12 00 ... Instructions For Disconnecting And Connecting Battery: Notes
Observe safety instructions for handling vehicle battery. Refer to 61 00... SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY .
Before Disconnecting Battery:
Switch off ignition.
NOTE:
If the ignition is not turned off when the battery is disconnected, fault memories may be set in some control units.
IMPORTANT:
- There is a danger of mixing up battery leads: If the battery positive and negative leads are the same color and you are in doubt, follow the polarity to the battery, then mark and cover the leads.
- On vehicles with radio code: After disconnecting the battery, the radio code must be re-entered. Therefore obtain the radio code card from the customer beforehand. Note stored stations and restore them after connecting the battery.
- Stored settings of the on-board computer and clock will also be lost.
- All available central keys must be recoded for cars with first generation infrared transmitter locking systems.
General Notes On Disconnecting Battery:
- Do not disconnect battery leads and leads from alternator and starter motor while engine is running.
- Cars with IBS on battery negative terminal:
Do not under any circumstances pull/lever off pole shoes by force.
Do not under any circumstances release socket-head cap screw of IBS.
- Detach terminal of battery negative lead from car battery and second battery if fitted. Cover battery negative terminal(s) and secure.
- When work is carried out on the electrical system, faults may be caused in the fault memories of some control units when the battery is connected.
- When fitting terminal for battery negative lead: Tightening torque, refer to 61 21 1AZ ENGINE ELECTRICAL SYSTEM TIGHTENING TORQUES .
After Connecting Battery:
IMPORTANT:
After a power supply interruption some equipment is disabled and must be reactivated. Likewise, individual settings are lost and must be activated.
Example:
- Activate sliding sunroof, refer to 54 0. NOTES ON STEEL AND GLASS SLIDE/TILT SUNROOFS (INITIALIZATION/NORMALIZATION/LEARNING OF CHARACTERISTIC CURVE) .
- Vehicles with AFS only: activate steering angle.
- If necessary, activate power windows.
- If necessary, activate mirror with compass.