- Lines to component N47-5 (ESP, SPS [PML] and BAS control unit)
- N10/1f47 (Fuse 47)
End of test
2.1.3.2.1.7.3. 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
Part 2
No CAN message was received from control unit N93 (Central gateway control unit).
2.1.3.2.1.8. Check power supply at control unit N51 (AIRmatic with ADS control module).
Test 2.1.3.2.1.8.1: Test voltage supply of circuit 30.
Test 2.1.3.2.1.8.2: Test voltage supply of circuit 87.
2.1.3.2.1.8.1. Test voltage supply of circuit 30.
Test 2.1.3.2.1.8.1.1: Test voltage of terminal 30 at control unit N51 (AIRmatic with ADS control module).
Test 2.1.3.2.1.8.1.2: Test of cable for voltage supply
Test 2.1.3.2.1.8.1.3: Test procedure ground cable
2.1.3.2.1.8.1.1. 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.
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