Part 1
No or incorrect CAN message from control unit N47-5 (ESP control unit) (P0600)
Test 1: Engine compartment CAN test
1. Engine compartment CAN test
Test 1.1: Check CAN bus.
1.1. Check CAN bus.
Test 1.1.1: Read fault memories of all engine compartment CAN control modules and delete if necessary. - Quick test
Test 1.1.2: Engine compartment CAN test
1.1.1. Read fault memories of all engine compartment CAN control modules and delete if necessary. - Quick test
Engine compartment CAN test
Note
- Before the CAN test it is good practice to erase the fault memory of all the control modules connected to the engine compartment CAN in order to remove any sporadic faults or faults which are no longer current.
Test prerequisites
- Ignition has been switched on for at least 10 s.
Test sequence
- Perform quick test or continue with key F4.
- Test of voltage supply of the engine compartment CAN control modules.
- Test connectors and wiring for CAN of engine compartment CAN control modules.
Question
- Do you wish to perform the quick test?
YES
Warning!Communication with ECU required.
NO
Test 1.1.1.1: Check CAN bus. ( General test information )
Test 1.1.1.2: Resistance test of engine compartment CAN
Test 1.1.1.3: Voltage supply of engine compartment CAN control modules
1.1.1.1. Check CAN bus. ( General test information )
If several fault codes regarding CAN communication have occurred, the following causes of the fault are likely
- Open circuit in voltage supply to the control modules involved
- Short circuit or open circuit of CAN wires
- Connector sleeves of the CAN bus
If CAN communication between control module ME-SFI 2.7.1 and at least one other control module is fault-free, there is no fault at the CAN element of the control module ME-SFI 2.7.1.In this case proceed as follows:
- Read fault memory of control module to which there is a fault in the communication.If a CAN fault regarding communication with control module ME-SFI 2.7.1 is present in this control module, then first of all test CAN lines between the two control modules.
1.1.1.1. No further information available.
1.1.1.2. Resistance test of engine compartment CAN
Test 1.1.1.2.1: Test total resistance of engine compartment CAN.
Test 1.1.1.2.2: Test terminating resistor of component X30/5 (Left voltage distributor (CAN) connector).
Test 1.1.1.2.3: Test terminating resistor of CAN element in control module ME-SFI 2.7.1.
1.1.1.2.1. Test total resistance of engine compartment CAN.
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 (4.11) 96 and (4.1) 86 of the 126-pole socket box tester.
Specified value
- Resistor[55...65]ohms
Question
- Is the measurement value OK?
YES
The measurement value is OK.Further possible causes of fault
- Fault in control unit EZS: Read out fault memory of control unit N73 (EIS [EZS] control unit).
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).
1.1.1.2.2. 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 4 at component N3/10 (ME-SFI [ME] control unit).
- Measure resistance with multimeter between sockets (4.11) 96 and (4.1) 86 of the 126-pole socket box tester.
Specified value
- Resistor[115...125]ohms
Question
- Is the measurement value OK?
YES
The measurement value is OK.Further possible causes of fault
- Fault in control unit EZS: Read out fault memory of control unit N73 (EIS [EZS] control unit).
- Read out fault memory of control unit N93 (Central gateway control unit).
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
1.1.1.2.3. Test terminating resistor of CAN element in control module ME-SFI 2.7.1.
Test terminating resistor of component ME-SFI 2.8.
Test sequence
- Switch off ignition.
- Connect socket box to component N3/10 (ME-SFI [ME] control unit).
- Connector 4 is plugged in at control unit.
- Unplug the socket 4 from the wiring harness at the socket box.
