Troubleshooting; Mil Does Not Come On - Honda BF135A Manual

BF135A•BF150A
b. TROUBLESHOOTING

• MIL Does Not Come ON

1. Fuse check
-1. Turn the ignition switch ON and check that the warning
buzzer sounds twice.
Does the buzzer sound twice?
YES – Perform "6. Alternator indicator light check"
NO – Go to the step 2.
-2. Check the No. 4 (15A) fuse.
Is the fuse normal?
YES – Go to the step 3.
NO – Repair open in the wire between the No. 4
fuse and the ECM, and between the No. 4
fuse and the injector. After repair, replace the
No. 4 fuse.
-3. Check the No. 7 (30A) fuse.
Is the fuse normal?
YES – Go to the step 4.
NO – Repair short in the wire between the PGM-FI
main relay and the fuse box, and between the
PGM-FI main relay and the starter magnetic
switch. After repair, replace the No. 7 fuse.
-4. Check the No. 3 (30A) fuse.
Is the fuse normal?
YES – Perform "2. Main power line check".
NO – Repair short in the wire between the fuse box
and the ignition switch, between the fuse box
and the alternator, and between the fuse box
and the power trim/tilt switch or power tilt
switch. After repair, replace the No. 3 fuse.
2. Main power line check
-1. Disconnect the remote control harness 14P connector.
-2. Measure the voltage between the No. 3 (White/Black)
terminal of the main harness side 14P connector and
the engine ground.
• Note that voltage is constantly applied to the
White/Black terminal. Take care not to short-circuit
the terminal.
MAIN HARNESS SIDE
14P CONNECTOR
VIEWED FROM THE
TERMINAL SIDE
Is there the battery voltage?
YES – Go to the step 3.
NO – Repair open in the main harness.
-3. Turn the ignition switch ON. Check for continuity
between the No. 1 (White/Black) terminal and the No.
2 (Black/Yellow) terminal of the remote control box har-
ness side 14P connector.
WHITE/BLACK
VIEWED FROM THE
TERMINAL SIDE
Is there the continuity?
YES – Perform "3. IGP power line check".
NO – Go to the step 4.
-4. Check the ignition switch (P. 16-9).
Is the ignition switch normal?
YES – Repair open in the remote control box har-
ness.
NO – The ignition switch is faulty.
BLACK/WHITE
REMOTE CONTROL
HARNESS SIDE 14P
CONNECTOR
BLACK/YELLOW
5-18