2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2276

- 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 current consumption of component N10/1kR (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

- Lines to component N10/1kR (Circuit 87 relay, engine)

- N10/1kR (Circuit 87 relay, engine)

End of test

1.1.3.2.1.3.4. Test voltage supply of circuit 15.

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

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 864

- Ambient temperature:Warning! Communication with ECU required.

Specified value

- The intake air temperature may be max. 5锟斤拷 C below the ambient temperature or 15锟斤拷 C above the ambient temperature.

Question

- Is the actual value for intake air temperature OK?

YES

The actual value is okay.Further procedure

- If only fault codes 1599 and 1600 occur in control unit ME-SFI, erase the fault memory.

- The component may not be replaced.

End of test

NO

The actual value is not o.k.Possible cause and remedy

- Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module N3/10 (ME-SFI [ME] control unit).

- Check internal resistance of component B2/5b1 (Intake air temperature sensor).

1.2. Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME 9.7.

Image legends

- Picture1

- B2/5 (Hot film mass air flow sensor)

- Connector (5-pin)

- Picture2

- B2/5 (Hot film mass air flow sensor)

- Connector (4-pin)

Test prerequisite

- The actual value is not o.k.

Test sequence

- Detach coupling at component B2/5 (Hot film mass air flow sensor).

- Switch on ignition.

Status of relevant actual value:

- Intake air temperature:Warning! Communication with ECU required.

Specified value

- If the connector is unplugged at component B2/5b1 (Intake air temperature sensor), value [ -40锟斤拷 C ] is displayed.

- Bridge pin 2 in pin 3 at the unplugged connection of component B2/5b1 (Intake air temperature sensor).The value is approx. [ 150锟斤拷 C ] for a

short period of time and drops back down to the substitute value of approx. [ -40锟斤拷 C ].

Question

- Is the actual value o.k.?

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2668

Test 1.3.2.1.2.2: Test of cable for voltage supply

Test 1.3.2.1.2.3: Test procedure ground cable

1.3.2.1.2.1. Test voltage of terminal 87 at control unit N47-5 (ESP, SPS [PML] and BAS control unit).

1.3.2.1.2.1. No further information available.

1.3.2.1.2.2. Test of cable for voltage supply

Test prerequisite

- Battery voltage is OK.

Test sequence

- Switch off ignition.

- Connect socket box.

- Switch on ignition.

- Measure direct voltage with multimeter between ground and socket (1.14) 14 of the 126-pole socket box tester.

Specified value

- Voltage[11.0...14.5] V

Question

- Is the measurement value OK?

YES

The measurement value is OK.Note

- Select further tests.

NO

The measurement value is not OK.Possible cause and remedy

- Lines

- F1f34 (Fuse 34)

End of test

1.3.2.1.2.3. Test procedure ground cable

Test prerequisite

- Battery voltage is OK.

Test sequence

- Switch off ignition.

- Connect socket box.

- W16/Measure resistance with multimeter between 3 and (2.23) 57 of the 35-pole socket box tester.

- W16/Measure resistance with multimeter between 3 and (2.47) 81 of the 35-pole socket box tester.

Specified value

- Resistor< 1ohms

Question

- Are the measurement values OK?

YES

The measurement values are OK.Note

- In the event of stored faults with a high fault frequency count or in the event of customer complaints, check lines and connectors for loose

contact and corrosion..

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2810

- 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 current consumption of component N10/1kR (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

- Lines to component N10/1kR (Circuit 87 relay, engine)

- N10/1kR (Circuit 87 relay, engine)

End of test

1.3.2.1.1.3. Test voltage supply of circuit 15.

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

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 741

1. Check component T1/x (ignition coil(s)).

Test 1.1: Check component T1/1 (ignition coil cylinder 1).

1.1. Check component T1/1 (ignition coil cylinder 1).

Warning!Hazard as a result of high voltage at the ignition system!

- Electronic ignition systems operate within a hazardous power range both at the low voltage side (primary circuit) as well as on the high

voltage side (secondary circuit).

- Contacts with such parts can result in burns, heart flutter or cardiac arrest.

Rules of conduct and protective measures

- Persons with heart pacemakers must not perform any work on the ignition system.

- Switch off the ignition when performing work on the ignition system.

- Do not touch any parts of the ignition system when starting the engine or when the engine is running.

- Wear protective shoes with rubber soles.

- Do not install any uninsulated adapters into the ignition cables.

1.1. No further information available.

1014

The control line to the ignition coil of cylinder 1 has a short circuit to ground. (P2300)

Possible cause:

- Line from ignition coil to control unit

Affected functions:

- Engine running

-------------------------------------------------

Test 1: Check component T1/x (ignition coil(s)).

1. Check component T1/x (ignition coil(s)).

Test 1.1: Check component T1/1 (ignition coil cylinder 1).

1.1. Check component T1/1 (ignition coil cylinder 1).

Warning!Hazard as a result of high voltage at the ignition system!

- Electronic ignition systems operate within a hazardous power range both at the low voltage side (primary circuit) as well as on the high

voltage side (secondary circuit).

