- 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
1.1.3.2.1.4. 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
1.1.3.2.1.5. 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
