Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Electrical System Diagnosis Manual, Volume 3 (1994-2001)01 · 145 electrical system diagnosis
01 · Diagnostics

Minimum pressure switch (antifros) Q9

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Air Conditioner › Minimum pressure switch (antifros) Q9
145 electrical system diagnosisMinimum pressure switch (antifros) Q9

Minimum pressure switch (antifros) Q9

Boxer T.SPARK

Illustration of minimum pressure switch with arrows indicating connection points
SPECIFICATIONS
Contact opening pressure1.7 ± 0.2 bar
Contact closing pressure3.4 ± 0.65 bar

Compressor cutoff thermal contact Q12

(for TD version only)

Illustration of compressor cutoff thermal contact with arrow indicating connection point
SPECIFICATIONS
contact opens111 ± 2 °C
contact closes106 ± 2 °C

Compressor disengagement control unit Q67

(for TD version only)

Illustration of compressor disengagement control unit with labeled pins
SPECIFICATIONS
Operating diagram:
Engine rpm (pin 6)Graph showing engine rpm increasing with time
Full load switch (pin 5)Graph showing ON/OFF switching pattern
Output voltage (pin 7)Graph showing 12V output with 8s intervals

Parts & tools for this job For 1994 Alfa Romeo 145/146

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