General notes
instrument panel test functions
The test functions are displayed in the TFT display of the instrument panel. The test functions are used in service to check the encoding. The test functions are also an aid to troubleshooting without the diagnosis system.
Starting the test functions
- Precondition: Terminal 15 ON , vehicle stationary, engine switched off
- Hold down the reset button in the instrument panel for 15 seconds
- Diagnosis system: Service functions > Body > Display and information functions > instrument cluster system test
Locking and unlocking test functions (test function 19 or 10)
Only the first two test functions are freely accessible. As of the 3rd test function, all other test functions are locked. Unlocking is only possible using test function 19 or 10. The test functions are unlocked by entering the total of the last 5 digits of the vehicle identification number.
Terminating the test function
- Terminal change
- Press the reset button for longer than 5 seconds
- Calling up Test function 21 or 04
Test functions of the multifunctional instrument display
As with the instrument cluster, the multifunctional instrument display also has test functions which are shown in the display. The multifunctional instrument display has a reduced range of test functions compared with the instrument cluster.
Starting the test functions
- Terminal 15 on
- Press and hold down the reset button in the multifunctional instrument display for 10 seconds.
All the described test functions can also be performed via the diagnosis system.
Display of test functions
The test functions are shown in the multifunctional instrument display in the position of the revcounter display in the TFT display. The range of test functions is reduced compared with the instrument cluster. It is not necessary to unlock the test functions in the multifunctional instrument display as in the instrument cluster.
The following test functions are available in the multifunctional instrument display:
- Identification
- System rest
- Fuel gauge 1
- Fuel gauge 2
- On-board computer average values
- Correction factor, consumption figures
Terminating the test function
- Terminal 15 off
- Press and hold down the reset button for longer than 10 seconds.