17B-25
PETROL INJECTION
Injection - air conditioning programming
L90, and K7J, and 710 – L90, and K7M, and 710
17B
I -SYSTEM OPERATION
The air conditioning system is a cold loop which opera-
tes the following components:
-a control panel,
- an injection computer,
-a compressor.
It is not adjusted, i.e. the volume of cold air is constant
from the moment the compressor begins to operate.
Pressing the « AC » button on the passenger compart-
ment control panel produces either status 0 (request for
cold air deactivated) or 1 (request for cold air activa-
ted).
This status signal is transmitted via a wire connection
to the injection computer, which then authorises the re-
quest for cold air if necessary.
II - COMPRESSOR OPERATION PROGRAMMING
During certain operating phases, the injection computer
disables the operation of the compressor.
Injection computer programming:
-If the engine speed is too low: operation of the com-
pressor is not authorised.
- If the load exerted on the engine is too great (rapid ac-
celeration, driving up a steep incline or vehicle heavily
laden): operation of the compressor is not authorised.
-If the refrigerant fluid is already pressurised in the
compressor: the computer enters safety lock-up mode
and operation of the compressor is not authorised.
If the injection computer authorises operation of the
compressor, status 1 is transmitted at the level of
power required to supply the compressor actuator.
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