Yamaha F225F, Service Manual

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4-3
TRBL
SHTG
Troubleshooting
• Active test
The test can be performed while the engine is running and the gear shift is set to the N position. It
is not possible to perform the test while the boat is moving.
• Data logger
Displays 13 minutes of recorded data for 2 or more of the items stored in the engine ECM. In addi-
tion, the operating time as compared to the engine speed and the total operating time are dis-
played. This enables you to check the operating status of the engine. You can also save the engine
ECM record data to a file so that you can view and display the graph later.
• ECM record data graph
When a malfunction occurs in the ETV system, 4 seconds (2 seconds before and after the mal-
function) of data is recorded in the engine ECM. This data can be displayed in a graph using the
“ECM record data graph” of the YDIS.
When the communication cable is used to connect a computer to the engine ECM, the engine
ECM record data can be saved and viewed on the computer.
The saved engine ECM record data can also be viewed offline.
(*1) Intake air pressure
(*2) This item shows the target output voltage of the TPS.
This value is the control voltage that the engine ECM requires to set the target opening
angle of the throttle valve.
(*3) Reference TPS voltage
This item shows the criterion output voltage of the TPS.
This value is used to detect the TPS output voltage during engine operation.
(*4) Engine ECM controls the engine idle speed using the throttle valve that is connected to the
TPS.
This target voltage is used by the engine ECM to obtain the target opening angle of the
throttle valve at engine idle speed.
(*5) Engine shut-off switch
(*6) Main relay (ignition coil, fuel injector, VCT, engine ECM, low-pressure fuel pump, high-
pressure fuel pump, vapor shut-off valve, YDIS)
(*7) Low engine oil pressure
• Digital Electronic Control system reset
Mutual authentication is performed between Digital Electronic Control ECM and engine ECM.
Drop cylinder (#1–#6)
Engine speed Engine temperature Throttle request
Battery voltage Intake pressure Shift position sensor
Throttle position sensor Oil pressure
Engine speed Ref. TPS voltage (*3) ETV relay
Throttle request
Target TPS voltage for
ISC (*4)
Overheat warning
Throttle position sensor 1 Engine stop mode Low oil pressure (*7)
Throttle position sensor 2 Engine start mode Engine hour
Intake pressure (*1) Engine stop mode with SW Trig
Battery voltage
Engine stop lanyard
switch (*5)
Code
Target TPS voltage (*2) Main relay (*6) Active Remote Control