Note: For general information on battery maintenance and charging, refer to Chapter 1, Section 11.
1. When carrying out repairs, it is always recommended to disconnect the battery. In principle, if the battery needs to be disconnected without removing it from the vehicle, it is enough to disconnect only the wire from the negative terminal, but in order to avoid any unforeseen accidents, it is recommended to disconnect both wires and close the battery with a protective cover.
Attention: The negative wire is always disconnected first and connected last!
2. There are several systems installed on the vehicle that require a constant power supply. Disconnecting the battery inevitably leads to the erasure of the information stored in the memory of the engine management system about the optimal settings, turning off the clock, destroying the security code entered into the radio receiver, etc. Please read the following guidelines carefully before disconnecting the battery:
- a) On models equipped with a single lock, do not forget to remove the key from the ignition lock and put the key in your pocket - when the battery is connected, all doors will automatically lock;
- b) Disconnecting the battery will erase all accumulated tuning parameters from the ECM memory (except for basic settings). These parameters include: idle speed, maximum speed and fault codes of the self-diagnosis system. If necessary, read the diagnostic data before disconnecting the battery (see Section 3). After connecting, all the lost settings will be restored automatically, however, this will require some time for the control system, during which the engine may operate unstably in various modes;
- c) If the battery was disconnected while the anti-theft alarm was on, the system will remain in the same mode after the battery is connected. An audible alarm can be triggered when the battery terminals are connected;
- d) On models equipped with an on-board computer, disconnecting the battery will also delete all user data entered during the operation of the computer;
- e) The infotainment system installed in the car is equipped with a security code, before disconnecting the battery, make sure that you have the correct combination to activate the equipment. The security code can be found in the owner's manual for the infotainment system and must be kept outside the vehicle. In case of loss of the combination, seek help from the specialists of the Opel branded service station. Note: On production models from 2005, the security code is recognized by the electronic system without the intervention of the owner and its input when connecting the battery is not required;
- f) On models equipped with the ESP system, it is necessary to coordinate the steering angle sensor, for which, with the ignition on, turn the steering wheel once from right to left from lock to lock.
3. To avoid the unpleasant consequences of disconnecting the battery, you can use an external power source - detailed rules for using such devices are given in their operating instructions. As a rule, such power sources are connected to the cigarette lighter socket, after which the standard battery can be safely disconnected. The current generated by the source should be enough to power the memory of the control module, prevent blocking the radio and keep the clock working.
Attention: Some of these devices can supply enough current to the system for normal operation of other power consumers. Before servicing electrical components, make sure that the corresponding consumer is completely de-energized!
4. After connecting the battery, it is necessary to coordinate the electric drives of the windows and the top hatch (with appropriate equipment) (see chapter «Controls and methods of operation»).
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