- Measure resistance with multimeter between sockets (4.11) 96 and (4.1) 86 of the 126-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
1.1.1.3. Voltage supply of engine compartment CAN control modules
Test 1.1.1.3.1: EZS - Electronic ignition switch
Test 1.1.1.3.2: IC - Instrument cluster
Test 1.1.1.3.3: SCM [MRM] - Steering column module
Test 1.1.1.3.4: ETC - Electronic transmission control
Test 1.1.1.3.5: ESM - Electronic selector module
Test 1.1.1.3.6: ME-SFI 2.7.1 - Motor electronics 2.7.1
Test 1.1.1.3.7: ESP - Electronic stability program
Test 1.1.1.3.8: DTR - Distronic
Test 1.1.1.3.9: AIRmatic
Test 1.1.1.3.10: SBC
Test 1.1.1.3.11: SGR - Radar sensors control unit
Test 1.1.1.3.12: TPC - Tire pressure monitor
Test 1.1.1.3.13: N118 (Fuel pump control module)
Test 1.1.1.3.14: HRA - Headlamp range adjustment
1.1.1.3.1. EZS - Electronic ignition switch
Test prerequisite
- Battery voltage is OK.
- The fuses are OK.
Status of relevant actual value:
- Power supply:Warning! Communication with ECU required.
Specified value:
- Power supply [11.0...14.5] V
Question
- Is the actual value o.k.?
YES
The actual value is okay.Possible cause and remedy
- 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..
- Check alternator.
End of test
NO
The actual value is not o.k.Test sequence
- Switch off ignition.
- Detach sockets A and C at component N73 (EIS [EZS] control unit).
- Measure direct voltage with multimeter between sockets (N73) B.2 and (N73) C.1
Specified value:
- Voltage [11.0...14.5] V
Question
- Are the measurement values OK?
YES
The measurement values are OK.Possible cause and remedy
- Inspect connector B,C at control unit N73 (EIS [EZS] control unit) for damage, correct connection, loose contact and corrosion and repair, if necessary.
- N73 (EIS [EZS] control unit)
End of test
NO
The measurement values are not OK.Possible cause and remedy
- Line between component N73 (EIS [EZS] control unit) and component N10/1 (Driver-side SAM control unit with fuse and relay module)
- Line between component N73 (EIS [EZS] control unit) and component Z6 (Ground connector sleeve)
- N10/1 (Driver-side SAM control unit with fuse and relay module)
- Z6 (Ground connector sleeve)
End of test
1.1.1.3.2. IC - Instrument cluster
Test prerequisites
- Fuse N10/1f64 (Fuse 64) is OK.
Test sequence
- Switch off ignition.
- Detach coupling at component A1 (Instrument cluster).
- Measure direct voltage with multimeter between sockets (A1) 1 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
- 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 (Driver-side SAM control unit with fuse and relay module)
- Lines between A1 (Instrument cluster) and W15/2 (Ground, left footwell)
End of test
1.1.1.3.3. SCM [MRM] - Steering column module
Warning!Communication with ECU required.
1.1.1.3.4. ETC - Electronic transmission control
Warning!Communication with ECU required.
1.1.1.3.5. ESM - Electronic selector module
Warning!Communication with ECU required.
1.1.1.3.6. ME-SFI 2.7.1 - Motor electronics 2.7.1
Warning!Communication with ECU required.
1.1.1.3.7. ESP - Electronic stability program
Warning!Communication with ECU required.
1.1.1.3.8. DTR - Distronic
Test 1.1.1.3.8.1: Check power supply of component N63/1 (DTR control module).
Test 1.1.1.3.8.2: Check power supply of component A89 (DTR controller unit).
1.1.1.3.8.1. Check power supply of component N63/1 (DTR control module).
Check power supply at control unit N63/1 (DTR control module).
Test sequence
- Switch off ignition.
- Disconnect coupling 2 at component N63/1 (DTR control module).
- Measure direct voltage with multimeter between sockets (N63/1) 2.8 and (N63/1) 2.4
- 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
- F1/1f36 (fuse 36)7.5 A
- Cable for voltage supply
1.1.1.3.8.2. Check power supply of component A89 (DTR controller unit).
Check power supply at control unit A89 (DTR controller unit).
