Battery
- Make
- Alfa Romeo
- Model
- 145/146 Electrical System Diagnosis Manual, Volume 3
- Year
- 1994–2001
- Section
- Electrical components › Battery
BATTERY
The battery is located in the engine compartment supported by the power steering box support cross-member.
It has been designed to ensure that the engine starts in the shortest time possible. For this reason a high torque and a predefined engine rpm are required. This is ensured by the optimal sizing of the 6 elements contained inside the battery, each of which delivers a voltage of – 2 V (12 V in all).
The battery adopted does not need periodical maintenance.
It maintains the charge much longer and also contains diluted sulphuric acid; for this reason it is necessary to keep it in the upright position even when it is not installed on the car. The battery body also has small ventilation holes to minimise the formation of gas during charging. Due to the reduction in the volume of gas produced, there is no corrosion and good contact at the terminals is ensured. The advantages of this battery are:
- highly reduced water consumption due to the new type of alloy used in the manufacture of the grills and plates, for which reason it is no longer necessary to top up the battery;
- excellent starting capacity, as a result of very low self- discharging of up to 7 months thus enabling long term storage (at temperatures below 28°C).
When the vehicle is travelling the alternator recharges the battery. Whenever the charge is insufficient or the connection between the alternator and the battery is cut off, a warning light on the instrument cluster turns on to indicate a circuit failure.
If the battery appears to be flat, check the charge measuring the loadless voltage on the terminals using a Voltmeter.
If the voltage is below 12.30 V it is 50% charged; if it reaches 12.48 V it is 75% charged; and at 12.66 V it is 100% charged.
CAUTION: If the electrolyte level in one of the cells of the battery has fallen below the minimum level mark on the plastic container, carefully open the cap cover and add de-ionized water, as with ordinary batteries.
NOTE: It is highly unadvisable to recharge the battery quickly at voltages above 15.5 V. When recharging use a normal 12 V battery charger, connecting the positive cable (red) to the battery (+) terminal and the negative cable (black) to the battery (-) terminal.
If the battery of the vehicle is connected temporarily to an external battery, connect the positive terminal to the positive terminal and the negative terminal to the negative terminal.
CAUTION: - Do not connect or disconnect the battery to or from the electric system of the car when the engine is running. - Do not invert the terminal connections (even for a moment) as this would damage the alternator rectifier. - When connecting the battery charger to the battery, firstly connect the cables and then start the battery charger. - if it becomes necessary to start the engine with temporary cables and with an auxiliary battery, the voltage of the latter must not exceed 12V. - Before charging the battery the clamp should be removed from the negative terminal. - When charging make sure that the temperature of the electrolyte does not exceed 45°C. - Do not touch the positive and negative terminals at the same time with the hands. - Keep all naked flames away from the battery when recharging.
When replacing the battery follow the directions for use.
If the charge of the replacement battery is potentially higher than that of the old one, the higher voltage might cause melting of the starter motor induction coil, or damage to the pinion or crown gear.
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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