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Affected Terminals: 8, 9, 10, 11
Possible Trouble Codes: 121
Ignition ON
Radio OFF
Press F5 in the system main menu. Follow the
instructions in the TECH 1 display.
Start actuator test
Note:
If the instructions in the TECH 1 display are not
being followed exactly, this can lead to incorrect diagnosis.
When the radio is switched on, a self - test of the
radio display bus is started automatically. In this self - test, the
radio sends certain signals to the TID via the radio display bus.
TECH 1 reads these signals from the TID and evaluates them.
If the nominal value on the right does not appear in the
TECH 1 display, the TECH 1 names the exact fault and fault
location. In this, the following means:
SCL Serial Clock Line; Ter. 9
MRQ Master Request Line; Ter. 10
SDA Serial Data Line; Ter. 11
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