Instrument Cluster System Test

System test

The system test permits simple, visual assessment of the functions in the instrument cluster:

• Pointer instruments
  

• Displays
  

• Backlighting of all displays
  

• Warning and indicator lamps
  

Selecting system test function:

The system test can be started at terminal R (radio position), terminal 15 ”ON” (ignition” ON”),vehicle and engine stopped. The system test can be started in different ways:

• by means of ”component activation” with a diagnosis telegram
  
• by calling up the test function 02 (system test).
  

The system test is started via the test function 02. This test function is not locked. The test functions are started by pressing the button in the instrument cluster (trip recorder reset button. Keep the button pressed for longer than 5 seconds. The display now contains

• Identification :01
  
• System test :02
  
• Service/Reset :03
  
• Consumption :04
  

Each brief press of the button increases the selected test function number displayed inversely. Longer pressing of the button (>2 seconds) starts the inversely displayed tester function (e.g. System test :02). The tester function is closed by switching off ”terminal R” (radio position) or pressing the button for a longer period (>6 seconds).

There is another possibility to start the tester functions. Here, ”terminal R” (radio position) and terminal 15 (ignition) must be switched off. For the start, press and hold the trip recorder reset button, switch on ”terminal R” (radio position) and then release the button.

The elements activated are:

• All pointer instruments (pointers are moved over the display field)
  
• All LC displays with a segment test and their background lighting
  

• All indicator and warning lamps
  
• Variable indicator lamp (check control symbols)
  
• Transmission program / gear display
  
• Turn signal indicators