2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2041

1.1.3.2.1.4. Check power supply at control unit N15/3 (ETC [EGS] control unit).

Test 1.1.3.2.1.4.1: Guided test

1.1.3.2.1.4.1. Guided test

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

- Battery has incorrect charge state or is faulty.

- Local undervoltage of component N15/3 (ETC [EGS] control unit)

Test sequence

- Erase fault memory.

Continue with button "F2"

Warning!Communication with ECU required.

1.1.3.2.1.5. Check power supply at control unit N15/5 (Electronic selector lever module control unit).

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

- Switch off ignition.

- Disconnect connector at component N15/5 (Electronic selector lever module control unit).

- Switch on ignition.

- [A.2] Measure direct voltage with multimeter between 2 and 1 [A.1]

Status of relevant actual value:

- Supply voltage (tml. 15):Warning! Communication with ECU required.

Specified value

- Voltage[7.0...16.0] V

Question

- Is the measurement value OK?

YES

The measurement value is OK.Possible cause and remedy

- Replace component Floor-mounted shift.

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Check fuse f55 (voltage supply from control unit ESM) in component N10/1 (Front SAM control unit with fuse and relay module).

- Check all affected plugs, connectors and electrical components for damage, loose contact, corrosion etc. and repair if necessary.

End of test

1.1.3.2.1.6. Check power supply at control unit N15/6 (Sprintshift control module).

Test voltage supply of circuit 30.

Operation number of operation texts and work units or standard texts and flat rates:26-0641Test sequence

- Switch off ignition.

- Connect socket box to component N15/6 (Sprintshift control module).

- Measure direct voltage with multimeter between sockets (B.36) 36 and (B.38) 38 of the 126-pole socket box tester.

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2229

The measurement value is OK.Cause

- Control module has an internal error.

REMEDY

- Disassemble and assemble automatic transmission using the repair instructions.

- Exchange electrohydraulic control unit.

IMPORTANT NOTEFollowing the repair measures, the following checks MUST be carried out using the Diagnosis Assistance System, menu

'Control unit adaptations'

- Flash programming of control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit)

- SCN coding

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Diagnostic cable has short to ground.

- Inspect wiring and connectors at connection points for loose contacts, damage and corrosion. Repair or replace as required.

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Diagnostic cable has open circuit.

- Inspect wiring and connectors at connection points for loose contacts, damage and corrosion. Repair or replace as required.

End of test

NO

The measurement value is not OK.Further causes

- Voltage supply line is not OK.

Press button "F2" for further tests

1.1.3.2.1.13. No further information available.

1.1.3.2.2. Resistance test of engine compartment CAN

Test 1.1.3.2.2.1: Test total resistance of engine compartment CAN.

Test 1.1.3.2.2.2: Test terminating resistor of component X30/5 (Left voltage distributor (CAN) connector).

Test 1.1.3.2.2.3: Test terminating resistor of CAN element in control module N3/10 (ME-SFI [ME] control unit).

1.1.3.2.2.1. Test total resistance of engine compartment CAN.

Test 1.1.3.2.2.1.1: Perform measurement at component X30/5 (Left voltage distributor (CAN) connector).

Test 1.1.3.2.2.1.2: Perform measurement at component N3/10 (ME-SFI [ME] control unit).

1.1.3.2.2.1.1. Perform measurement at component X30/5 (Left voltage distributor (CAN) connector).

Test total resistance of engine compartment CAN.

Figure legend

- X30/5 (Left voltage distributor (CAN) connector)

Test sequence

- Switch off ignition.

- Measurement with multimeter

- (X30/5) 2.Measure resistance with multimeter between pins 2 and 2.1 (X30/5)

Adapter cable no. W220 589 00 99 36 may be used.Specified value

- [55...65]ohms

Question:

- Is the measured value within the specified value range?

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2314

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).

- Test cables

End of test

1.1.3.2.1.7. Check power supply at control unit N47-5 (ESP, SPS [PML] and BAS control unit).

Test 1.1.3.2.1.7.1: Test voltage of terminal 87 at control unit N47-5 (ESP, SPS [PML] and BAS control unit).

Test 1.1.3.2.1.7.2: Test of cable for voltage supply

Test 1.1.3.2.1.7.3: Test procedure ground cable

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

Test prerequisite

- Battery voltage is OK.

Test sequence

- Switch off ignition.

- Connect socket box.

- Switch on ignition.

- Measure direct voltage with multimeter between sockets (2.23) 57 and (2.14) 48 of the 126-pole socket box tester.

Specified value

- [11...14 V]

Question

- Is the measurement value OK?

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 929

- Lines

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

End of test

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

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

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.

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- 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.

1.1.3.4.1.6. Transmission control

Warning!Communication with ECU required.

