SELVA MARINE Blue Whale 250 EFI, Service Manual

Page: 346 / 377

TRBL
SHTG
Troubleshooting
9-1
6P23H11
YDIS
9
Introduction
Feature
The newly developed YDIS provides quicker detection and analysis of engine malfunctions.
By connecting your computer to the ECM of an outboard motor using the communication cable, this
software can be used to display sensor data and data stored in the ECM on a computer
’ s monitor.
If this software is run on Microsoft Windows
®
95, Windows 98, Windows Me, Windows 2000, or Win-
dows XP, the information can be displayed in colorful graphics. Also, the software can be operated
using either a mouse or a keyboard.
In addition, the data for the main functions (Diagnosis, Diagnosis record, Engine monitor, and Data
logger) can be saved on a disk or printed out.
Function
1. Diagnosis: Displays each part name, and the ECM trouble codes and status when the engine
start switch is turned to ON. This allows you to quickly specify malfunctioning parts. The trouble
codes displayed are the same as those described in
“ Trouble code and checking step ” in this
chapter (9-7).
2. Diagnosis record: Displays each part name and the ECM trouble codes that have been regis-
tered. This allows you to check the outboard motor ’ s record of malfunctions. The trouble codes
displayed are the same as those described in “ Trouble code and checking step ” in this chapter
(9-7).
3. Engine monitor: Each sensor status and the ECM data are displayed while the engine is run-
ning. This enables you to find malfunctioning parts quickly. In addition, the data displayed using
the Engine Monitor function can be displayed in a graph.
Items: For Blue Wlale 250
(*1)
: Intake air pressure
(*2)
: Intake air temperature
(*3)
: Neutral switch
(*4)
: Shift cut switch
(*5)
: Thermoswitch
(*6)
: Engine start switch
(*7)
: Electronic throttle valve relay
(*8)
: High-pressure fuel pump relay
1 Engine speed 10 Fuel injection duration 19 Dual engine system
switch
2 Intake pressure
(*1)
11 Ignition timing 20 Shift cut-off switch
(*4)
3 Throttle position sensor 1 12 Engine temperature 21 Overheat
thermoswitch
(*5)
4 Throttle valve opening
(0
– 90)
13 Intake temperature
(*2)
22 Main switch
(*6)
5 Throttle position sensor 2 14 Oil pressure 23 Main relay
6 Accelerator position
sensor 1 15 Intake cam timing
(STBD) 24 Electronic throttle
relay
(*7)
7 Accelerator position
sensor 2 16 Intake cam timing
(PORT) 25 Fuel pump relay
(*8)
8 Atmospheric pressure 17 Engine stop lanyard
switch
9 Battery voltage (12 – 16) 18 Shift position switch
(*3)