Initial Inspection and Diagnostic Overview

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 trip recorder reset button in the instrument cluster. Keep the button pressed for longer than 15 seconds.
The display now contains: 01._ _
Briefly pressing the button switches to the system test.
The display now contains: 02._ _
Briefly pressing again starts the system test.

The elements activated are:
- All pointer instruments
- All LC displays with a segment test and their background lighting
- All indicator and warning lamps
- Variable indicator lamp (check control symbols)
- Gearbox program / gear display
- Turn signal indicators