1.1.3.4.1.7. Motor electronics

Warning!Communication with ECU required.

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2412

- 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 1757

- Test terminating resistor of component X30/5 (Left voltage distributor (CAN) connector).

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

End of test

1.1.3.2.2.2. Test terminating resistor of component X30/5 (Left voltage distributor (CAN) connector).

Test terminating resistor of component X30/5 (Left voltage distributor (CAN) connector).

Test sequence

- Switch off ignition.

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

- Disconnect coupling F at 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[115...125]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 X30/5 (Left voltage distributor (CAN) connector) to component N3/10 (ME-SFI [ME] control unit)

- Component X30/5 (Left voltage distributor (CAN) connector)

End of test

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

Test terminating resistor of component N3/10 (ME-SFI [ME] control unit).

Test sequence

- Switch off ignition.

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

- Connector F is plugged in at control unit.

- Unplug the socket F from the wiring harness at the socket box.

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

Specified value

- Resistor[115...125]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

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

End of test

1.1.3.3. Test with the aid of the measuring system

Test sequence

- Measurement of level voltage of engine CAN buses CAN bus High and CAN bus Low with the universal oscilloscope

- 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

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1861

1.1.3.4.1.8. Steering column module

Warning!Communication with ECU required.

2. Check component N80 (Steering column module).

Read and process fault code from control module N80 (Steering column module).

Possible cause and remedy

- Read and process fault code from control module N80 (Steering column module).

End of test

Part 1

No CAN message was received from control unit N80 (Steering column module).

Possible cause:

- Check the CAN communication with control unit N80 (Steering column module).

- Chassis CAN bus

Affected functions:

- CAN Communication

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

Test 1: Engine compartment CAN test

Test 2: Chassis CAN bus

Test 3: CAN communication is faulty.

1. Engine compartment CAN test

Test 1.1: Engine compartment CAN test

1.1. Engine compartment CAN test

Test 1.1.1: Procedure in case of CAN faults

Test 1.1.2: Read current CAN configuration and CAN fault codes

Test 1.1.3: Further CAN test options

1.1.1. Procedure in case of CAN faults

Test 1.1.1.1: How do I quickly reach my goal?

Test 1.1.1.2: General test information

Test 1.1.1.3: General CAN fundamentals

Test 1.1.1.4: Possible aids and their usage

1.1.1.1. How do I quickly reach my goal?

How do I quickly reach my goal?First call up menu item 'Evaluation of CAN fault codes' in case of CAN timeout fault codes and communication

errors.The resulting tests must be performed.Menu item 'Further CAN test options' should only be called up if the above-specified tests do not

produce the desired result.Note:Menu item 'General test information' can be called up for an explanation of the different CAN fault types.

1.1.1.2. General test information

Notes on CAN fault codes:CAN timeout fault

- A CAN timeout fault code is set due to the absence of a CAN input signal.The cause of this may be not only the transmitter control unit, but

also the CAN networking.

- For example:No CAN message was received from control unit A.

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1631

- 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 2823

- Voltage[8,5...16,4] V

Question

- Is the measurement value OK?

YES

The measurement value is OK.Possible cause of fault

- The conductors in the electrohydraulic control unit are interrupted.

- Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.

Possible remedy

- Replace component Y3/8 (Electric control unit (VGS)).

Following 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

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NO

The measurement value is not OK.Possible cause and remedy

- F34f42 (Fuse 42)

- Lines

End of test

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

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

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

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2925

Functional CAN fault

- A functional CAN fault code is set because of an implausible CAN input signal.The cause of this is not the CAN networking, but the

transmitter control unit or its sensors.

- For example:CAN signal 'A' from control unit B is implausible.

Notes on CAN faults that cannot be read out as fault codes.Bus wake-up event

- An event that wakes up the bus without reason is designated a bus wake-up event.

- The cause of this is not the CAN networking, but the transmitter control unit or its sensors.

- Further possible causes of fault:

- Magnetic fields caused by nearby high-voltage installations, railroad installations or power plants.

- Magnetic fields can radiate on to lines and control units in rare cases and cause undefined behavior in the control units.

- The special tool 'Star Diagnosis CANtool' can be used to log bus wake-up events, bus keepawake events and other signals.

Bus keepawake event

- When a control unit keeps communication on the bus awake without reason, this is designated a bus keepawake event.

- The cause of this is not the CAN networking, but the transmitter control unit or its sensors.

- Further possible causes of fault:

- Magnetic fields caused by nearby high-voltage installations, railroad installations or power plants.

- Magnetic fields can radiate on to lines and control units in rare cases and cause undefined behavior in the control units.

- The special tool 'Star Diagnosis CANtool' can be used to log bus wake-up events, bus keepawake events and other signals.

