Checking Era GLONASS Emergency Call System Battery

NOTIFICATION 

Voltage drop 

• Irreparable damage to control unit 
• Damage to control unit 
• Fault entries in the control unit 
• Control unit programming/coding is aborted 
• Malfunctions in the control unit, even during programming 
  1. → Switch off ignition before disconnecting the control unit.
  2. → Make sure that the power supply is not interrupted during programming/coding.
  3. → Connect the battery charger with at least > current 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. 

1. Connect the Tester to the service disconnector using > 9818/ET 500 - Y-connector, Russia  and start it. Switch on ignition.
2. IMPORTANT: Connect the red cable -1-  to the emergency call system socket.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   PIWIS Tester connection

3. Connect the black cable -2-  to the service disconnector socket in the vehicle.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   PIWIS Tester connection

4. Select the vehicle type if necessary.
5. Select Emergency call system (ERA GLONASS)  in the overview. Press F12 to continue.
6. Select Actual values/input signals. 
   1. 6.1  Select General. 
   2. 6.2  Select Back-up battery voltage. 
   3. 6.3  Back-up battery voltage > 7.0 volts: Back-up battery OK.

      Back-up battery voltage < 7.0 volts: Replace back-up battery.

      > 919655 - REPLACING ERA GLONASS EMERGENCY CALL SYSTEM BATTERY 

7. Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.