62B-48
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 4 Inefficient windscreen demisting
NOTESOnly consult this customer complaint after a complete check using the diagnostic
tool.
Special notes:
Check that the inside of the windows are not greasy, as this lowers the efficiency
of the demister.
Check that the air extraction vents are not blocked.
Repair if necessary.
Is the fault still present?
YES
Ensure that there are no water leaks into the passenger
compartment which would significantly increase the humidity
and reduce the effectiveness of the demisting.
Repair if necessary (see ALP 12).
Is the fault still present?
YES
Check that the compressor is operating correctly by running command: AC008 Compressor command
(Protection and Switching Unit command mode) or by operating the air conditioning (press AC button).
Repair if necessary (see ALP 8 No cold air, in section 62A).
Check that the condensation drain ring (water from the evaporator) is not obstructed (underneath the body).
Repair if necessary.
Is it an air distribution fault?
NO
NO
NO
YESEnd of fault finding procedure.
End of fault finding procedure.
See ALP 2.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2
62B-54
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 13 No control panel lighting
NOTESOnly refer to this customer complaint after a full check of the multiplex network
and the air conditioning with the fault finding tool.
Special notes:
With the ignition on, the control panel screen is permanently on but the panel buttons
only light up when the sidelights are switched on.
Note:
If the external temperature sensor is faulty, the climate control computer is
switched on 5 seconds after the ignition is switched on (this allows a fault to be
identified as fault finding cannot be performed on the external temperature sensor
by the UCH).
Is the fault common to other components (instrument panel,
multifunction display, electric window buttons, etc.)?
YES
Switch on the ignition and switch on the side lights to check
there is a 12 V supply on track 6 of the brown 12-track
connector (PPH2) of the Protection and Switching Unit.
Is there a 12 V supply?
YES
Check the connection and the condition of the connectors at the air conditioning control panel
output.
Repair if necessary.
Check the insulation, continuity and absence of interference resistance on the following
connection:
Air conditioning computer 12-track connector
track 9
Repair if necessary.Protection and Switching Unit brown 12-track
(PPH2) connector
track 6
NO
NOPerform fault finding on the
protection and switching unit.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2
