Thursday, September 30, 2021

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 654


- Measure direct current with multimeter between sockets [F.98] 2 and [F.19] 115 of the 126-pole socket box tester.



Specified value



- Voltage[11.0...15.0] V



Question



- Is the measurement value OK?



YES



The measurement value is OK.Further possible causes of fault



- M33 (electric air pump)



End of test



NO



The measurement value is not OK.Possible cause and remedy



- Voltage supply of component N10/1kR (Air pump or oil cooler fan relay)



- N10/1kR (Air pump or oil cooler fan relay)



- Lines to component M33 (electric air pump)



- M33 (electric air pump)



End of test



NO



The measurement value is not OK.Possible cause and remedy



- Lines to component N10/1kR (Air pump or oil cooler fan relay)



- N10/1kR (Air pump or oil cooler fan relay)



End of test



3. Check component Y32 (Air pump switchover valve).



Test 3.1: Test actuation of component Y32 (Air pump switchover valve).



Test 3.2: Test current consumption of component Y32 (Air pump switchover valve).



3.1. Test actuation of component Y32 (Air pump switchover valve).



Test sequence



- Switch on ignition.



- Actuate component Y32 (Air pump switchover valve).(Proceed to 'Actuation' with F2)



Warning!Communication with ECU required.



3.2. Test current consumption of component Y32 (Air pump switchover valve).



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



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

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