Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Electrical System Diagnosis Manual, Volume 3 (1994-2001)02 · 146 electrical system diagnosis
02 · Diagnostics

Manual diagnosis (page 6 of 9)

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Anti Theft device
146 electrical system diagnosisManual diagnosis · page 6 of 9
CHECK TAILGATE CONTACT (H24)TEST H
TEST PROCEDURERESULTCORRECTIVE ACTION
H1CHECK LUGGAGE COMPARTMENT LIGHT
– Check that the light turns on when the tailgate is opened F5		OKCarry out step H2
NOT OKFollow the instructions given in FAULT-FINDING in the "CEILING LIGHTS" section
H2CHECK EARTH
– With the tailgate open, check for 0 V (earth at pin B17 of anti-theft control unit N45		OKChange the control unit N45
NOT OKRestore the wiring between contact H24 and pin B17 of control unit N45
THE ANTI-THEFT SYSTEM DOES NOT FLASH THE BLINKERSTEST I
TEST PROCEDURERESULTCORRECTIVE ACTION
I1CHECK OPERATION OF BLINKERS
– Check that the hazard warning lights (blinkers) are working properly when activated manually		OKCarry out step I2
NOT OKFollow the instructions in FAULT-FINDING of the "DIRECTION INDICATORS AND HAZARD WARNING LIGHTS" section
I2CHECK VOLTAGE
– Check for 12V at pin B7 of N45		OKCarry out step I3
NOT OKRestore the wiring between N45 and G1
I3CHECK CONTINUITY
– Check continuity between:
- pin B1 of control unit N45 and the right rear light E19
- pin B2 of N45 and the left rear light E20		OKChange the control unit N45
NOT OKRestore any faulty wiring

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

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