Disconnecting & Connecting Battery

Turn ignition off. If ignition is not turned off when battery is disconnected, fault memories can be set in some control units. If there is a possibility of mixing up battery leads (if battery positive and negative leads are the same color) and you are in doubt, follow the polarity to the battery and then mark and cover leads. Radio codes must be re-entered after battery is disconnected. Be sure to ask customer for their radio code card beforehand. Make a note of stored transmitters and restore these transmitters after reconnecting battery. Stored settings of on-board computer and clock will also be lost. All available keys must be recorded for cars with first generation infrared transmitter locking systems.

Do not disconnect battery and leads from alternator and starter motor while engine is running. Detach terminal of battery negative lead from car battery and second battery if fitted. Cover battery negative terminal(s). Detach terminal of battery negative lead from car battery and second battery if fitted. Cover battery negative terminal(s). When work is carried out on electrical system, faults may be caused in memories of some control units when battery is connected.

After connecting battery, initialize sunroof of vehicles with a 2-battery system. The 2-battery system has a starter battery circuit and a system battery circuit. A supplementary control unit monitors both battery circuits. Depending on the situation, battery circuits are connected to or isolated from supplementary control unit via an isolating relay. Two batteries are used as a storage battery. These batteries must not under any circumstances be charged with a voltage in excess of 14.8 volts. Rapid charging must not be used.