Monday, December 9, 2019

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2333


- Component X30/5 (Left voltage distributor (CAN) connector)



End of test



1.1.3.2.2.3. Test terminating resistor of CAN element in control module N3/10 (ME-SFI [ME] control unit).



Test terminating resistor of component N3/10 (ME-SFI [ME] control unit).



Test sequence



- Switch off ignition.



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



- Connector F is plugged in at control unit.



- Unplug the socket F from the wiring harness at the socket box.



- Measure resistance with multimeter between sockets (F.41) 11 and (F.54) 24 of the 35-pole socket box tester.



Specified value



- Resistor[115...125]ohms



Question



- Is the measurement value OK?



YES



The measurement value is OK.End of test



NO



The measurement value is not OK.Possible cause and remedy



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



End of test



1.1.3.3. Test with the aid of the measuring system



Test sequence



- Measurement of level voltage of engine CAN buses CAN bus High and CAN bus Low with the universal oscilloscope



- Separating one user from the connector strip X30/5 (Left voltage distributor (CAN) connector)



- Observe level voltage.



- Plug in connector again at connector strip X30/5 (Left voltage distributor (CAN) connector).



- Repeat this procedure for all CAN users.



Specified value



- As soon as the faulty branch was disconnected, the current image of the level voltage changes.



Possible cause of fault in the faulty branch



- X30/5 (Left voltage distributor (CAN) connector)



- Test connectors and wiring for CAN of engine compartment CAN control modules.



- Control unit



Communication with ECU required ( Measuring system )



1.1.3.4. Display CAN signals with the aid of the special tool 'Star Diagnosis CANtool'.



Important notes



- When CAN diagnosis is finished, the 8-pin CAN cable must be replaced with the diagnostic cable.



- Before values are read out from a control unit, the control unit must be reinitialized.



Continue with button F2



Test 1.1.3.4.1: Actual values via CAN ( Engine CAN bus )



1.1.3.4.1. Actual values via CAN ( Engine CAN bus )



Note



- The actual values shown on the following screens are only displayed and updated as long as the CAN bus is active.



Continue with button F2



Test 1.1.3.4.1.1: Function-specific actual values :



Test 1.1.3.4.1.2: Cruise control



Test 1.1.3.4.1.3: Drive authorization



Test 1.1.3.4.1.4: Control unit-specific actual values :

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