Part 1

Physical fill level fault: upper limit exceeded (tank 2)

Possible cause:

- A1 (Instrument cluster)
Affected functions:

- CAN Communication

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

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: Further CAN test options

Test 1.1.2: Procedure in case of CAN faults

Test 1.1.3: Read current CAN configuration and CAN fault codes

1.1.1. Further CAN test options

Test 1.1.1.1: Information to engine compartment CAN network

Test 1.1.1.2: Measurements with multimeter on CAN network

Test 1.1.1.3: Test with the aid of the measuring system

Test 1.1.1.4: Display CAN signals with the aid of the special tool 'Star Diagnosis CANtool'.

1.1.1.1. Information to engine compartment CAN network

Test 1.1.1.1.1: Arrangement diagramNOTESome of the control units listed are special equipment and not installed in every vehicle.

Test 1.1.1.1.2: Wiring diagram of CAN bus

1.1.1.1.1. 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

1.1.1.1.2. 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.

1.1.1.1.2. No further information available.

1.1.1.2. Measurements with multimeter on CAN network

Test 1.1.1.2.1: Voltage supply of engine compartment CAN control modules

Test 1.1.1.2.2: Resistance test of engine compartment CAN

1.1.1.2.1. Voltage supply of engine compartment CAN control modules

Test 1.1.1.2.1.1: Check power supply at control unit N71 (Headlamp range adjustment control module).

Test 1.1.1.2.1.2: Check power supply at control unit N73 (EIS [EZS] control unit).

Test 1.1.1.2.1.3: Check power supply at control unit N80 (Steering column module).

Test 1.1.1.2.1.4: Check power supply at control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit).

Test 1.1.1.2.1.5: Check power supply at control unit A1 (Instrument cluster).

Test 1.1.1.2.1.6: Check power supply at control unit A89 (DTR controller unit).

Test 1.1.1.2.1.7: Check power supply at control unit N3/10 (ME-SFI [ME] control unit).

Test 1.1.1.2.1.8: Check power supply at control unit N15/3 (ETC [EGS] control unit).

Test 1.1.1.2.1.9: Check power supply at control unit N15/5 (Electronic selector lever module control unit).

Test 1.1.1.2.1.10: Check power supply at control unit N15/6 (Sprintshift control module).

Test 1.1.1.2.1.11: Check power supply at control unit N47-5 (ESP, SPS [PML] and BAS control unit).

Test 1.1.1.2.1.12: Check power supply at control unit N51 (AIRmatic with ADS control module).

Test 1.1.1.2.1.13: Check power supply at control unit N63/1 (DTR control module).

1.1.1.2.1.1. Check power supply at control unit N71 (Headlamp range adjustment control module).
If the fault code is not current, it may be deleted. In this case, the battery voltage was too low over an extended period.Charge the battery, if necessary.Question:Is there a current undervoltage fault is several control modules?Note:This fault could result in consequential faults. You should therefore process this fault first and then erase the fault memory.

YES
Possible cause and remedy

- Battery voltage too low.Test battery.Charge battery, replace if necessary.
- If fault occurs again:Check alternator.Communication with ECU required
- The quiescent current is too high.Test quiescent current.

NO
Figure legend 1:N71 (Headlamp range adjustment control module)Figure legend 2:N10/1 (Driver-side SAM control unit with fuse and relay module)Test prerequisite

- The relevant actual value is not okay.
- Battery voltage is OK.
- Fuse N10/1f52 (Fuse 52) is OK.
Test sequence

- Switch off ignition.
- Disconnect connector at component N71 (Headlamp range adjustment control module).
- Measure direct voltage with multimeter between sockets (N71) 20 and (N71) 19
- Switch on ignition.
Specified value:Voltage = [11.0...14.5] VQuestion

- Is the measurement value OK?

