Yamaha F225F Service Manual page 128

TRBL
SHTG
• 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.
Drop cylinder (#1–#6)
• 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.
Engine speed
Battery voltage
Throttle position sensor
• 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.
Engine speed
Throttle request
Throttle position sensor 1
Throttle position sensor 2
Intake pressure (*1)
Battery voltage
Target TPS voltage (*2)
(*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.
4-3
Troubleshooting
Engine temperature
Intake pressure
Oil pressure
Ref. TPS voltage (*3)
Target TPS voltage for
ISC (*4)
Engine stop mode
Engine start mode
Engine stop mode with SW
Engine stop lanyard
switch (*5)
Main relay (*6)
Throttle request
Shift position sensor
ETV relay
Overheat warning
Low oil pressure (*7)
Engine hour
Trig
Code
Active Remote Control