Tuesday, May 25, 2021

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 564


Warning!Communication with ECU required.



0688



This fault can be ignored and erased.



Possible cause:



- This fault can be ignored and erased.



Affected functions:



- Engine diagnosis



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



Test 1: This fault can be ignored and erased.



1. This fault can be ignored and erased.



Note:This fault can be ignored and erased.



0693



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



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



Test 2: Possible cause:



- Heat management



Affected functions:



- Engine cooling



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.



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



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



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



- Fuse F32f71 (Fuse 71) is OK.



Actual value:



- Coolant temperature:Warning! Communication with ECU required.



Specified value



- Coolant temperature< 80锟斤拷 C



Proceed to 'Actuation' with F2



1.2. Test PWM signal for operating the suction fan.



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



Test prerequisite



- The ignition must be switched on.



Test sequence



- Check power supply at connector of component M4/7 (Engine and AC electric suction fan with integrated control) (pin 2) against ground.

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