Tuesday, 3 December 2019

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1179


1.1.1.3.2. No further information available.



1.1.1.4. Possible aids and their usage



Evaluation of CAN fault codes



- The control units present in the vehicle (actual configuration) are compared with the coding in control unit CGW (specified configuration).



- Filtering and evaluation of all CAN timeout fault codes present in the vehicleThe result of the evaluation leads to the required test steps.



Multimeter



- Aids for voltage and resistance measurement in menu item 'Measurements with multimeter on CAN network'



Measuring system



- Aid for graphic representation of CAN signal and voltage levels



- The specified characteristics shown in Measurement Technology are used to recognize changed CAN voltage levels, which can be caused by



faulty CAN components.



- Possible procedure: Disconnect and then reconnect the CAN bus subscribers at the voltage distributor one at a time.Compare the pass image



with the actual image from the oscilloscope.



Star Diagnosis CANtool



- Aids for representation of actual values and identification of bus wake-up events and bus keepawake events



Continue with button F2



1.1.1.4. No further information available.



1.1.2. Read current CAN configuration and CAN fault codes



Warning!Communication with ECU required.



1.1.3. Further CAN test options



Test 1.1.3.1: Display CAN signals with the aid of the special tool 'Star Diagnosis CANtool'.



Test 1.1.3.2: Information to engine compartment CAN network



Test 1.1.3.3: Measurements with multimeter on CAN network



Test 1.1.3.4: Test with the aid of the measuring system



1.1.3.1. 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 1.1.3.1.1: Actual values via CAN ( Engine CAN bus )

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