2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1671

contact and corrosion..

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Ground cable

- W9 (Ground (at front left headlamp unit))

End of test

Part 2

One or more signals sent from control unit N73 (EIS [EZS] control unit) via the CAN bus is implausible.

1.1.3.2.1.8. Check power supply at control unit N51 (AIRmatic with ADS control module).

Test 1.1.3.2.1.8.1: Test voltage supply of circuit 30.

Test 1.1.3.2.1.8.2: Test voltage supply of circuit 87.

1.1.3.2.1.8.1. Test voltage supply of circuit 30.

Test 1.1.3.2.1.8.1.1: Test voltage of terminal 30 at control unit N51 (AIRmatic with ADS control module).

Test 1.1.3.2.1.8.1.2: Test of cable for voltage supply

Test 1.1.3.2.1.8.1.3: Test procedure ground cable

1.1.3.2.1.8.1.1. Test voltage of terminal 30 at control unit N51 (AIRmatic with ADS control module).

Test prerequisite

- Battery voltage is OK.

Status of the relevant actual values:

- Terminal 30:Warning! Communication with ECU required.

Test sequence

- Switch off ignition.

- Connect socket box.

- Switch on ignition.

- Measure direct voltage with multimeter between sockets (2.21) 55 and (2.47) 81 of the 126-pole socket box tester.

Specified value

- [11...14 V]

Question

- Is the measurement value OK?

YES

The measurement value is OK.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 actual value is not o.k.Note

- This test did not produce any clear result.

- Select further tests.

1.1.3.2.1.8.1.2. Test of cable for voltage supply

Test prerequisite

- Battery voltage is OK.