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Home >> Mercedes Benz >> 2012 >> C 300 4MATIC (204.081) V6-3.0L (272.948) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> E2137 >> Part 2

Part 2


A/C compressor2 : CAN transmission error of signal from component AC compressor ( Toggle error / Parity error )








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

Test 1.1.3.2.1.2.1: Guided test

1.1.3.2.1.2.1. 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.


1.1.3.2.1.3. 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

1.1.3.2.1.4. 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.
- Switch on ignition.
Specified value

- Voltage[11.0...14.5] V
Question

- Are the measurement values OK?







YES
Test voltage supply of circuit 87.
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 (A.30) 30 and (A.29) 29 of the 126-pole socket box tester.
- Switch on ignition.
Specified value

- Voltage[11.0...14.5] 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

- 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







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

Test 1.1.3.2.1.5.1: Test voltage of terminal 87 at control unit N47-5 (ESP, SPS [PML] and BAS control unit).

Test 1.1.3.2.1.5.2: Test of cable for voltage supply

Test 1.1.3.2.1.5.3: Test procedure ground cable

1.1.3.2.1.5.1. 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?


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 N47-5 (ESP, SPS [PML] and BAS control unit)
- N10/1f47 (Fuse 47)
End of test

1.1.3.2.1.5.2. 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 (2.14) 48 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 N47-5 (ESP, SPS [PML] and BAS control unit)
- N10/1f47 (Fuse 47)
End of test

1.1.3.2.1.5.3. Test procedure ground cable
Test prerequisite

- Battery voltage is OK.
Test sequence

- Switch off ignition.
- Connect socket box.

- WMeasure resistance with multimeter between 9 and (2.23) 57 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
- W9 (Ground (at front left headlamp unit))
End of test

1.1.3.2.1.6. Check power supply at control unit N51 (AIRmatic with ADS control module).

Test 1.1.3.2.1.6.1: Test voltage supply of circuit 30.

Test 1.1.3.2.1.6.2: Test voltage supply of circuit 87.

1.1.3.2.1.6.1. Test voltage supply of circuit 30.

Test 1.1.3.2.1.6.1.1: Test voltage of terminal 30 at control unit N51 (AIRmatic with ADS control module).

Test 1.1.3.2.1.6.1.2: Test of cable for voltage supply

Test 1.1.3.2.1.6.1.3: Test procedure ground cable

1.1.3.2.1.6.1.1. 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.


1.1.3.2.1.6.1.2. 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 (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

1.1.3.2.1.6.1.3. 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

1.1.3.2.1.6.2. Test voltage supply of circuit 87.

Test 1.1.3.2.1.6.2.1: Test voltage of terminal 87 at control unit N51 (AIRmatic with ADS control module).

Test 1.1.3.2.1.6.2.2: Test of cable for voltage supply

Test 1.1.3.2.1.6.2.3: Test procedure ground cable

1.1.3.2.1.6.2.1. Test voltage of terminal 87 at control unit N51 (AIRmatic with ADS 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 (2.21) 55 and (2.43) 77 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.


1.1.3.2.1.6.2.2. 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 (2.43) 77 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)
- N10/1f45 (Fuse 45)
End of test

1.1.3.2.1.6.2.3. 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
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