1.1.2. No further information available.

1.1.3. General CAN fundamentals

Test 1.1.3.1: Low-Speed CAN (83,3 kBit/s)

Test 1.1.3.2: High-Speed CAN (125 kBit/s , 500 kBit/s)

1.1.3.1. Low-Speed CAN (83,3 kBit/s)

General CAN fundamentals

Low-Speed CAN (83,3 kBit/s)

- 83,3 kBit/s : For example:Interior CAN busSeries 211

- This CAN bus enables single-wire mode.

- 'Single-wire mode' means that fault-free communication between the control units is still possible even if one of the two CAN lines fails.

- This CAN bus does not require external terminating resistors.

Legend and description for figure 1CAN-H: CAN bus HighCAN-L: CAN bus LowECU 1 ... n: Control unit 1 ... nLegend and description for figure

2U 1: Specification approx. 3,6 voltsU 2: Specification approx. 0 voltsU 3: Specification approx. 2,5 voltsU 4: Specification approx. 1,4 voltsU 5:

Specification approx. 5 voltsContinue with button F2

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1278

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)

- Lines

End of test

1.1.3.2.1.3.3. 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 2390

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 583

The signal from component Y3/8n3 (Output speed sensor (VGS)) is not available.

Possible cause:

- Y3/8n3 (Output speed sensor (VGS))

Affected functions:

- Automatic transmission Function

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

Test 1: Remedial action for non-available signal from component Y3/8n3 (Output speed sensor (VGS))

1. Remedial action for non-available signal from component Y3/8n3 (Output speed sensor (VGS))

Warning!Communication with ECU required.

0723

Component Y3/8n3 (Output speed sensor (VGS)) is defective.

Possible cause:

- Y3/8n3 (Output speed sensor (VGS))

Affected functions:

- Automatic transmission Function

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

Test 1: Remedial action if component 'Y3/8n3 (Output speed sensor (VGS))' is faulty

1. Remedial action if component 'Y3/8n3 (Output speed sensor (VGS))' is faulty

Warning!Communication with ECU required.

0729

The gear is implausible or the transmission is slipping. ( 6. gear )

Possible cause:

- Mechanical or hydraulic defect in the transmission ( 6. gear )

Affected functions:

- Automatic transmission Function

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

Test 1: Remedial action on implausible gear or slipping transmission ( 6. gear )

1. Remedial action on implausible gear or slipping transmission ( 6. gear )

Check oil level in automatic transmission.

IMPORTANT NOTE

- Do not unplug the STAR DIAGNOSIS unit from the diagnostic socket during the procedure.

Possible cause and remedy

- The oil level in the automatic transmission is too low.

-

Possible remedy

- Check oil level in automatic transmission.

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 585

- The fault memory is erased by pressing button "F2".

Continue with button "F2"

Warning!Communication with ECU required.

ME9.7

Continuous camshaft adjustment ( RIGHT ): Incorrect position of the exhaust camshaft (P0014)

Possible cause:

- Stepless adjustment of exhaust camshaft of right cylinder bank

Affected functions:

- Engine output

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

Test 1: Exhaust camshaft of right cylinder bank

1. Exhaust camshaft of right cylinder bank

Warning!Communication with ECU required.

722.9 (7-gear) ETC2 as of 2008

The gear is implausible or the transmission is slipping. ( 2. gear )

Possible cause:

- Mechanical or hydraulic defect in the transmission ( 2. gear )

Affected functions:

- Automatic transmission Function

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

Test 1: Possible causes and remedial action when fault code 0732 is displayed

1. Possible causes and remedial action when fault code 0732 is displayed

Check oil level in automatic transmission.

IMPORTANT NOTE

- Do not unplug the STAR DIAGNOSIS unit from the diagnostic socket during the procedure.

Possible cause and remedy

- The oil level in the automatic transmission is too low.

-

Possible remedy

- Check oil level in automatic transmission.

NOTE

- Refill oil in automatic transmission up to maximum oil level mark at oil temperature of 80锟斤拷 C.

- (Refer to repair instructions: automatic transmission 722.9)

Notes on submitting warranty or goodwill claimsSEAG damage code (7 digits): 27 001 75Question

- Is the fluid level in the automatic transmission OK?

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1652

The measurement value is OK.Cause

- Control module has an internal error.

REMEDY

- Disassemble and assemble automatic transmission using the repair instructions.

- Exchange electrohydraulic control unit.

IMPORTANT NOTEFollowing the repair measures, the following checks MUST be carried out using the Diagnosis Assistance System, menu

'Control unit adaptations'

- Flash programming of control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit)

- SCN coding

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Diagnostic cable has short to ground.

- Inspect wiring and connectors at connection points for loose contacts, damage and corrosion. Repair or replace as required.

