| Check it makes sense only if the battery is fully or almost fully charged. Disconnect from the battery both wires (at first negative).
Negative wire must always be disconnected first and connect it last. |
1. If installed on the car stereo is equipped with a security code before to disconnect the battery make sure that have a correct combination for equipment introduction in action!
a. Check the battery level. Visually judge the brightness of the color spot indicator, built in the top of the battery (if applicable). If the spot is dark in color, make recharging the battery (see chap. Adjustment and routine maintenance). At serviceable batteries should be removed and a special cover to check the level of electrolyte in the banks - the liquid should completely hide the upper edge of the slats. If necessary, add to the relevant banks required amount of distilled water. Try not to pour more water than is really necessary, as it can lead to the displacement of the electrolyte at high engine loads. To determine the density of the electrolyte poured into the banks use a hydrometer. Remove the cover and suck in the volumetric capacity of the unit sample electrolyte. The position of the float metering chamber to determine the proportion of the electrolyte in each battery cans (follow the manufacturer's instructions of the device). The density of the electrolyte fully charged battery should be 1.270 units (the green area measuring scale). At excessively low specific weight (the red area of the scale) should be made recharging the battery (see chap. Adjustment and routine maintenance). b. Check the open circuit voltage. Prepare a digital voltmeter. | Before the measurement of the voltage necessary to remove the battery surface charge, which should be 10 seconds, turn the high beam, then turn off the lights, and wait for about two minutes. |
When the engine is stopped and disabled consumers of electricity, connect the negative lead of the voltmeter to the negative pole of the battery, then the positive - to the positive pole. At serviceable battery device must not register a reading below 12, otherwise, before proceeding to further checks should be made recharging the battery (see chap. Adjustment and routine maintenance). c. Checking voltage generated by the battery load. Adequately assess the condition of the battery without conducting this test impossible. Prepare a special-purpose meter (see. Accompanying illustration). The device allows you to assess the ability of the battery-rotation starter and generating the necessary energy at high engine loads. Connect the meter to the battery terminals and follow the manufacturer. Imitation load produced by the meter built in the coal shaft. Withstand the pressure for about 15 seconds, consider an instrument reading - the voltage must not fall below 9.6 V. | Generated by the battery voltage directly proportional to temperature. The adjustment is made on the results of a special map of states, usually enclosed in the package to the device. The minimum allowable value at 0 ?� C is about 9.1 V. |
d. Check for leakage currents. Make. With all on-board electrical consumers are switched off. If the vehicle is equipped with a lantern lighting the engine compartment, make sure of serviceability of its functioning, then unplug the lamp. Disconnect the negative wire from the battery and connect a single terminal of the lamp-sampler. A second terminal, connect to the tip of the negative wire - firing the lamp indicates the presence of leakage current, leading to the discharge of the battery. | On models equipped with the processor status monitoring of the power unit, a digital clock, electric seat adjustment with position memory unit, or other devices, which are consumers of electricity with the ignition off, it is permissible faint glow lamp probe. If there is suspicion of leakage, replace the lamp-ammeter probe - the result of measurement should not be more than 50 mA. |
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