Yamaha F200B, Service Manual

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4-21
TRBL
SHTG
Troubleshooting
Fuel not supplied (all
cylinders) — Measure the fuel pressure. 6-8
Pinched or kinked fuel hose Check the fuel hose. 6-1
Fuel leakage Check for fuel leakage. 6-1
Clogged fuel filter element Check the fuel filter element for dirt
and obstructions.
6-14
High-pressure fuel pump
malfunction Check the high-pressure fuel pump
operation using the YDIS.
5-46
Measure the high-pressure fuel pump
resistance.
5-46
Short, open, or loose
connection in high-pressure
fuel pump circuit Measure the high-pressure fuel pump
input voltage.
5-46
Check for continuity between the high-
pressure fuel pump and the engine
ECM.
5-46
A-5
Check for continuity between the high-
pressure fuel pump and the high-
pressure fuel pump relay.
5-46
A-5
Blown fuse Check the fuse. 5-3
A-5
High-pressure fuel pump
relay malfunction Check the high-pressure fuel pump
relay.
5-47
Short, open, or loose
connection in low-pressure
fuel pump circuit Measure the low-pressure fuel pump
input voltage.
5-46
Check for continuity between the low-
pressure fuel pump and the engine
ECM.
5-46
A-5
Check for continuity between the low-
pressure fuel pump and the main relay.
5-46
Blown fuse Check the fuse. 5-3
A-5
Low-pressure fuel pump
malfunction Check the low-pressure fuel pump
operation using the YDIS.
5-46
Measure the low-pressure fuel pump
resistance.
5-46
Compression pressure
is low — Measure the compression pressure. 7-1
Improper valve timing Check the valve timing. 7-39
Check the timing belt. 7-39
Compression leakage Check the valve for bends and sticking. 7-62
Check the piston and piston rings for
damage.
7-86
Check the cylinder for scratches. 7-86
Symptom 2 Cause Checking step
See
page