Replacing Pcm Display And Operator Control Unit

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 
  • Prior to disconnecting the control unit, switch off ignition and remove ignition key.
  • Ensure that the power supply is not interrupted during programming.
  • 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. 

1. Replace control unit.

   > 911019 REMOVING AND INSTALLING PCM DISPLAY AND OPERATOR CONTROL UNIT .

   > 915219 REMOVING AND INSTALLING CENTRAL COMPUTER 

2. Connect the Tester to the vehicle and start it. Switch on ignition.
3. Select the vehicle type if required.
4. Select the PCM  control unit in the overview.  Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.
5. Coding/programming  must be selected.
6. Automatic coding  must now be selected. Press F12 to continue.
7. The message "Coding was completed successfully" appears. Press F12 to continue.
8. Read out the fault memory  and erase it if necessary.
9. Exit the diagnostic application.
10. Switch off the ignition.
11. Disconnect the Tester from the vehicle.