Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 155 Factory Service Manual (1992-1998)36 · Electrical 21B – Anti-theft device
36 · Electrical

Test k

Make
Alfa Romeo
Model
155 Factory Service Manual
Year
1992–1998
Section
Check led › Test k
Electrical 21B – Anti-theft deviceTest k
TEST PROCEDURE RESULT CORRECTIVE ACTION
J1 CHECK LED
- Disconnect the led D31 and check its operation (applying for example, 5 V to the terminals)		 OK Carry out step J2
NOT OK Replace led D31
J2 CHECK CONTINUITY
- Check for continuity between:
- one of the terminals of the led D31 and earth G53b
- the other terminal of the led D31 and pin A1 of control unit N45		 OK Replace the control unit N45
NOT OK Restore wiring between:
- D31 and earth G53b (BLK)
- D31 and pin A1 of N45 across pin A8 of connector G24 (BLK)

TEST K

THE EMERGENCY KEY DOES NOT WORK

TEST K

TEST PROCEDURE RESULT CORRECTIVE ACTION
K1 CHECK SWITCH
- Check for correct operation of switch B97
- in the OFF position the contact between pins A1 and B is closed
- in the ON position the contact between pins A2 and B is closed		 OK Carry out step K2
NOT OK Replace switch B97
K2 CHECK CONTINUITY
- Check for continuity between:
- pin A1 of B97 and pin A4 of N45
- pin A2 of B97 and pin A7 of N45
- pin B of B97 and pin B13 of N45		 OK Replace the control unit N45
NOT OK Restore wiring between:
- pin A1 of B97 and pin A4 of N45, across pin B1 of G241 (BLK)
- pin A2 of B97 and pin A7 of N45, across pin B2 of G241 (BLK)
- pin B of B97 and pin B13 of N45, across pin B4 of G241 (BLK)

Parts & tools for this job For 1992 Alfa Romeo 155

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