Honda BF135A Manual page 44

From P. 2-33
Start the engine.
Is the oil indicator light ON with
the engine idling?
NO
Disconnect the low pressure
side oil pressure switch wire.
Do the oil indicator light come
ON and the warning buzzer
stop sounding?
YES
To P. 2-35
2-34
YES Snap the engine (4,000 min
/rpm or above under no load)
and check the oil indicator and
warning buzzer.
Do the oil indicator light come
ON and the buzzer stop sound-
ing?
NO
Disconnect the high pressure
side oil pressure switch 2P con-
nector.
Do the oil indicator light come
ON and the buzzer stop sound-
ing?
NO
Check for short in the high pres-
sure side oil pressure switch
line.
1 Turn the ignition switch OFF.
2 Check for continuity between
the No. 1 (Green/Red) termi-
nal of the harness side oil
pressure switch 2P connec-
tor and the engine ground.
Oil pressure
switch 2P
connector
Viewing from
terminal side
Is there continuity?
NO
Substitute a known-good ECM
and recheck.
Check for short in the low pres-
NO
sure side oil pressure switch
line.
1 Turn the ignition switch OFF.
2 Check for continuity between
the oil pressure switch ter-
minal and the engine ground.
Is there continuity?
YES
Substitute a known-good ECM
and recheck.
-1 YES Normal (End of inspection)
YES Replace the oil pressure
switch.
Replace or repair the wire har-
YES
ness (Short in the wire har-
ness between the high pres-
sure side oil pressure switch
and ECM).
Replace or repair the wire har-
NO
ness (Short in the wire har-
ness between the low pres-
sure side oil pressure switch
and ECM).
BF135A•BF150A