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)
End of test

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)
End of test

1.1.1.2.1.2. Check power supply at control unit N73 (EIS [EZS] control unit).
Test prerequisite

- Battery voltage is OK.
- Fuse F34f29 (Fuse 29) is 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

- Check lines between components N73 (EIS [EZS] control unit) and N10/1 (Driver-side SAM control unit with fuse and relay module) and repair or replace if necessary.
- Fuse and component F34 (Interior fuse box)
Continue with button F2

Possible cause and remedy

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

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

1.1.1.2.1.2. No further information available.

1.1.1.2.1.3. Check power supply at control unit N80 (Steering column module).
Manual check of supply voltage
Test prerequisite

- The fuses are OK.
- One of the fault codes 9010/9011 is present, or the associated actual value is not OK.
Test sequence

- Remove component N80 (Steering column module).
- Disconnect connector A at component N80 (Steering column module).
- Switch on ignition.
- Measure direct voltage with multimeter between sockets [N80] A.8 and [N80] A.9
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 connector A at control unit N80 (Steering column module) for damage, correct connection, loose contact and corrosion and repair, if necessary.
- Otherwise select further tests.
End of test

NO
The measurement value is not OK.Possible cause and remedy

- Line between component N80 (Steering column module) and component N10/1 (Driver-side SAM control unit with fuse and relay module)
- Z7/58 (Circuit 30 connector sleeve)
- Line between component N80 (Steering column module) and component W15/1 (Ground (right footwell))
- Z6 (Ground connector sleeve)
- N10/1 (Driver-side SAM control unit with fuse and relay module)
End of test

1.1.1.2.1.4. Check power supply at control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit).
Operation number of operation texts and work units or standard texts and flat rates:27-0641Test 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.
Test sequence

- Switch off ignition.
- Separate plug connection at transmission.
- Measure voltage in transmission wiring harness using a multimeter.
- Switch on ignition.
Measure direct voltage with multimeter between 5 and 4Specified value

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

- Is the measurement value OK?

YES
The measurement value is OK.Further causes

- The diagnosis line is not OK
- Perform test on diagnosis line.
Press button "F2" for further tests

Test K cable to control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit).
Operation number of operation texts and work units or standard texts and flat rates:27-0641Test prerequisite

- The power supply of component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is OK.
Test sequence

- Switch on ignition.
- Test voltage at component X11/4 (Diagnosis test connector).
- If several control modules are connected to a K-wire, the voltage can be measured even if an open circuit exists.
Measure direct voltage with multimeter between (X11/4) 11 and (-) ground.Specified value

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

- Is the measurement value OK?

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?

YES
Further image can be displayed with key F7.X11/4 (Diagnosis test connector)Test sequence

- Switch off ignition.
- Separate plug connection at transmission.
- Measure voltage in transmission wiring harness using a multimeter.

- Measure resistance with multimeter between 3 and 11 (X11/4)
Specified value

- Resistance measured: [< 0,6] ohms
Question

- Is the measurement value OK?

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

1.1.1.2.1.4. No further information available.

1.1.1.2.1.5. 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

1.1.1.2.1.6. Check power supply at control unit 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 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

- 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

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

Test 1.1.1.2.1.7.1: Test voltage supply of circuit 87. ( Check using actual value )

Test 1.1.1.2.1.7.2: Test voltage supply of circuit 30.

Test 1.1.1.2.1.7.3: Test current consumption of component N10/1kR (Circuit 87 relay, engine).

Test 1.1.1.2.1.7.4: Test voltage supply of circuit 15.

1.1.1.2.1.7.1. 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.

1.1.1.2.1.7.2. 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

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

1.1.1.2.1.7.3. 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).
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

1.1.1.2.1.7.4. Test voltage supply of circuit 15.
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 voltage supply of circuit 15.
Test sequence

- Measure direct voltage with multimeter between sockets [ F.2 ] 98 and [ F.15 ] 111 of the 35-pole socket box tester.
- Switch on ignition.
Specified value

- Voltage[11.0...15.0] V
Question

- Is the measurement value OK?

YES
The measurement value is OK.End of test

NO
The measurement value is not OK.Possible cause and remedy

- N10/1f52 (Fuse 52)
- Lines
End of test