Precautions for Removing Battery Terminal: Notes

WARNING:

Battery posts, terminals and related accessories contain lead and lead compounds. WASH HANDS AFTER HANDLING .
Certain components of this vehicle, such as air bag modules and seat belt pre-tensioners, may contain perchlorate materials. Before deployment and/or disposal of these components, review and comply with all applicable Federal, state and local regulations .

CAUTION: If 12V battery is disconnected, the control timer which operates the engine forcibly will be reset. If the engine does not start for prolonged period after the reset, the fuel injection system may be clogged. To avoid this, press the battery charging switch to start the engine. Note that the battery charging switch may not be turned on if the drive battery is almost fully charged. In that case, wait until the drive battery is partially discharged.

With the adoption of Auto ACC function, ACC power is automatically supplied by operating the Keyless operation key or remote keyless entry or by opening/closing the driver side door. In addition, ACC power is supplied even after the electric motor switch is turned to the OFF position, i.e. ACC power is supplied for a certain fixed time.
When disconnecting the 12V battery terminal, turn off the ACC power before disconnecting the 12V battery terminal, observing "How to disconnect 12V battery terminal" described below.

Courtesy of MITSUBISHI

NOTE: Some ECUs operate for a certain fixed time even after electric motor switch is turned OFF and ignition power supply is stopped. If the battery terminal is disconnected before ECU stops, accidental DTC detection or ECU data damage may occur.
Be sure to connect the battery before turning ON the electric motor switch.
NOTE: If the electric motor switch is turned ON with the terminals of the battery disconnected, then DTC may be detected.
After installing the 12V battery, always check the DTC of all ECUs and erase DTC.
NOTE: The removal of 12V battery may cause a DTC detection error.