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 4 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 4 of 8
CHECK LH FRONT DOOR CONTACT (P11)TEST D
TEST PROCEDURERESULTCORRECTIVE ACTION
D1CHECK DOOR LOCKING DEVICE
– Check that the door locking device is working properly, with regard to the LH front door		OKCarry out step D2
NOT OKFollow the instructions given in FAULT-FINDING of the "DOOR LOCKING DEVICE" section
D2CHECK EARTH
– With the door open, check for 0 V (earth at pin B8 of the anti-theft control unit N45		OKChange the control unit N45
NOT OKRestore the wiring between pin B8 of control unit N45 and the door lock P11
CHECK BONNET CONTACT (H44)TEST E
TEST PROCEDURERESULTCORRECTIVE ACTION
E1CHECK CONTACT
– Check the correct fastening of contact H44 and of the striker on the bonnet		OKCarry out step E2
NOT OKFix or change contact H44 or the corresponding striker
E2CHECK EARTH
– With the bonnet closed (switch pressed), check for an earth on both terminals of switch H44		OKCarry out step E3
NOT OKRestore the wiring between H44 and earth G53a
E3CHECK EARTH
– With the bonnet closed, check for 0 V (earth) at pin B18 of anti-theft control unit N45; opening the bonnet (releasing the switch) the signal becomes appr. 12 V		OKChange the control unit N45
NOT OKRestore the wiring between switch H44 and pin B18 of control unit N45

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

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