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

Fault-finding

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Anti Theft device › Fault-finding
146 electrical system diagnosisFault-finding

FAULT-FINDING

When the system is activated and deactivated it automatically carries out SELF-DIAGNOSIS which reveals certain possible faults by flashing the led as shown below:

ACTIVATION:

F1 Type of led flashing Meaning Test procedure
8 Hz, duration 2,5 sec. Door/bonnet/tailgate left open or faulty switch Check that doors and bonnets are correctly shut. Activate and deactivate the system. Count the number of flashes of the led and proceed as described in the next table
Fixed light, duration 2,5 sec. Faulty volumetric sensors. Check and if necessary change the electronic control unit contained in the front ceiling light. If necessary carry out test J
16 Hz, duration 2,5 sec. Fault in the control unit electronics Change the control unit N45
No flash Fault of led B

DEACTIVATION:

F2 No. of Flashes of led Component with alarm Test to be carried out
1 Flash RH front door C
2 Flashes LH front door D
3 Flashes RH rear door E
4 Flashes LH rear door F
5 Flashes Volumetric sensors on ceiling light Check and if necessary change the electronic control unit contained in the front ceiling light. If necessary, carry out test H
6 Flashes Bonnet G
7 Flashes Tailgate H
8 Flashes Key-operated supply cut off A
9 Flashes Battery supply cut off A
10 Flashes At least 3 causes of alarm contemporaneously Repeat activation/deactivation of the system. If necessary, carry out all the above-mentioned tests.

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

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