Figure legend
- A89 (DTR controller unit)
Test prerequisite
- The voltage test at component G1 (Battery) is o.k.
- Fuse 46 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
- Cables between component N10/1 (Driver-side SAM control unit with fuse and relay module) and control module A89 (DTR controller unit)
1.1.1.3.9. AIRmatic
Test 1.1.1.3.9.1: Test voltage of terminal 30 at control unit N51 (AIRmatic with ADS control module).
Test 1.1.1.3.9.2: Test of cable for voltage supply
Test 1.1.1.3.9.3: Test procedure ground cable
1.1.1.3.9.1. Test voltage of terminal 30 at control unit N51 (AIRmatic with ADS control module).
Test prerequisite
- Battery voltage is OK.
Status of the relevant actual values:
- Terminal 30:Warning! Communication with ECU required.
Test sequence
- Switch off ignition.
- Connect socket box.
- Switch on ignition.
- Measure direct voltage with multimeter between sockets (2.21) 55 and (2.47) 81 of the 126-pole socket box tester.
Specified value
- [11...14 V]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The actual value is not o.k.Note
- This test did not produce any clear result.
- Select further tests.
1.1.1.3.9.2. 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 (2.47) 81 of the 126-pole socket box tester.
Specified value
- [11...14 V]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Lines to component N51 (AIRmatic with ADS control module)
- F34f37 (Fuse 37)
End of test
1.1.1.3.9.3. Test procedure ground cable
Test prerequisite
- Battery voltage is OK.
Test sequence
- Switch off ignition.
- Connect socket box.
- W15/Measure resistance with multimeter between 1 and (2.21) 55 of the 35-pole socket box tester.
Specified value
- [<1ohms ]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Ground cable
- W15/1 (Ground (right footwell))
End of test
1.1.1.3.10. SBC
Test 1.1.1.3.10.1: Check power supply of component Left SBC.
Test 1.1.1.3.10.2: Check power supply of component Right SBC.
1.1.1.3.10.1. Check power supply of component Left SBC.
Test 1.1.1.3.10.1.1: Test voltage of terminal 87 at control unit A7/3 (SBC left hydraulic unit).
Test 1.1.1.3.10.1.2: Test of cable for voltage supply
Test 1.1.1.3.10.1.3: Test procedure ground cable
1.1.1.3.10.1.1. Test voltage of terminal 87 at control unit A7/3 (SBC left hydraulic 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 (1.44) 44 and (1.42) 42 of the 126-pole socket box tester.
Specified value
- [11...14 V]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Lines to component A7/3n1 (SBC left control module)
- N10/1f47 (Fuse 47)
End of test
1.1.1.3.10.1.2. 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 (1.42) 42 of the 126-pole socket box tester.
Specified value
- [11...14 V]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Lines to component A7/3 (SBC left hydraulic unit)
- N10/1f47 (Fuse 47)
End of test
1.1.1.3.10.1.3. Test procedure ground cable
Test prerequisite
- Battery voltage is OK.
Test sequence
- Switch off ignition.
- Connect socket box.
- W14/Measure resistance with multimeter between 2 and (1.44) 44 of the 35-pole socket box tester.
Specified value
- [<1ohms ]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Ground cable
- W14/2 (Left SBC ground)
End of test
1.1.1.3.10.2. Check power supply of component Right SBC.
Test 1.1.1.3.10.2.1: Test voltage of terminal 87 at control unit A7/4n1 (SBC right control module).
Test 1.1.1.3.10.2.2: Test of cable for voltage supply
Test 1.1.1.3.10.2.3: Test procedure ground cable
1.1.1.3.10.2.1. Test voltage of terminal 87 at control unit A7/4n1 (SBC right control module).
Test prerequisite
- Battery voltage is OK.
Test sequence
- Switch off ignition.
- Connect socket box.
- Switch on ignition.
- Measure direct voltage with multimeter between sockets (1.44) 44 and (1.42) 42 of the 126-pole socket box tester.
