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Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2345

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2345

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

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

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

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2344

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2344

- Cables between component N10/1 (Driver-side SAM control unit with fuse and relay module) and control module A89 (DTR controller unit)

- Plug connection X11/36

1.1.3.2.2.3. Check power supply at control unit N3/10 (ME-SFI [ME] control unit).

Test 1.1.3.2.2.3.1: Test voltage supply of circuit 87. ( Check using actual value )

Test 1.1.3.2.2.3.2: Test voltage supply of circuit 30.

Test 1.1.3.2.2.3.3: Test current consumption of component N10/1kR (Circuit 87 relay, engine).

Test 1.1.3.2.2.3.4: Test voltage supply of circuit 15.

1.1.3.2.2.3.1. 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

NO

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

- Test voltage supply of circuit 30.

- Test voltage supply of circuit 87.

1.1.3.2.2.3.2. 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

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2343

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2343

Figure legend

- A89 (DTR controller unit)

Test prerequisite

- The voltage test at component G1 (Battery) is o.k.

- Fuse 45 in component N10/1 (Driver-side SAM control unit with fuse and relay module) is o.k.

Test sequence

- Switch off ignition.

- Detach coupling at component A89 (DTR controller unit).

- 1.Measure direct voltage with multimeter between sockets 1 and 1.6

- Switch on ignition.

Specified value

- [11.0 ... 14.5] V

Question

- Is the value o.k.?

YES

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..

End of test

NO

The measured value is not within the specified value range.Possible cause and remedy

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2342

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2342

NO

The measurement value is not OK.Possible cause and remedy

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

End of test

1.1.3.2.2. Voltage supply of engine compartment CAN control modules

Test 1.1.3.2.2.1: Check power supply at control unit A1 (Instrument cluster).

Test 1.1.3.2.2.2: Check power supply at control unit A89 (DTR controller unit).

Test 1.1.3.2.2.3: Check power supply at control unit N3/10 (ME-SFI [ME] control unit).

Test 1.1.3.2.2.4: Check power supply at control unit N15/3 (ETC [EGS] control unit).

Test 1.1.3.2.2.5: Check power supply at control unit N15/5 (Electronic selector lever module control unit).

Test 1.1.3.2.2.6: Check power supply at control unit N15/6 (Sprintshift control module).

Test 1.1.3.2.2.7: Check power supply at control unit N47-5 (ESP, SPS [PML] and BAS control unit).

Test 1.1.3.2.2.8: Check power supply at control unit N51 (AIRmatic with ADS control module).

Test 1.1.3.2.2.9: Check power supply at control unit N63/1 (DTR control module).

Test 1.1.3.2.2.10: Check power supply at control unit N71 (Headlamp range adjustment control module).

Test 1.1.3.2.2.11: Check power supply at control unit N73 (EIS [EZS] control unit).

Test 1.1.3.2.2.12: Check power supply at control unit N80 (Steering column module).

Test 1.1.3.2.2.13: Check power supply at control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit).

1.1.3.2.2.1. Check power supply at control unit A1 (Instrument cluster).

Test prerequisites

- The fuses are OK.

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

Test sequence

- Switch off ignition.

- Detach the socket at component A1 (Instrument cluster).

- Measure direct voltage with multimeter between sockets (A1) 1 and (A1) 6

- Measure direct voltage with multimeter between sockets (A1) 2 and (A1) 6

- Measure direct voltage with multimeter between sockets (A1) 3 and (A1) 6

- Switch on ignition.

Specified value

- Voltage [11.0...14.5] V

Question:Is the measurement value OK?

YES

The measurement value is OK.Possible cause and remedy

- Perform inspection of connector and of socket for bent pins and enlarged contacts.

- Control unit A1 (Instrument cluster)

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Line between component A1 (Instrument cluster) and component N10/1 (Front SAM control unit with fuse and relay module)

- Lines between A1 (Instrument cluster) and W28/1 (Ground, left inner door sill)

- Perform inspection of connector and of socket for bent pins and enlarged contacts.

End of test

1.1.3.2.2.2. Check power supply at control unit A89 (DTR controller unit).

Check power supply at control unit A89 (DTR controller unit).

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2341

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2341

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

- 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

1.1.3.2.1.2. 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

Part 2

The engine off time has an implausible value. (P2610)

1.1.3.2.1.3. 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

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2340

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2340

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?

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

- 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

1.1.3.2.1.1.2. 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.

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2339

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2339

1.1.3.1.2. Wiring diagram of CAN bus

Note

- WIS is not available on this system.

- It is not possible to display the requested WIS document [ pe0019p2200da ].

- You can start WIS on another system and display the WIS document by entering the document number [ pe0019p2200da ] in the 'Contents'

field.

1.1.3.1.2. No further information available.

1.1.3.2. Measurements with multimeter on CAN network

Test 1.1.3.2.1: Resistance test of engine compartment CAN

Test 1.1.3.2.2: Voltage supply of engine compartment CAN control modules

1.1.3.2.1. Resistance test of engine compartment CAN

Test 1.1.3.2.1.1: Test total resistance of engine compartment CAN.

Test 1.1.3.2.1.2: Test terminating resistor of component X30/5 (Left voltage distributor (CAN) connector).

Test 1.1.3.2.1.3: Test terminating resistor of CAN element in control module N3/10 (ME-SFI [ME] control unit).

