[4] Check system 'Starter control'.: Signal line is interrupted.

[4] Check system 'Starter control'.: Signal line is interrupted.

Test 1: Test starter control.

1. Test starter control.

Test 1.1: Actual value: Terminal (50)

Test 1.2: Power supply Terminal (50)

Test 1.3: Test signal cable to component N10/1 (Front SAM control unit with fuse and relay module).

1.1. Actual value: Terminal (50)
Test prerequisite

- Start engine.
Status of relevant actual value:
- Terminal 50 (input):Warning!

- Terminal 50 (output, starter actuation):Warning! Communication with ECU required.
Set/actual value comparison

- ON
- ON
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..
- Replace component N10/1 (Front SAM control unit with fuse and relay module).
End of test

NO
The actual value is not o.k.Possible cause and remedy

- Power supplyCheck terminal (87).


1.2. Power supply Terminal (50)
Test prerequisite

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

- Ignition: OFF
- Connect 35-pole socket box at engine wiring harness.
- Measure direct voltage with multimeter between ground and socket (F.58) 28 of the 35-pole socket box tester.
- Ignition ON
Specified value

- Voltage[11...14] V
Question

- Is the measurement value OK?


YES
The measurement value is OK.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..
- Replace control unit N3/9 (CDI control unit).
End of test

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

- Inspect cable and plug connections between N3/9 (CDI control unit) and N10/1 (Signal acquisition and actuation module (SAM) driver side) for Open circuit, repair or replace if necessary.
End of test

1.3. Test signal cable to component N10/1 (Front SAM control unit with fuse and relay module).
Test sequence

- Ignition: OFF
- Connect 35-pole socket box at engine wiring harness.
- Measure resistance with multimeter between socket (F.58) 28 of the 35-pole socket box tester and socket [N10/1] I 9.5
Specified value

- Resistance < 1 Ohm?
Question

- Is the measurement value OK?


YES
The measurement value is not OK.Possible cause and remedy

- Test cable.
End of test

NO
The measurement value is OK.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..
- Replace component N10/1kS (Starter relay).
End of test