TOHATSU BFT115A Service Manual page 110

TROUBLESHOOTING
5. MIL inspection
Turn the combination switch OFF.
Short the No.3 terminal (Red/Blue) of the ECM
connector A
connector to engine ground using a jumper wire.
Turn the combination switch ON.
Does the MIL come ON?
YES
NO
6. 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
7. Oil indicator light inspection
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
4-20
main wire harness side
12
– 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
12
– GO TO STEP 7.
– • 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
12
– 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.
ECM CONNECTOR A
MAIN WIRE HARNESS SIDE
12
WARNL
(Red/Blue)
ECM CONNECTOR A
MAIN WIRE HARNESS SIDE
12
OHL
(Red)
ECM CONNECTOR A
MAIN WIRE HARNESS SIDE
12
OPL
(Yellow)