2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 508

- G3/3 (Left O2 sensor, before TWC [KAT])

Affected functions:

- Engine diagnosis

- Exhaust system

-------------------------------------------------

Test 1: Check component G3/3 (Left O2 sensor, before TWC [KAT]).

1. Check component G3/3 (Left O2 sensor, before TWC [KAT]).

Warning!Communication with ECU required.

0446

Heating of component G3/3 (Left O2 sensor, before TWC [KAT]) : Short circuit to ground (P0051)

Possible cause:

- G3/3 (Left O2 sensor, before TWC [KAT])

Affected functions:

- Engine diagnosis

- Exhaust system

-------------------------------------------------

Test 1: Check component G3/3 (Left O2 sensor, before TWC [KAT]).

1. Check component G3/3 (Left O2 sensor, before TWC [KAT]).

Warning!Communication with ECU required.

0447

Heating of component G3/3 (Left O2 sensor, before TWC [KAT]) : Open circuit (P0050)

Possible cause:

- G3/3 (Left O2 sensor, before 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

-------------------------------------------------

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 G3/3 (Left O2 sensor, before TWC [KAT]).

Test 5: Check component G3/3 (Left O2 sensor, before 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 )