Attention.
- The battery contains toxic substances. Be careful when handling the battery.
- Because battery electrolyte is highly corrosive, be careful not to get it on clothing or vehicle surfaces.
- If electrolyte comes into contact with skin or clothing, immediately wash it off with plenty of running water. If the electrolyte gets into the eyes, rinse them with running water for 15 minutes, then seek medical attention.
1. Using an ariometer, measure the density of the electrolyte. If the measured value is less than 1.22-1.29 at 20°C, recharge the battery.
2. Measure the positive battery voltage. If the value obtained is less than 12.4V, fast charge for 30 minutes and check the voltage again. If after that the voltage is less than 12.4 V, replace the battery with a new one.
3. Using a battery tester, apply a working load and check the voltage after 15 seconds. If during this time the battery voltage drops too low, replace the battery with a new one.
Note:
Battery Working Load:
- 55D23L (48): 180 A
- 75D23L (52): 195 A
4. Check parasitic currents:
- Make sure the ignition is off (the key must be removed), and all doors are closed.
- Disconnect the negative battery terminal.
Attention. Turning on workloads while measuring parasitic currents can damage the tester.
Note:
- If the battery is not disturbed for 10 minutes or more (but not longer than 30 minutes), the tester will show a high value (approx. 300 mA).
- If, after connecting the tester, the ignition or any electrical consumer is turned on, the battery must be left alone for 10 minutes or more (but not longer than 30 minutes), starting from now.
- In cars with an immobilizer, the system periodically switches on the synchronization of the flashing indicator of the security system. In this regard, a current of 65 mA is supplied (0.1 second) when the security indicator lights up, and 40 mA (2 seconds) when the security indicator goes off. A meter that displays an average value will display approximately 55 mA.
Connect the tester between the negative battery terminal and the negative cable, and leave the battery alone for 10 minutes or more (but not longer than 30 minutes). Then measure the parasitic currents. If the measured value is not correct (40-65 mA), repeat the measurement of parasitic currents after removing the fuses one by one from the fuse boxes. Check and repair the wiring and fuse connectors of subsystems for which increased currents are detected.
Note: If the battery is left idle for more than 30 minutes, the parasitic currents will be 25-45mA.