2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 541

- Exhaust system

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Test 1: Check component G3/5 (Left O2 sensor, after TWC [KAT]).

1. Check component G3/5 (Left O2 sensor, after TWC [KAT]).

Warning!Communication with ECU required.

0555

G3/5 (Left O2 sensor, after TWC [KAT]) : Discontinuity of signal line (P0160)

Possible cause:

- G3/5 (Left O2 sensor, after TWC [KAT])

- N10/1kI (Circuit 87 relay, engine)

- N10/1f57 (Fuse 57)

- Voltage supply via component Z7/36 (Circuit 87 M2e connector sleeve)

Affected functions:

- Engine diagnosis

- Exhaust system

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Test 1: Check power supply of component N3/10 (ME-SFI [ME] control unit).

Test 2: Arrangement of fuses

Test 3: Power supply

Test 4: Check component G3/5 (Left O2 sensor, after TWC [KAT]).

1. Check power supply of component N3/10 (ME-SFI [ME] control unit).

Test 1.1: Test voltage supply of circuit 87. ( Check using actual value )

Test 1.2: Test voltage supply of circuit 30.

Test 1.3: Test voltage supply of circuit 87.

Test 1.4: Test current consumption of component N10/1kR (Circuit 87 relay, engine).

Test 1.5: Test voltage supply of circuit 15.

1.1. Test voltage supply of circuit 87. ( Check using actual value )

Test prerequisite

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

- Ignition ON

Status of relevant actual value:

- Battery voltage:Warning! Communication with ECU required.

Specified value

- Battery voltage[11.0 ... 15.0] V

Question:Is the actual value o.k.?

YES

The actual value is okay.End of test

NO

The actual value is not o.k.Possible cause and remedy

- Test voltage supply of circuit 30.

- Test voltage supply of circuit 87.