1.1.3.2.1.1. Test total resistance of engine compartment CAN.

Test 1.1.3.2.1.1.1: Perform measurement at component X30/5 (Left voltage distributor (CAN) connector).

Test 1.1.3.2.1.1.2: Perform measurement at component N3/10 (ME-SFI [ME] control unit).

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

Test total resistance of engine compartment CAN.

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2338

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2338

Test 1.1.3.1: Information to engine compartment CAN network

Test 1.1.3.2: Measurements with multimeter on CAN network

Test 1.1.3.3: Test with the aid of the measuring system

Test 1.1.3.4: Display CAN signals with the aid of the special tool 'Star Diagnosis CANtool'.

1.1.3.1. Information to engine compartment CAN network

Test 1.1.3.1.1: Arrangement diagramNOTESome of the control units listed are special equipment and not installed in every vehicle.

Test 1.1.3.1.2: Wiring diagram of CAN bus

1.1.3.1.1. Arrangement diagramNOTESome of the control units listed are special equipment and not installed in every vehicle.

Location diagram (with special equipment)

Figure legend

- A1 (Instrument cluster)

- A89 (DTR controller unit)

- N3/9 (CDI control unit)

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

- N15/3 (ETC [EGS] control unit)

- N15/5 (Electronic selector lever module control unit)

- N47-5 (ESP, SPS [PML] and BAS control unit)

- N51 (AIRmatic with ADS control module)

- N63/1 (DTR control module)

- N71 (Headlamp range adjustment control module)

- N73 (EIS [EZS] control unit)

- N80 (Steering column module)

- N93 (Central gateway control unit)

- N97 (Rear axle level control system control module)

- X11/4 (Diagnosis test connector)

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

- Installation point of plug connection X30/5 (Left voltage distributor (CAN) connector)

- Communication with ECU required

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2337

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2337

- This CAN bus requires external terminating resistors.

- The terminating resistors can be located in control units or voltage distributors depending on the CAN bus.

Legend and description for figure 1CAN-H: CAN bus HighCAN-L: CAN bus LowECU 1 ... n: Control unit 1 ... nCAN terminating resistor (

Example: 120ohms)Legend and description for figure 2U 1: Specification approx. 3,6 voltsU 2: Specification approx. 2,5 voltsU 3: Specification

approx. 1,4 voltsContinue with button F2

1.1.1.3.2. No further information available.

1.1.1.4. Possible aids and their usage

Evaluation of CAN fault codes

- The control units present in the vehicle (actual configuration) are compared with the coding in control unit CGW (specified configuration).

- Filtering and evaluation of all CAN timeout fault codes present in the vehicleThe result of the evaluation leads to the required test steps.

Multimeter

- Aids for voltage and resistance measurement in menu item 'Measurements with multimeter on CAN network'

Measuring system

- Aid for graphic representation of CAN signal and voltage levels

- The specified characteristics shown in Measurement Technology are used to recognize changed CAN voltage levels, which can be caused by

faulty CAN components.

- Possible procedure: Disconnect and then reconnect the CAN bus subscribers at the voltage distributor one at a time.Compare the pass image

with the actual image from the oscilloscope.

Star Diagnosis CANtool

- Aids for representation of actual values and identification of bus wake-up events and bus keepawake events

Continue with button F2

1.1.1.4. No further information available.

1.1.2. Read current CAN configuration and CAN fault codes

Warning!Communication with ECU required.

1.1.3. Further CAN test options

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2336

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2336

Test 1.1.1.3.1: Low-Speed CAN (83,3 kBit/s)

Test 1.1.1.3.2: High-Speed CAN (125 kBit/s , 500 kBit/s)

1.1.1.3.1. 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

1.1.1.3.1. No further information available.

1.1.1.3.2. High-Speed CAN (125 kBit/s , 500 kBit/s)

General CAN fundamentals

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

- 125 kBit/s : Interior CAN busSeries 221

- 125 kBit/s : Telematic CAN busSeries 221

- 500 kBit/s : For example:Drive train CAN bus

- 500 kBit/s : For example:Diagnostic CAN-Bus

- This CAN bus does not permit single-wire mode.

- This means that both CAN lines are always required for fault-free communication between the control units.

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2335

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2335

Test 1: Engine compartment CAN test

Test 2: Check component A1 (Instrument cluster).

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.

Bus OFF fault

- A Bus OFF fault code is set, when the control unit cannot send a certain amount of messages to the CAN bus or the messages are

incomplete.The control unit then switches off for a short time from CAN bus.

- For example:CAN controller: CAN bus OFF

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.

1.1.1.2. No further information available.

1.1.1.3. General CAN fundamentals

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2334

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2334

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.

1.1.3.4.1.8. Steering column module

Warning!Communication with ECU required.

2. Check component A1 (Instrument cluster).

Read and process fault code from control module A1 (Instrument cluster).

Possible cause and remedy

- Read and process fault code from control module A1 (Instrument cluster).

End of test

Part 1

The engine off time has an implausible value. (P2610)

Possible cause:

- A1 (Instrument cluster)

Affected functions:

- CAN Communication

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

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2333

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2333

- 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

- 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 :

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2332

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2332

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

- 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)

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2331

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2331

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

Test 1.1.3.2.2.1.2: Perform measurement at component X30/5 (Left voltage distributor (CAN) connector).

1.1.3.2.2.1.1. 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 X30/5 (Left voltage distributor (CAN) connector)

- 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

1.1.3.2.2.1.2. 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?

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2330

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 2330

YES

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.

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