V40 L4-1.9L Turbo VIN 29 B4204T3 (2002)
The status of the navigator, ENT and RTN buttons on the audio unit front panel as well as the (optional) remote control buttons can be checked from
here. Press [ENT] to activate the function.
"OFF" is displayed until the actual button is pressed in. The status then changes to "ON". The status returns to "OFF" when the button is released. If the
status does not return to "OFF", the button is catching, has stuck in or there is another fault in the audio unit or remote control (optional).
Press [RTN] twice to return to the diagnostic menu.
1.5 Color screen
Will display one color at a time in the display. The order the colors are displayed in is black, red, green and blue. Press [ ENT ] to activate the function
and to change the color.
Press [RTN] to return to the diagnostic menu. There is a fault in the audio unit if the colors are not clear or as listed above.
2. Self-Diagnosis