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Diagnostic cable has open circuit.

- Inspect wiring and connectors at connection points for loose contacts, damage and corrosion. Repair or replace as required.

End of test

NO

The measurement value is not OK.Further causes

- Voltage supply line is not OK.

Press button "F2" for further tests

1.1.3.2.1.13. No further information available.

1.1.3.2.2. Resistance test of engine compartment CAN

Test 1.1.3.2.2.1: Test total resistance of engine compartment CAN.

Test 1.1.3.2.2.2: Test terminating resistor of component X30/5 (Left voltage distributor (CAN) connector).

Test 1.1.3.2.2.3: Test terminating resistor of CAN element in control module N3/10 (ME-SFI [ME] control unit).

1.1.3.2.2.1. Test total resistance of engine compartment CAN.

Test 1.1.3.2.2.1.1: Perform measurement at component X30/5 (Left voltage distributor (CAN) connector).

Test 1.1.3.2.2.1.2: Perform measurement at component N3/10 (ME-SFI [ME] control unit).

1.1.3.2.2.1.1. Perform measurement at component X30/5 (Left voltage distributor (CAN) connector).

Test total resistance of engine compartment CAN.

Figure legend

- X30/5 (Left voltage distributor (CAN) connector)

Test sequence

- Switch off ignition.

- Measurement with multimeter

- (X30/5) 2.Measure resistance with multimeter between pins 2 and 2.1 (X30/5)

Adapter cable no. W220 589 00 99 36 may be used.Specified value

- [55...65]ohms

Question:

- Is the measured value within the specified value range?

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 587

Possible cause:

- Stepless adjustment of exhaust camshaft of left cylinder bank

Affected functions:

- Engine output

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

Test 1: Exhaust camshaft of left cylinder bank

1. Exhaust camshaft of left cylinder bank

Warning!Communication with ECU required.

0740

Continuous camshaft adjustment ( RIGHT ): Incorrect position of the intake camshaft (P0010)

Possible cause:

- Stepless adjustment of intake camshaft of right cylinder bank

Affected functions:

- Engine output

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

Test 1: Intake camshaft of right cylinder bank

1. Intake camshaft of right cylinder bank

Warning!Communication with ECU required.

0744

Continuous camshaft adjustment ( LEFT ): Incorrect position of the intake camshaft (P0020)

Possible cause:

- Stepless adjustment of intake camshaft of left cylinder bank

Affected functions:

- Engine output

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

Test 1: Intake camshaft of left cylinder bank

1. Intake camshaft of left cylinder bank

Warning!Communication with ECU required.

0745

Self-adaptation of mixture formation for enrichment at idle for the right cylinder bank is above the permissible limit. (P0171)

Possible cause:

- Selfadaptation of mixture formation

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 2802

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

End of test

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

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

Test sequence

- Switch off ignition.

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

- Disconnect coupling F at 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[115...125]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 X63/4 (CAN databus adapter connector, 2-pin) to component N3/10 (ME-SFI [ME] control unit)

- Component X63/4 (CAN databus adapter connector, 2-pin)

End of test

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

Test terminating resistor of component N3/10 (ME-SFI [ME] control unit).

Test sequence

- Switch off ignition.

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

- Connector F is plugged in at control unit.

- Unplug the socket F from the wiring harness at the socket box.

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

Specified value

- Resistor[115...125]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

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

End of test

1.3.3. Test with the aid of the measuring system

Test sequence

- Measurement of level voltage of engine CAN buses CAN bus High and CAN bus Low with the universal oscilloscope

- Separating one user from the connector strip X63/4 (CAN databus adapter connector, 2-pin)

- Observe level voltage.

- Plug in connector again at connector strip X63/4 (CAN databus adapter connector, 2-pin).

- 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

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 558

- 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

Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.

Possible cause:

- Y3/8n4 (Fully integrated transmission control (VGS) control unit)

Affected functions:

- Automatic transmission Function

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Test 1: Remedial action if component 'Y3/8n4 (Fully integrated transmission control (VGS) control unit)' is faulty

1. Remedial action if component 'Y3/8n4 (Fully integrated transmission control (VGS) control unit)' is faulty

Test prerequisites

- First of all process all other current fault codes.

POSSIBLE CAUSES

- Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.

Preconditions

- Print out the initial quick test log before processing the fault code 0641.

- Create control unit log.

Important notes before commencing repair measures

- Always use the same diagnostic unit after the repair measure.

Continue with button F2

Sequence

- Data are being read from the old control unit.

Start process with button F2.

1. No further information available.

ME9.7

Misfiring of cylinder 3 : Damages TWC (P0303)

Possible cause:

- Combustion misfirings

Affected functions:

- Engine diagnosis

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Test 1: Combustion misfirings

1. Combustion misfirings