SELVA MARINE Blue Whale 250 EFI, Service Manual

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TRBL
SHTG
Troubleshooting
9-3
6P23H11
6. ECM record data graph: When a malfunction occurs in the electronic throttle valve system, 4
seconds (2 seconds before and after the malfunction) of recorded data are saved in the ECM.
This data can be displayed on a graph using the
“ ECM record data graph ” of the Data logger
function.
When the communication cable is used to connect a computer to the ECM, the ECM record
data can be saved and viewed on the computer.
The saved ECM record data can also be viewed offline.
Items: For Blue Wlale 250
(*1)
: Intake air pressure
(*2)
: Target TPS voltage
This item shows the target output voltage of the TPS.
This value is the control voltage that the 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)
: Reference accelerator position sensor voltage
This item shows the criterion output voltage of the accelerator position sensor.
This value is used to detect the accelerator position sensor output voltage when the remote control
throttle lever is opened.
(*5)
: Target TPS voltage for Idle Speed Control
ECM controls the engine idle speed by using the throttle valve attached to the TPS.
This target voltage is used by the ECM to achieve the target opening angle of the throttle valve at the
engine idle speed.
(*6)
: Engine stop mode with switch
(*7)
: Electronic throttle valve relay
NOTE:
To display the displays and graphs, see the YDIS (version 1.23a or later) Instruction Manual.
1 Engine speed 8 Target TPS voltage
(*2)
15 Engine stop lanyard
switch
2 Accelerator position
sensor 1 9 Ref. TPS voltage
(*3)
16 Main relay
3 Accelerator position
sensor 2 10 Ref. acc. pos. sensor
voltage
(*4)
17 Electronic throttle
relay
(*7)
4 Throttle position sensor
1 11 Target TPS voltage for
ISC
(*5)
18 Overheat warning
5 Throttle position sensor 2 12 Engine stop mode 19 Low oil pressure
6 Intake pressure
(*1)
13 Engine start mode
7 Battery voltage 14 Engine stop mode with
SW
(*6)