FUNCTIONAL DESCRIPTION (T.SPARK version)
- Make
- Alfa Romeo
- Model
- 145/146 Electrical System Diagnosis Manual, Volume 3
- Year
- 1994–2001
- Section
- Starting and Charging › FUNCTIONAL DESCRIPTION (T.SPARK version)
FUNCTIONAL DESCRIPTION (T.SPARK version)
When the key in the ignitions switch B1 is turned to the "START" position, it energises the winding of the electromagnet (pin 50) of the starter motor A11 and supplies (pin 30) the starter motor itself with current leading directly from the battery A1 thereby cranking the engine.
When the engine is running, the direct current generated by the alternator A3 (pin B+) is sent to recharge the battery A1 via the starter motor A11. All the lines for supplying the various electric systems of the car branch from the terminal box G56 connected to the + terminal of the battery A1 (see "Supply"), in particular the supply for the ignition switch B1 via fuse G384 (50A)
When the alternator is not turning and therefore not charging the battery, an earth signal is sent from pin D+ to the instrument cluster C10 to turn on the corresponding warning light; once the engine has been started this signal becomes 12 V and the warning light goes off.
COMPONENTS AND CONNECTORS (T.SPARK version)
| Battery | A1 | Alternator, with built-in voltage regulator | A3 | |
|---|---|---|---|---|
| 16RED • A11 | 1GRY-YEL • G308 | D+ | ||
| 16RED • G56 | 16BLK • G318 | 10BLK • G53b | B+ | |
| 16RED • A11 | 16RED • A11 | |||
| 16RED • G56 | 16BLK • G318 | 10BLK • G53b | ||
| Starter motor | A11 | Ignition switch | B1 B | |
| 16RED • A3 | 2.5RED • G56 | B | ||
| 16RED • A1 | 2.5RED-BLK • G5 | A | ||
| 2.5RSS-NRO • G5 | 2.5RSS-NRO • G5 | |||
| 30 | 50 | |||
Parts & tools for this job For 1994 Alfa Romeo 145/146
- TOOLBattery testerSearch: car battery tester
- TOOLDigital multimeterSearch: automotive digital multimeter
- TOOLBattery terminal cleanerSearch: battery terminal cleaner
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