Starting the engine in emergency situations
See subsection 1.2.6.
Examination
1. Disconnect both cables from the battery, starting with the negative terminal.
2. Check the color indicator. If the indicator is black, then charge the battery. Check the voltage, which should be 11.5-12.0 V (before disconnecting the battery, it is recommended to turn on the high beam headlights for 10 seconds, turn off the lights and other consumers).
(The material is reprinted from an online resource: ToyotaMan)
3. The battery should be checked periodically with a special load device. At room temperature, the voltage on the battery should not fall below 9.6 V.
Replacement
1. Disconnect the cables from the battery.
2. Unscrew the mounting nuts (arrows) and disconnect the mounting clamp, remove the battery.
3. When replacing the battery, make sure that the parameters of the new battery (dimensions, capacity and output current) exactly the same as the one being replaced.