TOHATSU MD 30B2 Service Manual page 328

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Troubleshooting
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2. Self-Diagnosis Function of TLDI
The self-diagnosis function detects a trouble(s) of electrical system of TLDI engine and displays the part by using ECU
installed in the engine. TLDI engine requires no instruments and special equipment such as personal computer when
executing the self-diagnosis function that uses key switch operation, tachometer's RPM indication and a combination of
three warning lamps to show information necessary for troubleshooting through the following four modes.
The self-diagnosis function of TLDI engine consists of the
following four modes.
Mode 1......Tachometer operation test
Mode 2......Display of engine operation hours
Mode 3......Display of fault location and fault history
Mode 4......Deletion of fault history
1) Terms related to self-diagnosis function
Key Switch
Key switch is on the remote control box, switch box or switch
panel.
The key positions include the following four positions; "OFF",
"ON", "START" and push-in position when it is at "ON".
The self-diagnosis function is enabled when the key is at "ON".
Warning Lamp
The warning lamp is mounted on the tachometer or switch box to
indicate abnormality of cooling water temperature, oil level and
battery in case it occurred.
In case of electrical part trouble or abnormality, three lamps blink
at the same time to inform of the trouble.
Indications List.)
The self-diagnosis function uses combinations of these three
lamps and tachometer indication to inform of the type of trouble
occurred. (Refer to Trouble Indication List.)
Warning Buzzer
The warning buzzer is built in the remote control box, tiller handle
switch box or switch panel.
The buzzer uses one of the following four operation patterns to
inform of a trouble.
Beep...Two seconds
Beep...0.3 second
Beep, Beep, Beep...Three times in every two minutes
Continuous sounding
Trouble History
The function stores the history of the troubles or abnormalities
that occurred and then recovered in the memory of ECU.
The function allows confirmation of the trouble history.
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(Refer to Warning
TLD D30/40/50B2 2013