TOHATSU 200 Series Service Manual page 50

dummyhead dummyhead
TROUBLESHOOTING
BEFORE TROUBLESHOOTING
TROUBLESHOOTING
• Use a known-good battery for troubleshooting.
• Remove the boat equipment (electrical loads)
• 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 (see below). 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
– Fuse/relay junction box
– Regulator/rectifier
– Power tilt relay
ENGINE TROUBLESHOOTING
ENGINE DOES NOT RUN SMOOTHLY
ENGINE SPEED IS HIGHER (750 min
ELECTRICAL LOAD AFTER WARMING UP
1. Battery test
Remove the battery.
Check the battery condition using the commercially available battery tester.
Is the battery in good condition?
YES
NO
2. Alternator F line inspection
Turn the combination switch OFF.
Disconnect the alternator 4P connector
Turn the combination switch ON.
Measure the voltage between the alternator 4P
connector
(White/Green) and engine ground.
Is there 4.30 – 5.25 V?
YES
NO
4-2
– GO TO STEP 2.
– Faulty battery
wire harness side No.4 terminal
– Replace the alternator with a new one and
recheck.
– Repair open or short circuit in the wire
between the ECM and alternator. If wire
harness is normal, replace the ECM with a
new one and recheck.
-1
(rpm)) THAN THE SPECIFIED IDLE SPEED WITH NORMAL
ALTERNATOR 4P CONNECTOR
.
MAIN WIRE HARNESS SIDE
ACGF
(White/Green)