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

Self-diagnosis (page 2 of 2)

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Automatic Air Conditioner
145 electrical system diagnosisSelf-diagnosis · page 2 of 2
PRELIMINARY CHECKS ON THE AUTOMATIC AIR CONDITIONING SYSTEMTEST A
TEST PROCEDURERESULTCORRECTIVE ACTION
A1CHECK FUSE
– Check the intactness of fuses F13 and F17 of fusebox G1, and wander fuses Q65 and G255 (only for fusebox B)		OKCarry out step A2
NOT OKReplace any faulty fuse/s
A2CHECK RELAY
– Check the intactness of relay I78 (only for fusebox B)		OKCarry out step A3
NOT OKReplace the faulty relay
A3CHECK CONTINUITY
– Check continuity of the cable between the control unit Q21 (pin 25) and connector G, fusebox G1		OKCarry out step A4
NOT OKRestore the continuity of the wiring
A4CHECK CONTINUITY
– Check continuity of the cable between the control unit Q21 (pin 3 and 13) and earth G148b		OKCONNECT TO THE DIAGNOSIS SOCKET T10 AND CONTINUE OPERATIONS WITH THE ALFA TESTER
NOT OKRestore continuity of the wiring

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

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