2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 567

- Connect socket box (35-pin) to component N3/10 (ME-SFI [ME] control unit).

- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).

- Switch on ignition.

Warning!

- Connection A of test cable 108 may NOT be connected to connection B of the 126-pin socket box (050).

Continue to test with button F2

Test prerequisite

- Coolant temperature< 80锟斤拷 C

- Charger connected(The battery voltage must be higher than 12.5 V.)

- Ignition ON

- Engine not running

- Vehicle stationary

- There is no fault code present for component B11/4 (Coolant temperature sensor).

- The fuses of component M4/7 (Engine and AC electric suction fan with integrated control) are OK.

Actual values:

- Coolant temperature:Warning! Communication with ECU required.

Continue with button F2

0695

M4/7 (Engine and AC electric suction fan with integrated control) : Output stage

Possible cause:

- Heat management

Affected functions:

- Engine cooling

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Test 1: Check component M4/7 (Engine and AC electric suction fan with integrated control).

1. Check component M4/7 (Engine and AC electric suction fan with integrated control).

Test 1.1: Check component M4/7 (Engine and AC electric suction fan with integrated control) by means of actuation.

Test 1.2: Test PWM signal for operating the suction fan.