SELVA MARINE Blue Whale 250 EFI Service Manual page 348

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SHTG
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 Engine speed
2 Accelerator position
sensor 1
3 Accelerator position
sensor 2
4 Throttle position sensor
1
5 Throttle position sensor 2 12 Engine stop mode
6 Intake pressure
7 Battery voltage
(*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.
9-3
Troubleshooting
8 Target TPS voltage
9 Ref. TPS voltage
10 Ref. acc. pos. sensor
voltage
11 Target TPS voltage for
ISC
(*1)
13 Engine start mode
14 Engine stop mode with
SW
(*2)
(*3)
(*4)
(*5)
(*6)
15 Engine stop lanyard
switch
16 Main relay
17 Electronic throttle
(*7)
relay
18 Overheat warning
19 Low oil pressure
6P23H11