Specified value
- [11...14 V]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Lines to component A7/4n1 (SBC right control module)
- N10/1f47 (Fuse 47)
End of test
1.1.1.3.10.2.2. 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 (1.42) 42 of the 126-pole socket box tester.
Specified value
- [11...14 V]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Lines to component A7/4n1 (SBC right control module)
- N10/1f47 (Fuse 47)
End of test
1.1.1.3.10.2.3. Test procedure ground cable
Test prerequisite
- Battery voltage is OK.
Test sequence
- Switch off ignition.
- Connect socket box.
- W14/Measure resistance with multimeter between 2 and (1.44) 44 of the 35-pole socket box tester.
Specified value
- [<1ohms ]
Question
- Is the measurement value OK?
YES
The measurement value is 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..
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Ground cable
- W14/2 (Left SBC ground)
End of test
1.1.1.3.11. SGR - Radar sensors control unit
Test voltage supply of circuit 87.
Test prerequisite
- Battery voltage is OK.
- Fuse N10/1f46 (Fuse 46) in component N10/1 (Driver-side SAM control unit with fuse and relay module) is o.k.
Status of relevant actual value:
- Voltage supply terminal 15:Warning! Communication with ECU required.
Test sequence
- Switch off ignition.
- Separate plug connection A at control unit N62/1 (Radar sensors control unit (SGR)).
- Measure direct voltage with multimeter between sockets (N62/1) A.16 and (N62/1) A.1
Specified value
- Voltage[11.0 ... 14.5] V
Question
- Is the measurement value OK?
YES
Test voltage supply of circuit 87.
Test prerequisite
- Fuse N10/1f46 (Fuse 46) in component N10/1 (Driver-side SAM control unit with fuse and relay module) is o.k.
Status of relevant actual value:
- Voltage supply terminal 15:Warning! Communication with ECU required.
Test sequence
- Switch on ignition.
- Measure direct voltage with multimeter between sockets (N62/1) A.16 and (N62/1) A.5
Specified value
- Voltage[11.0 ... 14.5] V
Question
- Is the measurement value OK?
YES
The measurement value is OK.Possible cause and remedy
- 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 measurement value is not OK.Possible cause and remedy
- Check line from N62/1 (Radar sensors control unit (SGR)) to N10/1 (Driver-side SAM control unit with fuse and relay module) for Short circuit or open circuit.
- Check line from N62/1 (Radar sensors control unit (SGR)) to W15/2 (Ground, left footwell) for Open circuit.
- Check control unit N10/1 (Driver-side SAM control unit with fuse and relay module).
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Check line from N62/1 (Radar sensors control unit (SGR)) to N10/1 (Driver-side SAM control unit with fuse and relay module) for Short circuit or open circuit.
- Check line from N62/1 (Radar sensors control unit (SGR)) to W15/2 (Ground, left footwell) for Open circuit.
- Check control unit N10/1 (Driver-side SAM control unit with fuse and relay module).
End of test
1.1.1.3.12. TPC - Tire pressure monitor
Operation number of operation texts and work units or standard texts and flat rates:40-0641Test prerequisite
- Battery voltage is OK.
Test sequence
- Switch off ignition.
- Disconnect connector at component N88 (TPM [RDK] control unit).
- [A.16] Measure direct voltage with multimeter between 16 and 15 [A.15]
Specified value
- Voltage[11.0...14.5] V
Question
- Is the measurement value OK?
YES
The measurement value is OK.Possible cause and remedy
- Inspect cables, electrical connections and plug connections for damage, correct connection, loose contact and corrosion, and repair or replace if necessary.
- Replace component N88 (TPM [RDK] control unit).
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Check fuse f2 (voltage supply from control unit N88 (TPM [RDK] control unit)) in component N10/3 (SAM control module with fuse and relay module rear-end 1).
- Check lines from component N88 (TPM [RDK] control unit) to component N10/3 (SAM control module with fuse and relay module rear-end 1).
End of test