Manual diagnosis (page 2 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 2 of 9
| PRELIMINARY CONTROL UNIT CHECK (N45) | TEST A | ||
|---|---|---|---|
| F1 | TEST PROCEDURE | RESULT | CORRECTIVE ACTION |
| A1 CHECK FUSES | OK ▶ Carry out step A2 | – Check the intactness of fuses F1 and F16 of fusebox G1 | |
| A2 | – Check for 12 V at pin A3 of control unit N45 | OK ▶ Carry out step A3 | Change fuses F1 and/or F16 |
| A3 | – With the ignition key turned, check for 12 V at pin B12 of control unit N45 | OK ▶ Carry out step A4 | Restore the wiring between pin A3 of N45 and the branch terminal board |
| A4 | – Check that pin A9 of control unit N45 is earthed (0 V) | OK ▶ Carry out step A5 | Restore the wiring between pin B12 of N45 and the fusebox G1 |
| A5 | – Check the continuity of the connection between pin A2 of N45 and pin 2 of receiver N67 | OK ▶ Carry out step A6 | Restore the wiring between pin A9 of N45 and earth G63b |
| A6 | – Check the continuity of the cables: | OK ▶ CONNECT TO THE DIAGNOSIS SOCKET T7 AND CONTINUE OPERATIONS WITH THE ALFA TESTER, OR FOLLOW THE INSTRUCTIONS OF THE LED THAT SIGNALS THE RESULTS OF SYSTEM SELF-DIAGNOSIS | - between pin A6 of N45 and pin 3 of diagnosis connector T7 |
| – between pin 2 of T7 and earth G63b | OK ▶ Restore the wiring between T7, N45 and G63b | ||
Parts & tools for this job For 1994 Alfa Romeo 145/146
- TOOLDigital multimeterSearch: automotive digital multimeter
- PARTAssorted fuse kitSearch: car fuse assortment kit
- TOOLWire crimper and connector kitSearch: wire crimper connector kit
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