Replacing Vehicle Electrical System Battery

NOTIFICATION 

Voltage drop 

• Risk of irreparable damage to control unit 
• Risk of damage to control unit 
• Fault entries in the control unit 
• Coding in the control unit is aborted 
• Malfunctions in control unit, even during programming 
  1. → Prior to disconnecting the control unit, switch off ignition and remove ignition key.
  2. → Ensure that the power supply is not interrupted during programming.
  3. → Connect a battery charger with a current rating of at least 90 A to the vehicle battery.

Information 

The PIWIS Tester  instructions take precedence since the description may be different with later Tester releases.

The procedure described here has been structured in general terms. Different text or additional information may appear on the PIWIS Tester. 

Information 

The AGM (A  bsorbent G  lass M  at) battery is a maintenance-free, sealed  battery.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Serial number and part number on battery

• The AGM battery must not be opened. If the AGM battery is opened, it must be replaced. 
• A serial number -A- and - part number -B- is - shown on the AGM battery. 
• The serial number, part number, battery capacity and battery manufacturer must be written to the gateway control unit following replacement of the AGM battery. 

1. Connect the Tester to the vehicle and start it. Switch on ignition.
2. Select the vehicle type if required.
3. Select the Gateway  control unit in the overview.  Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.
4. Maintenance/repairs  must now be selected.

   5Replace battery  must be selected. Press F12 to continue.

   Follow the instructions on the Tester.

5. Enter the battery capacity  .
6. Enter the type of battery  (e.g. AGM).
7. Enter the serial number  (incl. spaces) of the battery.
8. Enter the part number  (excl. index) of the battery.
9. Press F8 to write values.
10. Read out the fault memory  and erase it if necessary.
11. Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.