2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)
A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts 0365
Operational fault of component 2 (generator) (P0620)
Possible cause:
- Poly--belt Affected functions:
- Battery / On-board electrical system
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Test 1: Poly--belt
1. Poly-V-belt Possible cause
- Poly -belt thrown or broken Question
- Is the poly- belt OK?
YES 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
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 2
Test prerequisites
- Check plug connection and screw connection B to battery, prefuse box and alternator for correct seating. Test sequence
- Switch off ignition. - etach sockets F and M at component N3/10 (ME-SFI [ME] control unit). - Measure direct voltage with multimeter between sockets [ F.2 ] 98 and [ M.45 ] 45 of the 126-pole socket box tester. Specified value
- oltage [ > 11 ] Question
- Is the measurement value OK?
YES Test sequence
- Switch off ignition. - Reconnect detached couplings. - isconnect 2-pin plug from component Generator. - Connect adapter cable no. 220 589 00 99 35 at component Generator. - Connect multimeter to red socket of adapter and socket box. - Measure direct voltage with multimeter between pin [G2] 2 and socket [ M.45 ] 45 of the 126-pole socket box tester. - Switch on ignition. Specified value
- oltage [approx.0 m ] Question
- Is the measurement value OK?
YES The measurement value is OK.Other possible cause of fault
- The alternator regulator is defective End of test
NO The measurement value is not OK.Possible cause and remedy
- Check lines and connectors for proper connection and locking, loose contact, damage, contamination and corrosion. - Check engine wiring harness for correct routing, chafe marks and proper contact at the control unit. For cleaning, the connector may only be blown out with compressed air! Cleaning agents must not be used.
NO The measurement value is not OK.Possible cause and remedy
- Check LIN lines between control unit N3/10 (ME-SFI [ME] control unit) and component Generator. Continue with button F2
Test sequence
- Switch off ignition. - Reconnect detached couplings. - isconnect 2-pin plug from component Generator. - Connect adapter cable no. 220 589 00 99 35 at component Generator. - Connect multimeter to red socket of adapter and socket box. - Measure direct voltage with multimeter between pin [G2] 2 and socket [ M.45 ] 45 of the 126-pole socket box tester. - Switch on ignition. Specified value
- oltage [approx.0 m ] Question
- Is the measurement value OK?
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 3
YES The measurement value is OK.Other possible cause of fault
- The alternator regulator is defective End of test
NO The measurement value is not OK.Possible cause and remedy
- Check lines and connectors for proper connection and locking, loose contact, damage, contamination and corrosion. - Check engine wiring harness for correct routing, chafe marks and proper contact at the control unit. For cleaning, the connector may only be blown out with compressed air! Cleaning agents must not be used.
NO Remedy
- Repair component Poly--belt. End of test
