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 8 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 8 of 9
THE ANTI-THEFT BLOCKS THE ENGINE COMPLETELY (Boxer 1.7 16v) (*)TEST L
TEST PROCEDURERESULTCORRECTIVE ACTION
L1CHECK EARTH SIGNAL
– With the ignition key at MARCIA and the anti-theft deactivated, check for 0 V at pin A10 of control unit N45; if the anti-theft "alarms" the signal becomes "high" (appr. 12 V)		OKRestore the wiring between pin A10 of N45 and the Motronic system (pin 47 of control unit S11) (For further details see the section "Motronic M2.10.1")
NOT OKChange the control unit N45
THE ANTI-THEFT BLOCKS THE ENGINE COMPLETELY (Boxer 1.3 and 1.6) (*)TEST M
TEST PROCEDURERESULTCORRECTIVE ACTION
M1CHECK VOLTAGE
– With the ignition key at MARCIA and the anti-theft deactivated, check for 12 V at pin B3 of control unit N45		OKCarry out step M2
NOT OKRestore the wiring between pin B3 of N45 and the injection system (pin 86 of relay I29 for Boxer 1.3 - pin 20 of control unit S11 for Boxer 1.6)
M2CHECK VOLTAGE
– With the ignition key at MARCIA and the anti-theft deactivated, check for 12 V at pin B4 of control unit N45		OKRestore the wiring between pin B4 of N45 and the injection system (pin 1 of connector G133a for Boxer 1.3 - pin 85 of relay S12a for Boxer 1.6) (For further details see the corresponding sections "IAW" and "Motronic MP3.1")
NOT OKChange the control unit N45

(*) Warning: this function is active only for versions without ALFA ROMEO CODE.

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

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