TOHATSU BFT115A Service Manual page 312

IGNITION SYSTEM
7. Emergency stop switch signal line short circuit inspection
Disconnect the ECM connector A
Disconnect the switch panel cable 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:
– Faulty spark plug
– Loose spark plug cap or direct ignition coil 3P
connector connection
– Water in the direct ignition coil cap (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 cylinder
head cover mounting nut.
Crank the engine with the starter motor and check
whether sparks jump across the electrodes.
8-4
– Repair short in the main wire harness between the remote control box and ECM.
– Replace the ECM with a new one and recheck.
and B .
12 13
.
main wire harness side No.30 (Black/Red)
13
(1)