Before Troubleshooting; Alert System/Warning System Troubleshooting; Engine Troubleshooting - TOHATSU BFT75A Service Manual

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TROUBLESHOOTING

BEFORE TROUBLESHOOTING

TROUBLESHOOTING
• Use a known-good battery for troubleshooting.
• Check that the connectors are connected securely.
• Check for sufficient fresh fuel in the fuel tank.
• Check that the emergency stop switch clip is set securely.
• Read the circuit tester's operation instructions carefully, and observe the instructions during inspection.
• When a commercially available circuit tester is used for inspection, use the special tool [Tester probe (Male)
07ZAJ-RDJA110], and take care not to apply excessive force to the connector terminal.
• Switch the tester lead polarities to check the circuit, including the diode. The circuit is normal if there is
continuity in one direction but not the other. If there is continuity in both directions or in neither direction, the
circuit is abnormal.
– Indicator light
– PGM-FI/main relay
– Regulator/rectifier
– Power tilt relay

ENGINE TROUBLESHOOTING

ENGINE DOES NOT START OR ENGINE STALLS
ENGINE DOES NOT START
1. Electrical power system inspection
Turn the combination switch ON.
Check that the MIL and warning buzzer sound.
Does the MIL come ON for 2 seconds and warning buzzer sound twice?
YES
NO
2. Alert system inspection
Check the warning buzzer sound.
Does the warning buzzer sound twice and then stop?
YES
NO
3. Starting system inspection
Check that the starter motor operates properly.
Does the starter motor turn?
YES
NO
4. Vapor separator inspection
Loosen the vapor separator drain screw and check whether fuel flows out.
Does the fuel flow properly?
YES
NO
4-2
– GO TO STEP 2.
– Perform fuse/electrical power system troubleshooting (page 4-12).
– GO TO STEP 3.
– Perform alert system/warning system troubleshooting (page 4-16).
– GO TO STEP 4.
– Perform starting system troubleshooting (page 9-3).
– GO TO STEP 5.
– • Clogged or damaged fuel tube
• Closed fuel tank vent knob
• Faulty primer bulb
• Clogged fuel strainer (Low pressure side)
• Clogged water separator
• Faulty fuel pump (Low pressure side)
• Clogged vapor separator air vent tube or filter
• Faulty vapor separator