Work Instructions After Disconnecting the Battery

Work Instructions After Disconnecting The Battery

Effect Of Disconnection Or Total Discharge Of The Battery On Electrical Systems In The Vehicle, Subsequent Measures

DANGER:
Risk of explosion, injury, short circuit and damage to the generator and electronic control units.
- Protective goggles must be worn at all times when working on the battery.
- Do not disconnect battery with engine running.
- Disconnect and reconnect battery with extreme caution. Risk of short circuit and explosion.
- Do not tilt battery when removing it. Risk of causticisation as a result of emerging acid.
- Do not rub the battery with a dry cloth. Risk of explosion as a result of static charge.
- All loads must be switched off beforehand.
- Never start engine without securely connected battery.
- Do not use a boost charger to start the engine.
- Whenever possible, use jump leads with overvoltage protection.
- Always disconnect both battery terminals before carrying out welding work on the vehicle.
- Only pull off or push on the wiring harness plugs of the control units or other electronic components when the ignition is switched off.

Disconnecting And Connecting The Battery

NOTE: In order to disconnect the power in the vehicle electrical system, the battery is located in the battery case under the left front seat.

Unscrewing the ground strap from the body:







1. Move the front left seat back and up as far as possible.
2. Detach the front seat trim towards the front.







3. Fold up the carpeting and unscrew the fastening nuts from the battery ground strap on the body.
4. Route or isolate the ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided.

Screwing the ground strap onto the body:







5. Position the battery ground strap on the body and screw it on tight with the fastening nut. Tightening torque 20 Nm (15 ftlb.).







6. Clip in front seat trim "1".

Control Unit Memories







Supply Voltage Fault Entry







Ready Status

NOTE: In some countries (currently USA, Canada) the Ready status must be obtained following a test drive or by using the Porsche System Tester after the battery is disconnected. If in doubt about this, contact the relevant importer.

2470 DME Control Unit

NOTE: With all DME systems, the engine must run for several minutes before the engine control unit can relearn the idle speed and mixture adaptation values.







4434 Tyre Pressure Monitoring System







4560 Steering Angle Sensor







6014 Electric Motor For Sliding Roof, Panorama Roof System







6452 Power Windows







90 25 Instrument Cluster

Clock







Test Drive After Connecting The Battery

NOTE:
- All work steps listed are carried out within the framework of the test drive, depending on the vehicle equipment.
- The fault memories of all vehicle control units should be read out again after the test drive.