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Fault finding - Fault finding charts61A
ALP 7 Too much hot air
NOTESCarry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Check that the fuses are sound.
Use a multimeter and a 21 W test light.
Use the Wiring Diagrams Technical Note, NEW TWINGO.
Is the air flow correct?
YES
Is the air distribution correct?
YES
Using the diagnostic tool statuses and
parameters screen (cold loop sub-function),
check that the temperature signals are
consistent (no sensor drift resulting in incorrect
measurement).
For manual air conditioning systems:
–Use parameters PR002 Exterior temperature
(depending on version) and PR024 Engine
coolant temperature.
For climate control systems:
–Use parameters PR002 Exterior
temperature, PR004 Coolant temperature
and PR001 Interior temperature.
Are the temperature signals consistent?
YES
NOSee ALP3, Air flow fault
NOSee ALP2, Air distribution fault.
NOCarry out a conformity check:
–For the coolant temperature sensor,
see 13B, Diesel injection, Fault
summary table or 17B Petrol injection,
Fault summary table.
–For the exterior temperature sensor,
see 87B, Passenger compartment
connection unit, Fault summary table.
–For the interior temperature sensor,
see 62B, Climate control, Fault summary
table.
Replace any faulty components.
A
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ALP 7
CONTINUED 2
For diesel vehicles fitted with
passenger compartment heating
resistors, check that they do not
operate when the engine is hot
(temperature > 50 ˚C).
Disconnect the Passenger
compartment heating resistors
connector (component 1113) and
connect a test light between
connections 38LL and MAK.
Does the test light illuminate?
NO
Disconnect the Passenger
compartment heating resistors
connector (component 1113) and
connector a test light between each
of the connections 38LM
and MAK.
Does the test light illuminate?
NO
End of fault finding procedure.
Check the continuity and insulation to + 12 V of connection
38LL between components 1113 and 1067.
Is the connection OK?
YES NO
YESRun fault finding on the
injection computer for the
heating element resistor 1
command (see 13B, Diesel
injection, Conformity
check, Heating sub-
function ).
If the control is correct,
replace the relay
(component 1067).Fault on connection
38LL, if there is a repair
procedure, repair the
wiring (see Technical
Note 6015A, Repairing
electrical wiring,
Wiring: Precautions for
repair), otherwise
replace the wiring.
Check the continuity and insulation to + 12 V of the
2 connections 38LM between components 1113 and 1068.
YES Is the connection OK?
YES NO
Run fault finding on the
injection computer for the
heating element resistor 2
command (see 13B, Diesel
injection, Conformity
check, Heating sub-
function).
If the control is correct,
replace the relay
(component 1068).Fault on connection
38LM, if there is a repair
procedure, repair the
wiring (see Technical
Note 6015A, Repairing
electrical wiring,
Wiring: Precautions
for repair), otherwise
replace the wiring.
B
