Seat Leon >> Disconnecting and reconnecting battery

Caution

Observe the following instructions and precautions on safety when working on pyrotechnic components:

  • When working on pyrotechnical components (such as the airbag, belt tensioner), the battery must be disconnected in a different manner as described below if the ignition is on - Safety note: safety measures for work with pyrotechnical components .

Special tools and workshop equipment required

  • Torque wrenches - V.A.G 1783-

Starter, current supply, CCS

Disconnecting

Note

  • By disconnecting the earth strap (power interrupted), safety is guaranteed while working on the electrical system.
  • The battery positive only needs to be disconnected if the battery is to be removed.
  • The earth strap must not be disconnected from the bodywork.

Removing

  • Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

  • Remove ignition key, if fitted.

Vehicles with access and start authorisation system

  • Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

  • Open the cover of the battery cover.
  • Open cover -1- over negative battery terminal.
  • Slacken off nut -3- several turns and disconnect battery clamp -2- of earth cable from battery terminal.

Vehicles with start / stop system

Starter, current supply, CCS

  • Disconnect the connector -1- on the control unit for monitoring the battery - J367- -2-.
  • Slacken the fixing nut -4- and disconnect the control unit for monitoring the battery - J367- -2- from the negative terminal -3-.

Starter, current supply, CCS

Connecting

Installation is carried out in the reverse sequence; note the following:

  • Activate the automatic open / close function of electric window lifters .
  • Connecting vehicle diagnosis tester .
  • Call up and delete the event memory .

Note After re-connecting the power supply, the ESP warning lamp may not go out until the vehicle has been driven a few metres.

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