TOHATSU BFT75A Service Manual page 132

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5. Overheat indicator light inspection
Turn the combination switch OFF.
Short the No.32 terminal (Red) of the ECM
connector A
connector to engine ground using a jumper wire.
Turn the combination switch ON.
Does the overheat indicator light come ON?
YES
NO
6. Oil indicator light inspection
Turn the combination switch ON.
Turn the combination switch OFF.
Short the No.31 terminal (Yellow) of the ECM
connector A
connector to engine ground using a jumper wire.
Turn the combination switch ON.
Does the oil indicator light go off?
YES
NO
main wire harness side 36P
– GO TO STEP 6.
– • Inspect the indicator light
• Repair the open circuit in the main wire
harness
• Replace the ECM with a new one and
recheck
main wire harness side 36P
– Indicator light/warning buzzer is normal.
– • Inspect the indicator light
• Repair the open circuit in the main wire
harness
• Replace the ECM with a new one and
recheck
TROUBLESHOOTING
ECM CONNECTOR A
MAIN WIRE HARNESS SIDE
OHL
(Red)
ECM CONNECTOR A
MAIN WIRE HARNESS SIDE
OPL
(Yellow)
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