Saturday, May 2, 2020

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 559


Warning!Communication with ECU required.



ME9.7



Misfiring of cylinder 3 : Worsening of exhaust emission values (P0303)



Possible cause:



- Combustion misfirings



Affected functions:



- Engine diagnosis



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Test 1: Combustion misfirings



1. Combustion misfirings



Warning!Communication with ECU required.



722.9 (7-gear) ETC2 as of 2008



The voltage supply of the speed sensors is faulty. ( Undervoltage )



Possible cause:



- Local undervoltage of component Speed sensors



Affected functions:



- Automatic transmission Function



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Test 1: Remedial action if faulty voltage supply to rpm sensors ( Undervoltage )



1. Remedial action if faulty voltage supply to rpm sensors ( Undervoltage )



Operation number of operation texts and work units or standard texts and flat rates:27-0641Cause



- The voltage supply of the speed sensors is faulty.(Undervoltage)



REMEDY



- Disassemble and assemble automatic transmission using the repair instructions.



- Exchange electrohydraulic control unit.



Notes on submitting warranty or goodwill claimsSEAG damage code (7 digits): 54553 73IMPORTANT NOTEFollowing the repair measures, the



following checks MUST be carried out using the Diagnosis Assistance System, menu 'Initial startup'



- Initial startup with manual settings input for new control unit



Continue with button "F2"