Toyota 28800-AA010 Battery

Disconnect the negative battery cable, then the positive cable from the battery. If the radio in your vehicle is equipped with an anti-theft system, make sure you have the correct activation code before disconnecting the battery. Check the battery state of charge. Visually inspect the indicator eye on the top of the battery; if the indicator eye is black in color charge the battery. Next perform an open voltage circuit test using a digital voltmeter. The battery's surface charge must be removed before accurate voltage measurements can be made. Turn On the high beams for ten seconds, then turn them off, let the vehicle stand for two minutes. Perform a battery load test. An accurate check of the battery condition can only be performed with a load tester. This test evaluates the ability of the battery to operate the starter and other accessories during periods of heavy amperage draw. Install a special battery load testing tool onto the terminals. Load test the battery according to the manufacturer's instructions for the particular tool. Disconnect the negative battery cable, then the positive cable from the battery. Always disconnect the negative cable first and hook it up last or the battery may be shorted by the tool being used to loosen the cable clamps. Remove the battery hold-down clamp. Lift out the battery. Be careful - it's heavy. While the battery is out, inspect the battery tray for corrosion. If corrosion exists on the battery tray, detach the bolts and remove the tray from the engine compartment. Clean the deposits from the metal to prevent the battery tray from further corrosion. If you are replacing the battery, make sure you get one that's identical, with the same dimensions, amperage rating, cold cranking rating, etc. Installation is the reverse of removal.

During an external inspection, check for:Torn or damaged rubber protectors.Corroded or loose connections.Cracks in the case or cover.Loose hold-down clamps.Battery condition indicator (if present).