Honda BF135A Manual page 219

BF135A•BF150A
• Alert System Initial Operation Is Faulty
1. Wire harness short-circuit check
-1. Turn the ignition switch OFF and connect the test har-
ness.
-2. Disconnect the ECM connector A, B and C from the
ECM.
-3. Turn the ignition switch ON and check whether the
buzzer sounds.
Does the buzzer sound?
YES – Repair short in the wire between the buzzer
and the ECM.
NO – Go to the step 4.
-4. Check the oil pressure indicator light.
Does the oil pressure indicator light come ON?
YES – Go to the step 5.
NO – Repair short in the wire between the oil pres-
sure indicator light and the ECM.
-5. Check the overheat indicator light.
Does the overheat indicator light come ON?
YES – Repair short in the wire between the overheat
indicator light and the ECM.
NO – Go to the step 6.
-6. Check the MIL.
Does the MIL come ON?
YES – Repair short in the wire between the MIL and
the ECM.
NO – Perform "2. Buzzer line check".
2. Buzzer line check
-1. Connect the test harness B-18 terminal to the engine
ground to short-circuit.
-2. Turn the ignition switch ON and check that the buzzer
sounds.
B-18
Does the buzzer sound?
YES – Perform "3. Overheat indicator line check".
NO – Go to the step 3.
-3. Turn the ignition switch OFF and disconnect the
Yellow/Green terminal from the buzzer.
-4. Connect the Yellow/Green terminal of the buzzer to the
Black terminal with a jumper wire to short-circuit.
-5. Turn the ignition switch ON and check whether the
buzzer sounds.
Does the buzzer sound?
YES – Repair open in the wire between the buzzer
and the ECM.
NO – Go to the step 6.
-6. Check the buzzer (single unit check).
Is the buzzer normal?
YES – Go to the step 7.
NO – The buzzer is faulty.
-7. Check the ignition switch (single unit check) (P. 16-9).
Is the ignition switch normal?
YES – Go to the step 8.
NO – The ignition switch is faulty.
-8. Disconnect the remote control box harness side 14P
connector.
-9. Turn the ignition switch ON. Check for the continuity
between the No. 1 (White/Black) and the No. 2
(Black/Yellow) terminals of the remote control box har-
ness side 14P connector.
WHITE/BLACK
VIEWED FROM THE TERMINAL SIDE
Is there the continuity?
YES – Repair open in the main harness.
NO – Repair open in the remote control box har-
ness.
REMOTE CONTROL
HARNESS SIDE 14P
CONNECTOR
BLACK/YELLOW
5-66