A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Component Y494 (Left camshaft intake solenoid) has an open circuit in the wiring. (P0020

2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)    
A L L  Diagnostic Trouble Codes ( DTC ): P Code Charts Component Y494 (Left camshaft intake solenoid) has an open circuit in the wiring. (P0020)
Component Y494 (Left camshaft intake solenoid) has an open circuit in the wiring. (P0020)

Possible cause:
- 49/4 (eft camshaft intake solenoid) - N10/1kI (Circuit 87 relay engine) - N10/1f43 (Fuse 43) - Voltage supply via component 7/38 (Circuit 87 M1i connector sleeve) Affected functions:
- Engine diagnosis - Engine output

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  Test 1: Check power supply of component N3/10 (ME-SFI [ME] control unit).
  Test 2: Arrangement of fuses
  Test 3: Power supply
  Test 4: Check component 49/4 (eft camshaft intake solenoid).
1. Check power supply of component N310 (ME-SI ME control unit).
  Test 1.1: Test voltage supply of circuit 87. ( Check using actual value )
  Test 1.2: Test voltage supply of circuit 30.
  Test 1.3: Test voltage supply of circuit 87.
  Test 1.4: Test current consumption of component N10/1k (Circuit 87 relay engine).
  Test 1.5: Test voltage supply of circuit 15.
1.1. Test voltage supply of circuit 87. ( Check using actual value ) Test prerequisite
- The voltage test at component 1 (Battery) is o.k. - Ignition ON Status of relevant actual value: - Battery voltage:Warning! Communication with ECU required. Specified value
- Battery voltage[11.0 ... 15.0] V Question:Is the actual value o.k.?
YES The actual value is okay.End of test
NO The actual value is not o.k.Possible cause and remedy
- Test voltage supply of circuit 30. - Test voltage supply of circuit 87.

1.2. Test voltage supply of circuit 30. Connect socket bo to component N310 (ME-SI ME control unit).
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
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)       Copyright ? 2013, ALLDATA     10.52SS        Page 2
- 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

Test voltage supply of circuit 30.
Test sequence
- Measure direct voltage with multimeter between sockets [ F.2 ] 98 and [ F.16 ] 112 of the 35-pole socket box tester. - Switch on ignition. Specified value
- Voltage[11.0...15.0] V 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
- F34f42 (Fuse 42) - ines End of test
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)       Copyright ? 2013, ALLDATA     10.52SS        Page 3

1.3. Test voltage supply of circuit 87. Connect socket bo to component N310 (ME-SI ME control unit).
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

Test voltage supply of circuit 87.
Test sequence
- Measure direct voltage with multimeter between sockets [ F.2 ] 98 and [F.3] 99 of the 126-pole socket box tester. - Measure direct voltage with multimeter between sockets [ F.4 ] 100 and [ F.5 ] 101 of the 126-pole socket box tester. - Measure direct voltage with multimeter between sockets [ F.6 ] 102 and [ F.5 ] 101 of the 126-pole socket box tester. - Switch on ignition. Specified value
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)       Copyright ? 2013, ALLDATA     10.52SS        Page 4
- Voltage[11.0...15.0] V Question
- Are the measurement values OK?

YES The measurement values are OK.Further possible causes of fault
- Test voltage supply of circuit 30.

NO The measurement values are not OK.Possible cause and remedy
- N10/1f43 (Fuse 43) - N10/1f44 (Fuse 44) - N10/1kI (Circuit 87 relay engine) - ines - N10/1 (river-side SAM control unit with fuse and relay module) End of test

1.4. Test current consumption of component N101k (Circuit 87 relay, engine). Connect socket bo to component N310 (ME-SI ME control unit).
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 5

Test current consumption of component N101k (Circuit 87 relay, engine).
Test sequence
- Measure direct current with multimeter between sockets [F.4] 100 and [F.27] 123 of the 126-pole socket box tester. - Switch on ignition. Specified value
- Amperage[0.1...0.3] A Question
- Is the measurement value OK?

YES The test was okay.End of test
NO The measurement value is not OK.Possible cause and remedy
- ines to component N10/1k (Circuit 87 relay engine) - N10/1k (Circuit 87 relay engine) End of test
1.5. Test voltage supply of circuit 15. Connect socket bo to component N310 (ME-SI ME control unit).
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 6

Test voltage supply of circuit 15.
Test sequence
- Measure direct voltage with multimeter between sockets [ F.2 ] 98 and [ F.15 ] 111 of the 35-pole socket box tester. - Switch on ignition. Specified value
- Voltage[11.0...15.0] V 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
- N10/1f52 (Fuse 52) - ines End of test

2. Arrangement of fuses Figure legend/figure
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)       Copyright ? 2013, ALLDATA     10.52SS        Page 7
- N10/1 (river-side SAM control unit with fuse and relay module) Fuses
- FuseF43-F67 elays
- I  N10/1kI (Circuit 87 relay engine) - K  N10/1kK (Circuit 87 relay chassis) -   N10/1k (Starter relay) - M  N10/1kM (SEQ [AS] pump control relay) - N  N10/1kN (Circuit 15 relay) - O  N10/1kO (FAN relay module) - P  N10/1kP (Circuit 15 relay) -   N10/1k (Air pump or oil cooler fan relay)

3. Power supply Voltage supply via component 738 (Circuit 87 M1i connector sleeve)
Possible cause and remedy
- Check voltage supply according to wiring diagram.

4. Check component Y494 (Left camshaft intake solenoid).
  Test 4.1: Test actuation of component 49/4 (eft camshaft intake solenoid).
  Test 4.2: Test current consumption of component 49/4 (eft camshaft intake solenoid).
4.1. Test actuation of component Y494 (Left camshaft intake solenoid). Test prerequisite
- Engine at idle - Vehicle stationary - Coolant temperature  80 C - Time since engine start 60 s Status of relevant actual value: - Temperature of coolant:Warning! Communication with ECU required. Note
- After the actuation it may be necessary to erase the fault memory! Proceed to Actuation with F2
4.2. Test current consumption of component Y494 (Left camshaft intake solenoid). 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!
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)       Copyright ? 2013, ALLDATA     10.52SS        Page 8
- 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

Test sequence
- Measure direct current with multimeter between sockets [F.4] 100 and [M.48] 48 of the 126-pole socket box tester. - Switch on ignition. Testing of maximum power consumption may be conducted for no longer than 5 s.Specified value
- Amperage[1.0...1.8] A 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
- N10/1f43 (Fuse 43) - ine from component 49/4 (eft camshaft intake solenoid) to component N3/10 (ME-SFI [ME] control unit) - 49/4 (eft camshaft intake solenoid) End of test