climate control RENAULT SCENIC 2008 J84 / 2.G Passenger Comparment Connection Unit Workshop Manual

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 -153V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET026
HEATED REAR SCREEN CONTROL
NOTESThere must be no present or stored faults.
Special note:
Operation of the heated rear screen requires the engine status to be Running.
ET026 Inactive despite a rear de-icing request by the user.
Air conditioning
Manual
Climate control
Verify that status ET142 Engine operating phase is Running; otherwise, carry out
fault finding on the injection system.
Check that status ET028 Heated rear screen switch is PRESSED, otherwise refer
to the interpretation of this status.
If the fault is still present, contact your Techline.
Verify that status ET142 Engine operating phase is Running; otherwise, carry out
fault finding on the injection system.
If the fault is still present, carry out a fault finding procedure on the air conditioning
computer.
If the fault is still present, contact your Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET026/UCH_V48_ET026/ UCH_V4C_ET026/
UCH_V4D_ET026 /UCH_V4F_ET026/UCH_V50_ET026

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -156V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET030
AIR CONDITIONING REQUEST 2
NOTESThere must be no present or stored faults.
The engine must be running.
Special note:
This is the request for air conditioning sent by the UCH to the injection computer. This
request may reach the UCH in two ways:
–In the case of a vehicle fitted with manual air conditioning, by pressing on the air
conditioning button.
–In the case of a vehicle fitted with climate control, by request from the user or the
climate control computer in automatic mode.
ET030 Inactive despite a climate control request.
Air conditioning
Manual

Air conditioning
climate control
Verify that status ET169 Engine is Running. If status ET169 is not running, run fault
finding on the injection.
Check that status ET029 Air conditioning button is PRESSED by pressing the
button. If status ET029 is RELEASED carry out fault finding on this status.
Verify that status ET015 Passenger compartment ventilation is ACTIVE. If status
ET015 is INACTIVE carry out fault finding on this status.
If the fault is still present, contact the Techline.
Carry out fault finding on the climate control computer (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_ET030/UCH_V48_ET030/ UCH_V4C_ET030/
UCH_V4D_ET030 /UCH_V4F_ET030/UCH_V50_ET030

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87B
87B - 264
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87B
87B - 264V9 MR-372-J84-87B000$774.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
AC019
HEATED REAR SCREEN INDICATOR LIGHT
Except with climate control
NOTESNo faults should be present or stored.
This command is for testing operation of the heated rear screen indicator light.
Apply after ignition feed.
The command lasts 7 seconds.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
The heated rear screen indicator light does not light up when the command is activated.
Check the condition and connection of the heater control panel connector.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check for earth on connection NAM of component 319.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
With the command running, check for + 12 V feed on connection 15A of component 316.
If OK, replace the control panel.
Check the condition and connection of connector PE2 on the UCH
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the insulation and continuity of the following connection:
●Connection code 15A between components 645 and 319.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the fault is still present, contact Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.