TOHATSU BFT250A Service Manual page 286

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IGNITION SYSTEM
7. Timing belt driven pulley inspection
Check for proper installation of the timing belt driven pulley.
Is the timing belt driven pulley installed correctly?
YES
NO
8. Emergency stop switch signal line short circuit inspection
Disconnect the ECM connector A
Disconnect the switch panel wire harness 14P connector
Check for continuity between the ECM connector B
terminal, No.31 (Black/Red) terminal and engine ground.
Is there continuity?
YES
NO
SPARK TEST
Inspect the following before doing a spark test.
– Spark plug
– Loose direct ignition coil 3P connector connection
– Water in the direct ignition coil (leaking the direct
ignition coil secondary voltage)
Remove the direct ignition coil (page 3-17).
Connect the direct ignition coil 3P connector.
Connect a known-good spark plug [1] to the direct
ignition coil and ground the spark plug to the engine.
Crank the engine with the starter motor and check
whether sparks jump across the electrodes.
8-4
– GO TO STEP 8.
– Correct the timing belt driven pulley installation
– Repair the short circuit in emergency stop switch wire.
– Replace the ECM with a new one and recheck
and B .
.
main wire harness side No.30 (Black/Red)
[1]