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

Manual diagnosis (page 8 of 8)

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Anti Theft Device
145 electrical system diagnosisManual diagnosis · page 8 of 8
THE ANTI-THEFT BLOCKS THE ENGINE COMOMPLETELY (TD version) (*)TEST L
TEST PROCEDURERESULTCORRECTIVE ACTION
L1CHECK VOLTAGE
– With the ignition key at MARCIA, check for 12 V at pin B4 of control unit N45		OKCarry out step L2
NOT OKRestore the wiring between pin B4 of N45 and the ignition switch B1
L2CHECK VOLTAGE
– With the ignition key at MARCIA, and anti-theft deactivated check for 12 V at pin B3 of control unit N45		OKRestore the wiring between pin B3 of N45 and the relay for the diesel engine control devices I105 (see the section "DIESEL ENGINE CONTROL DEVICES")
NOT OKChange the control unit N45
THE ANTI-THEFT BLOCKS THE STARTER MOTOR COMPLETELY (*)TEST M
TEST PROCEDURERESULTCORRECTIVE ACTION
M1CHECK VOLTAGE
– With the key at START, check for 12V at pin B6 of control unit N45		OKCarry out step M2
NOT OKRestore the wiring between pin B6 of N45 and the ignition switch B1
M2CHECK VOLTAGE
– With the key turned to START and the anti-theft deactivated, check for 12 V at pin B5 di N45		OKCheck that the starter motor A11 is working properly with the corresponding supply cables: if necessary also check the starting consensus relay I10: see the section "STARTING AND RECHARGING"
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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