- Contacts with such parts can result in burns, heart flutter or cardiac arrest.

Rules of conduct and protective measures

- Persons with heart pacemakers must not perform any work on the ignition system.

- Switch off the ignition when performing work on the ignition system.

- Do not touch any parts of the ignition system when starting the engine or when the engine is running.

- Wear protective shoes with rubber soles.

- Do not install any uninsulated adapters into the ignition cables.

1.1. No further information available.

1015

The control line to the ignition coil of cylinder 1 has an open circuit. (P0351)

Possible cause:

- Line from ignition coil to control unit

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2760

Test 1.3.2.1.1: Check power supply at control unit ME-SFI.

Test 1.3.2.1.2: Check power supply at control unit ESP.

Test 1.3.2.1.3: Check power supply at control unit ETC.

Test 1.3.2.1.4: Check power supply at control unit ESM.

Test 1.3.2.1.5: Check power supply at control unit EZS.

Test 1.3.2.1.6: Check power supply at control unit A1 (Instrument cluster).

Test 1.3.2.1.7: Check power supply at control unit N80 (Steering column module).

Test 1.3.2.1.8: Check power supply at control unit N71 (Headlamp range adjustment control module).

Test 1.3.2.1.9: Check power supply at control unit N93 (Central gateway control unit).

Test 1.3.2.1.10: Check power supply at control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit).

1.3.2.1.1. Check power supply at control unit ME-SFI.

Test 1.3.2.1.1.1: Test voltage supply of circuit 30.

Test 1.3.2.1.1.2: Test current consumption of component N10/1kR (Circuit 87 relay, engine).

Test 1.3.2.1.1.3: Test voltage supply of circuit 15.

1.3.2.1.1.1. Test voltage supply of circuit 30.

Connect socket box to component N3/10 (ME-SFI [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 (204.054) V6-3.0L (272.947) Page 418

Figure legend

- 055Measuring beakerY62 (Fuel injectors)

Test sequence

- Switch off ignition.

- Remove fuel rail together with component Y62y2 (Fuel injector cylinder 2).

- Bridge between sockets (F.4) 100 and (F.17) 113 of the 126-pole socket box tester.

- Switch on ignition.

Specified value

- Component Y62y2 (Fuel injector cylinder 2) must not drip.

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2164

- 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 :

Test 1.1.3.4.1.5: Electronic selector module

Test 1.1.3.4.1.6: Transmission control

Test 1.1.3.4.1.7: Motor electronics

Test 1.1.3.4.1.8: Steering column module

1.1.3.4.1.1. Function-specific actual values :

1.1.3.4.1.1. No further information available.

1.1.3.4.1.2. Cruise control

Warning!Communication with ECU required.

1.1.3.4.1.3. Drive authorization

Warning!Communication with ECU required.

1.1.3.4.1.4. Control unit-specific actual values :

1.1.3.4.1.4. No further information available.

1.1.3.4.1.5. Electronic selector module

Warning!Communication with ECU required.

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1575

YES

The measurement value is OK.Figure legend 1:N71 (Headlamp range adjustment control module)Figure legend 2:N10/1 (Driver-side SAM control

unit with fuse and relay module)Possible cause or remedy in case of malfunction

- Inspect plug connections N71x1 and (N10/1) I10 for damage, loose contact and corrosion, and repair if necessary.

- N71 (Headlamp range adjustment control module)

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1115

YES

Test sequence

- Switch off ignition.

- Separate plug connection at transmission.

- Measure voltage in transmission wiring harness using a multimeter.

- Measure resistance with multimeter between ground and 3

Specified value

- Resistance measured: [OL] ohms

Question

- Is the measurement value OK?

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 424

- Y62y2 (Fuel injector cylinder 2)

1.1.4. Inspect component Y62y2 (Fuel injector cylinder 2) for leaks.

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

Figure legend

- 055Measuring beakerY62 (Fuel injectors)

Test sequence

- Switch off ignition.

- Remove fuel rail together with component Y62y2 (Fuel injector cylinder 2).

- Bridge between sockets (F.4) 100 and (F.17) 113 of the 126-pole socket box tester.

- Switch on ignition.

Specified value

- Component Y62y2 (Fuel injector cylinder 2) must not drip.

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 650

Test prerequisite

- The actuation was not okay.

Test sequence

- Switch off ignition.

- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).

- Measure direct current with multimeter between sockets (F.4) 100 and [M.53] 53 of the 126-pole socket box tester.

- Switch on ignition.

