108
ENGINE MANAGEMENT MODULE (EMM)
EMM DIAGNOSTICS
Oil Injector
Use the diagnostic software to test the oil injection
pump. Make sure the pump is wired correctly. If
the pump activates, the EMM and oil injection cir-
cuit are not at fault. If the oil injection pump does
not run during the static test, check voltage and
continuity of pump circuit. Refer to OILING SYS-
TEM TESTS on p. 218. The resistance of the oil
injection pump winding is approximately 22 Ω.
Fuel Pump
Use the diagnostic software to test the fuel pump.
Make sure the pump is wired correctly. If the
pump activates, the EMM and fuel pump circuit
are not at fault. If the pump does not run during
the static test, check voltage and continuity of
pump circuit. Refer to Circulation Pump Resis-
tance Test on p. 187.
Overheat
This test is used to simulate an overheat situation
and is used to check the “ENG TEMP” or “HOT”
circuit of the SystemCheck gauge.
Check Engine
This test is used to check the “CHECK ENGINE”
circuit of the SystemCheck gauge.
Tachometer
This test is used to check operation of the tachom-
eter circuit.
Dynamic Tests
Dynamic tests are performed with the outboard
running.
Fuel Test
The Fuel Test is performed with the outboard run-
ning (600 RPM minimum). This test momentarily
disables one fuel injector circuit. By dropping one
cylinder, RPM and running quality changes can be
observed. Refer to the diagnostic software User’s
Guide and Dynamic Tests on p. 120.
Ignition Test
The Ignition Test is performed with the outboard
running (600 RPM minimum). This test momen-
tarily disables the ignition circuit and fuel injection
circuit to one cylinder. By dropping one cylinder,
RPM and running quality changes can be
observed. Refer to the diagnostic software User’s
Guide and Dynamic Tests on p. 120.
Prime Oil
This test is used to cycle the oil injection pump for
priming the oiling system. Perform this test with
outboard running to activate oil injection pump.
Dynamic Tests Screen 005137
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