KMS MP25(M)/MA25(M) manual Version 4.2
44
3.2.4.2 Output test
With this test function all final stages can be tested
separately without the engine running. The choice is
between continuous and pulsating testing, except for
the coil test (pulsating only). When the coil outputs
are being tested, the tacho output will also emit a
pulse every 8 ms.
The option enables the injector output to be
tested. A pulsating test lasts 1 minute, during which
the injectors are activated for periods of 10 ms,
alternating with rest periods of 10 ms.
During a continuous test the injectors are
continuously active for 1 minute. The fuel pump is
switched on 10 seconds before the test is started, to
ensure that the system is at operating pressure.
Warning:
When testing the injectors, do not allow the engine to flood ā make sure the
fuel pump is switched off!
3.2.4.3 Crankshaft sensor test
The crankshaft sensor function is used to check
whether the crankshaft position sensor registers
the correct number of teeth. The number of teeth
shown should be 60 for a 60-2 toothed wheel and
36 for a 36-1 version.
If another reading is shown, check whether the
sensor is correctly connected and properly mounted. Electronic interference can occur when the
leads are not properly shielded or positioned close to the coil and spark leads. A sensor taking a
reading from an external cog may have metal particles attached to it as a result of grinding or
drilling. If a failure only starts occurring at higher engine speeds, it is likely that it is caused by
sensor vibrations.
Warning:
Crankshaft position sensors have a highly sensitive core. If the sensor is
dropped, the core may break as a result of which the sensor will give a weak
or incorrect signal.
Electronic interference can occur when the leads are not properly shielded
or positioned close to the coil and spark leads.
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