Sunday, November 1, 2020

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 293


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.



Specified value



- Voltage[11.0...15.0] V



Continue with button F2



Test PWM signal for operating the suction fan.



Figure legend



- A -ConnectionTest cable 35-pin socket box



- 001 -Sockets of component N3/10 (ME-SFI [ME] control unit)



- 05 -35-pin socket box



- 050 -126-pin socket box



- 108 -Test cable 266 589 01 63 00



- N3/10 (ME-SFI [ME] control unit)



- II 1-63ConnectionTest cable



- III 64-126ConnectionTest cable



Test sequence



- Switch off ignition.



- 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