Manufacturer Code Charts: 143600

The voltage supply of circuit 87 has undervoltage.


Possible cause:

- Supply voltage
Affected functions:

- Power generation

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Test 1: Test voltage supply.

1. Test voltage supply.
Power supply Terminal (87)
Test prerequisite

- The actual value is not o.k.
Test sequence

- Check voltage supply at fuses 21, 22, 23 and 24.
- Measure direct voltage with multimeter between ground socket and socket N10/1f21 (Fuse 21)
- Measure direct voltage with multimeter between ground socket and socket N10/1f22 (Fuse 22)
- Measure direct voltage with multimeter between ground socket and socket N10/1f23 (Fuse 23)
- Measure direct voltage with multimeter between ground socket and socket N10/1f24 (Fuse 24)
- Switch on ignition.
Specified value

- Voltage[11...14] V
Question

- Is the measurement value OK?


YES
The measurement value is OK.Possible cause and remedy

- Inspect fuses, replace if necessary.
- 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 ground connection of component N3/9 (CDI control unit) as per circuit diagram.
End of test

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

- Check component N10/1kC (Circuit 87 relay, engine).
- Test wiring from component N3/9 (CDI control unit) to component N10/1 (Front SAM control unit with fuse and relay module) with an ohmmeter for short circuit (positive or negative) and repair, if necessary.
End of test