Specified value

- Amperage[0.3...0.6] 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

- N10/1f57 (Fuse 57)

- N10/1kI (Circuit 87 relay, engine)

- Line between component N3/10 (ME-SFI [ME] control unit) and component Y32 (Air pump switchover valve)

- Line between component N10/1 (Driver-side SAM control unit with fuse and relay module) and component Y32 (Air pump switchover valve)

- Y32 (Air pump switchover valve)

End of test

0814

Malfunction of secondary air injection at left bank of cylinders (function chain) (P0410)

Possible cause:

- Secondary air injection

- M33 (electric air pump)

- Y32 (Air pump switchover valve)

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 44

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

- N10/1f57 (Fuse 57)

- Lines

End of test

1.3.2.1.1.2. Test current consumption of component N10/1kR (Circuit 87 relay, engine).

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

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2850

YES

The measurement value is OK.End of test

NO

The measurement value is not OK.Possible cause and remedy

- Line from component N3/10 (ME-SFI [ME] control unit) to component X63/4 (CAN databus adapter connector, 2-pin)

- Test terminating resistor of component X63/4 (CAN databus adapter connector, 2-pin).

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

End of test

1.3.2.2.1.2. Perform measurement at component N3/10 (ME-SFI [ME] control unit).

Test total resistance of the CAN engine.

Test sequence

- Switch off ignition.

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

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

Specified value

- Resistor[55...65]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

- Line from component N3/10 (ME-SFI [ME] control unit) to component X63/4 (CAN databus adapter connector, 2-pin)

- Test terminating resistor of component X63/4 (CAN databus adapter connector, 2-pin).

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1984

NO

The measurement value is not OK.Figure legend 1:N71 (Headlamp range adjustment control module)Figure legend 2:N10/1 (Driver-side SAM

control unit with fuse and relay module)Possible cause and remedy

- Cable (N10/1) I10.3 - (N71) 19 is faulty .

- Cable (N71) 20 - W15/1 (Ground (right footwell)) is faulty .

- N10/1 (Driver-side SAM control unit with fuse and relay module)

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1190

YES

The measurement value is OK.End of test

NO

The measurement value is not OK.Possible cause and remedy

- Line from component N10/1 (Front SAM control unit with fuse and relay module) to component N15/6 (Sprintshift control module)

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Check fuse "f63" (voltage supply from control unit ASG) in component N10/1 (Front SAM control unit with fuse and relay module).

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 830

- 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

- 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)

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1004

The actual value is not o.k.Possible cause and remedy

- Check lines from component B11/4 (Coolant temperature sensor) to component N3/10 (ME-SFI [ME] control unit).

End of test

1.3. Check internal resistance of component B11/4 (Coolant temperature sensor).

Test prerequisite

- The actual value is not o.k.

Test sequence

- Switch off ignition.

- Disconnect connector at component B11/4 (Coolant temperature sensor).

- Measure resistance with multimeter between pins ( B11/4 ) 1 and ( B11/4 ) 2

Specified values

- Resistor(20锟斤拷 C): [3030...3130]ohms

- Resistor(30锟斤拷 C]: [1950...2050]ohms

- Resistor(40锟斤拷 C): [1275...1375]ohms

- Resistor(50锟斤拷 C): [850...950]ohms

- Resistor(60锟斤拷 C): [600...650]ohms

- Resistor(70锟斤拷 C): [420...460]ohms

- Resistor(80锟斤拷 C): [305...335]ohms

- Resistor(90锟斤拷 C): [220...240]ohms

- Resistor(100锟斤拷 C): [160...180]ohms

- Resistor(110锟斤拷 C): [120...140]ohms

Question

- Are the measurement values OK?

YES

The measurement values are OK.End of test

NO

The measurement values are not OK.Possible cause and remedy

- B11/4 (Coolant temperature sensor)

End of test

1599

Plausibility error between signal of temperature sensor in intake pipe and signal of outside temperature sensor (P0071)

Possible cause:

- Ambient temperature values are implausible.

Affected functions:

- Engine diagnosis

-------------------------------------------------

Test 1: Ambient temperature

1. Ambient temperature

Test 1.1: Check component B14 (Ambient temperature display temperature sensor).

Test 1.2: Check component B2/5b1 (Intake air temperature sensor).

1.1. Check component B14 (Ambient temperature display temperature sensor).

Test prerequisites

- The power supply of component N10/1 (Driver-side SAM control unit with fuse and relay module) is OK.

- Fault code 9063 is current, and (or) at least one of the relevant actual values is not OK.

Test sequence

- Detach coupling at component B14 (Ambient temperature display temperature sensor).

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 686

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)

- Lines

End of test

0866

Voltage supply of component Motor electronics / Battery voltage too low (P0562)

Possible cause:

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

Affected functions:

- Engine diagnosis

-------------------------------------------------

Test 1: Check power supply of component N3/10 (ME-SFI [ME] control unit).

1. Check power supply of component N3/10 (ME-SFI [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 current consumption of component N10/1kR (Circuit 87 relay, engine).

Test 1.4: 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 G1 (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

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1397

NO

The measurement value is not OK.Figure legend 1:N71 (Headlamp range adjustment control module)Figure legend 2:N10/1 (Driver-side SAM

control unit with fuse and relay module)Possible cause and remedy

- Cable (N10/1) I10.3 - (N71) 19 is faulty .

- Cable (N71) 20 - W15/1 (Ground (right footwell)) is faulty .

- N10/1 (Driver-side SAM control unit with fuse and relay module)