACTIVEIn the event of a fault,
consult the
interpretation of
status ET023.
ET031:Fast idle speed
request for RCH*INACTIVE
Fast idle speed to prevent
battery dischargeIn the event of a fault,
consult the
interpretation of status
ET031.
ET169:EngineSTOPPEDIn the event of a fault,
refer to the
interpretation of
status ET169.
ET025:Retractable roofCLOSED
NOT CLOSED
ABSENTIn the event of a fault,
consult the
interpretation of status
ET025.
ET026:Heated rear screen
switchACTIVE
INACTIVEIn the event of a fault,
consult the status
interpretation ET026.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -129
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -129V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
FUNCTION: AIR CONDITIONING
Sub-function: Cold Loop
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Sub-
functionParameter or
Status
checked Action Display and Notes Fault finding
Cold loopET030:Air conditioning
request 2ACTIVE
INACTIVEIn the event of a fault,
consult the
interpretation of status
ET030.
ET169:EngineSTOPPEDIn the event of a fault,
refer to the
interpretation of
status ET169.
ET015:Passenger
compartment fan ACTIVE
INACTIVE
Note:
This status is only operative
for manual air conditioning
systems (and heater versions
without air conditioning). In the event of a fault,
refer to the
interpretation of status
ET015.
PR002:External
temperature Temperature in ˚CIn the event of a fault,
consult the
interpretation of
parameter PR002.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
87B
87B -139
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
87B
87B -139V9 MR-372-J84-87B000$430.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
*RCH = Passenger Compartment Heating ResistorTool status Diagnostic tool title Vdiag
ET008UCH blankV44, V48, V4C,
V4D, V4F, V50
ET010Card frequency (in MHz)V44, V48, V4C,
V4D
ET014Control power level
V44, V48, V4C,
V4D, V4F, V50 ET015Passenger compartment fan
ET016Buzzer activation request
ET017Number of RCH* required
ET018Number of RCH* authorised by alternator
ET019Number of RCH* authorised by injection computer
ET020Number RCH* activated.
ET021RCH* 1 relay control
ET022RCH* 2 relay control
ET023RCH* 3 relay control
ET025Retractable roof V48, V4C, V4D,
V4F, V50
ET026Heated rear screen switch
V44, V48, V4C,
V4D, V4F, V50 ET028Heated rear screen button
ET029Air conditioning button
ET030Air conditioning request 2
ET031Fast idle speed request for RCH*
ET032Front left-hand wheel valve signal
ET033Front right-hand wheel valve signal
ET034Rear right-hand wheel valve signal
ET035Rear left-hand wheel valve signal
ET038Service warning light on request
ET039STOP warning light on request
ET040Tyre pressure monitoring system
MR-372-J84-87B000$430.mif

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -145
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -145V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET015
PASSENGER COMPARTMENT FAN
NOTESThere must be no present or stored faults.
Apply to manual air conditioning and heating systems.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
ET015 is Inactive, the ventilation control on the air conditioning control panel is not 0.
Check the condition and connection of the heating and air conditioning system control panel connector (bent,
broken tabs, etc.).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the condition and connection of the UCH connector PE2 (tabs bent, broken, etc.).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the continuity and insulation of the following connections:
●Connection code 38LP,
●Connection code 38LQ,
between components 645 and 319.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the control panel (see 62C, Manual air conditioning).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET015/UCH_V48_ET015/ UCH_V4C_ET015/
UCH_V4D_ET015 /UCH_V4F_ET015/UCH_V50_ET015

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -147
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -147V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RCH = Passenger Compartment Heating ResistorET017
NUMBER OF RCH* REQUIRED
NOTESThere must be no present or stored faults.
The status, depending on the conditions, will be 0, 1, 2, 3, 4 or 5.
Special note:
Manual air conditioning (not automatic)
Defined by the UCH according to the engine coolant temperature, the external
temperature and electrical availability.
Climate control
Defined by the UCH according to the engine coolant temperature, the external
temperature, electrical availability, the internal temperature and the user's request.
The passenger compartment heating resistor control conditions are:
Manual air conditioning (not automatic):
ET169 Engine is Running,
ET015 Passenger compartment fan Active,
PR002 Exterior temperature < 5˚C
Engine coolant temperature < 50˚C (refer to injection computer),
Electrical availability - 60%, alternator load < 70% (refer to the Power and Switching Unit).
Climate control:
ET169 Engine is Running,
PR002 Exterior temperature < 5˚C
Engine coolant temperature < 50˚C (refer to injection computer).
Electrical availability - 60%, alternator charge < 70% (refer to the Power and Switching Unit).
Heat demand by the user (refer to the climate control computer).
Check the consistency of these statuses and parameters.
In the event of a fault, consult the interpretation of these statuses and parameters.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET017/UCH_V48_ET017/ UCH_V4C_ET017/
UCH_V4D_ET017 /UCH_V4F_ET017/UCH_V50_ET017

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -148
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -148V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RCH = Passenger Compartment Heating ResistorET018
NUMBER OF RCH* AUTHORISED BY ALTERNATOR
NOTESThere must be no present or stored faults.
Special note:
This information is usable only on vehicles fitted with passenger compartment heating
resistors.
Calculation performed by the UCH according to the alternator power available
(information supplied by the UPC).
This information allows the number of passenger compartment heating resistors to be
supplied depending on the available power.
The status, depending on the conditions, will be 0, 1, 2, 3, 4 or 5.
In the event of a fault, perform fault finding on the UPC (see 87G, Engine compartment connection unit).
The parameter PR010 (UPC) of the alternator charge should be less than 70% so that the passenger
compartment heating resistors can be authorised by the alternator.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET018/UCH_V48_ET018/ UCH_V4C_ET018/
UCH_V4D_ET018 /UCH_V4F_ET018/UCH_V50_ET018