Toyota 28800-0F010 Battery

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You should avoid creating sparks or lighting matches near the battery because it produces flammable and explosive hydrogen gas.

Caution should always be taken when disconnecting the battery, as the cable from the negative terminal should be disconnected first and connected last to prevent shorting the battery. Some vehicle systems, such as the radio, alarm system, power door locks, and power windows, require battery power at all times to enable their operation or maintain control unit memory. Before disconnecting the battery, it is important to turn off the ignition key and lighting switch to prevent damage to semiconductor components. On certain models, such as those equipped with a navigation system or rear seat entertainment system, it is necessary to wait at least 1 minute after turning off the ignition switch before disconnecting the battery to prevent damage to the navigation system. It is also advisable to remove the key from the ignition on vehicles with power door locks to prevent accidental engagement when reconnecting the battery. After the battery has been disconnected and reconnected, the Transmission Control Module (TCM) and the engine management system's PCM may need time to relearn their adaptive strategies, which may result in firmer shifting and differences in drivability and idle characteristics. The power window system may also need to be recalibrated after reconnecting the battery. Memory savers can be used to avoid some of these issues by delivering sufficient current to maintain security alarm codes and PCM memory while isolating the car battery. To facilitate PCM relearning, the engine should be started and allowed to warm up to its normal operating temperature, followed by driving the vehicle under moderate acceleration and idle conditions until normal performance returns. The vehicle should then be parked, the parking brake applied, and the shift lever put in DRIVE, allowing the engine to idle for about two minutes or until the idle stabilizes. Power window calibration can be done by turning the ignition switch to the "RUN" position and using the individual window switches to lower and raise each window while holding the switch in each position for an additional three seconds.

The next step is to disconnect the cable from the positive terminal.