Self-Diagnosis; Diagnosing The Electronic Control System - Yamaha F50F Service Manual

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Self-diagnosis

Diagnosing the electronic control
system
1. Connect the special service tool to the
outboard motor as shown.
L/W
NOTE:
When performing this diagnosis, all of the
electrical wires must be properly connected.
Diagnostic flash indicator B:
90890-06865
2. Start the engine and let it idle.
3. Check the flash pattern of the special
service tool to determine if there are any
malfunctions.
• Normal condition
(no defective part or irregular process-
ing is found)
• Single flash is given every 4.95 sec-
onds.
a: Light on, 0.33 second
b: Light off, 4.95 seconds
9-5
Troubleshooting
S6C19030
• Trouble code indication
9
Example: The illustration indicates
code number 23.
a: Light on, 0.33 second
b: Light off, 4.95 seconds
c: Light off, 0.33 second
d: Light off, 1.65 seconds
4. If a flash pattern listed in the diagnostic
code chart is displayed, check the mal-
functioning part according to the flash
pattern.
NOTE:
When more than one problem is detected,
the light of the special service tool flashes in
the pattern of the lowest numbered problem.
After that problem is corrected, the light
flashes in the pattern of the next lowest num-
bered problem. This continues until all of the
problems are detected and corrected.
6C13G11