62C-58
MR-413-X44-62C000$910_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 10 Inefficient rear screen de-icing/demisting
NOTESCarry out this conformity check after a full check using the diagnostic tool (fault
reading, especially UCH and injection faults and configuration checks).
Check that the fuses are sound.
Use a multimeter and a 21 W test light.
Use the Wiring Diagram Technical Note, New Twingo.
Special notes:
Check that the inside of the windows are not greasy as this reduces the efficiency of
the de-icing.
Note:
The de-icing control is only authorised when the engine is running to save
power. The rear screen de-icer is controlled by pressing the rear screen de-icer
button (with time delay and rear-view mirror de-icer if fitted).
Ensure that there are no water leaks in the passenger compartment which would significantly increase the
moisture and reduce the effectiveness of the demisting function (see ALP 12 if the fault is noted).
Is the fault still present?
YES NO
Check that the UCH receives the signal about the
status and operation of the engine. In the Cold Loop
screen, status ET142 Engine operating phase
should display RUNNING.
Is status ET142 RUNNING?
YES
End of fault finding procedure.
NOCarry out fault finding on the UCH
(interpretation of status ET142) and on the
multiplex network.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
62C-62
MR-413-X44-62C000$910_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 13 No lighting on the control panel in night mode
NOTESCheck fuse F42-10A of component 1016.
Using a test light, check for + 12 V between connection LPD and connection NAM of component 319.
Does the test bulb illuminate?
YES NO
Check the condition of the air conditioning control
panel bulbs.Carry out a continuity test on connection LPD
between component 319 and F42-10A of component
1016.
Are the bulbs sound? Is the test correct?
YES NO YES NO
Replace the air
conditioning control
panel.Replace the air
conditioning control
panel bulb(s).Using the test light,
check for + 12 V
between connection
LPD of component 319
and the chassis earth.Fault on connection LPD
between F42-10A of
components 1016 and
319. Repair the wiring. If
there is a repair
procedure (see
Technical Note 6015A,
Repairing electrical
wiring, Wiring:
Precautions for repair),
repair the wiring,
otherwise replace it.
Is the test correct?
NO YES
Replace the air conditioning control panelFault on connection NAM. Repair the wiring. If there is
a repair procedure (see Technical Note 6015A,
Repairing electrical wiring, W iring: Precautions
for repair), repair the wiring, otherwise replace it.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
