2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2273

- A89 (DTR controller unit)

Test prerequisite

- The voltage test at component G1 (Battery) is o.k.

- Fuse 45 in component N10/1 (Driver-side SAM control unit with fuse and relay module) is o.k.

Test sequence

- Switch off ignition.

- Detach coupling at component A89 (DTR controller unit).

- 1.Measure direct voltage with multimeter between sockets 1 and 1.6

- Switch on ignition.

Specified value

- [11.0 ... 14.5] V

Question

- Is the value o.k.?

YES

Note

- In the event of stored faults with a high fault frequency count or in the event of customer complaints, check lines and connectors for loose

contact and corrosion..

End of test

NO

The measured value is not within the specified value range.Possible cause and remedy

- Cables between component N10/1 (Driver-side SAM control unit with fuse and relay module) and control module A89 (DTR controller unit)

- Plug connection X11/36