Work Instructions After Disconnecting the Battery
Work Instructions After Disconnecting The Battery
Technical values
Connecting and disconnecting battery
WARNING:
Caustic fluid.
- Danger of chemical burns
- Avoid contact with caustic fluid.
- Wear personal protective gear.
- Ensure that there is good ventilation.
- If you do come into contact, wash off immediately with plenty of warm water and contact a doctor if necessary.
Static battery charge
- Battery can explode
- Electrical discharges
- Do not rub the battery with a dry cloth.
INFORMATION:
- Switch off all loads and remove the ignition key. Do not disconnect the battery while the engine is running. Disconnect and reconnect battery with extreme caution. Do not tilt battery when removing it. Do not rub the battery with a dry cloth.
- The battery is located in the battery case under the left front seat.
Unscrewing ground strap from body:
1. Move front left seat back and up as far as possible.
2. Disengage front trim panel at the rear -Arrow A- , then unclip it by pulling it forward -Arrow B-.
3. Unclip the right carpet cover -Arrow-.
4. Fold carpeted floor forward -Arrow A- , unscrew fastening nut -1- from battery ground strap on the body and remove ground strap from the stud -Arrow B-.
5. Route or isolate ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided.
Screwing ground strap onto body:
1. Fold carpeted floor forward -Arrow A- , place battery ground strap on the body -Arrow B- and tighten with the fastening nut -1-. - Tightening torque: 20 Nm (15 ftlb.)
2. Clip in the right carpet cover -Arrow- until it engages securely.
3. Clip in the front seat trim at the front seat frame and at the side trim panel -Arrow A-.
4. Press the front seat trim down -Arrow B- until the locking hooks engage securely on the seat frame.
Effect of disconnection or total discharge of battery on electrical systems in the vehicle and the precautions to be taken
INFORMATION:
Control unit memories
Values and faults stored in the control units can be deleted if the battery is disconnected or completely discharged.
- If possible, all fault memories should be checked and, if necessary, printed out before the battery is disconnected.
Supply voltage fault entry
The entry "supply voltage" may be stored in various control units if the battery has been completely discharged.
- Delete the "supply voltage" entry from the control units in question.
Ready status
In some countries (presently the U.S.A. and Canada), after disconnecting the battery, it is necessary to reach the Ready status by a test drive and/or by using the Porsche System Tester DME control module menu). If in doubt about this, contact the relevant importer.
2470 DME control module
With all DME systems, the engine must run for several minutes before the engine control module can relearn the idle speed and mixture adaptation values.
After disconnection of the power supply, the idle speed might change or fluctuate briefly until the throttle valve adjusting unit has been readapted.
The mixture adaptation is also lost.
After the battery is connected:
With the DME, it is necessary to carry out a learning and adaptation routine as described below:
- Switch ignition on for 30 seconds without starting the engine.
- Do not actuate accelerator pedal.
This completes the adaptation of the throttle valve adjusting unit.
Tyre pressure monitoring system
When the battery is disconnected and connected, the tyre pressure is first displayed as "- - - ".
- Once the battery has been disconnected and work is complete, the vehicle must be driven for a short distance.
The actual pressures will then be displayed again.
4560 Steering angle sensor
The steering angle sensor must be re-initialised when the battery is disconnected and connected.
- Turn wheels to straight-ahead position.
- Switch ignition off and then on again twice.
- Start engine.
- From the straight-ahead position, turn steering wheel approx. 20° to the right, past the straight-ahead position.
- Drive the vehicle straight ahead for at least one second at a speed above 4 km/h (2.5 mph).
The steering angle sensor segment is recognised again in this process.
Once the sensor has been successfully initialised, the fault code that is stored in the fault memory is documented using the fault deletion counter.
The fault memory erases itself automatically.
The PSM indicator light in the instrument cluster goes out.
6014 Electric motor for sliding roof, Panorama roof system
The limit positions of the large roof are deleted from the control unit when the battery is disconnected and connected.
- Switch on ignition.
- Press rocker switch upward.
The roof opens and closes completely.
The limit positions of the large roof are now stored in the control unit again.
6452 Power windows
The limit positions of the power windows are deleted from the control unit when the battery is disconnected and connected.
Perform the following procedure for all power windows:
- Pull rocker switch and fully close window once.
- Pull rocker switch once more.
The upper end position of the window is stored.
- Press rocker switch and fully open window once.
- Press rocker switch once more.
The lower end position of the window is stored.
9025 Instrument cluster
Clock
The time is deleted when the power supply is disconnected.
The clock is set in the multi-function display.
- Press clock button on instrument cluster.
- Set the time in "Hours" with rocker switch on the wiper switch.
- Press reset switch on the wiper switch.
- Set the time in "Minutes" with rocker switch on the wiper switch.
- Press reset switch on the wiper switch.
Test drive after disconnecting battery
INFORMATION:
- Depending on the vehicle equipment fitted, all these work steps are carried out during the test drive.
- The fault memories of all vehicle control units should be read out again after the test drive.
Effects of overvoltage on electrical and electronic systems during welding work and the precautions to be taken
WARNING:
Caustic fluid.
- Danger of chemical burns
- Avoid contact with caustic fluid.
- Wear personal protective gear.
- Ensure that there is good ventilation.
- If you do come into contact, wash off immediately with plenty of warm water and contact a doctor if necessary.
Static battery charge
- Battery can explode
- Electrical discharges
- Do not rub the battery with a dry cloth.
INFORMATION: Switch off all loads and remove the ignition key. Do not disconnect the battery while the engine is running. Disconnect and reconnect battery with extreme caution. Do not tilt battery when removing it. Do not rub the battery with a dry cloth.