Honda BF135A - Page 44

2-34
BF135A•BF150A
Replace or repair the wire har-
ness (Short in the wire har-
ness between the low pres-
sure side oil pressure switch
and ECM).
Normal (End of inspection)
Replace the oil pressure
switch.
YES
YES
YES
YES
NO
NO
NO
YES
NO
From P. 2-33
To P. 2-35
NO
YES
Disconnect the high pressure
side oil pressure switch 2P con-
nector.
Do the oil indicator light come
ON and the buzzer stop sound-
ing?
Replace or repair the wire har-
ness (Short in the wire har-
ness between the high pres-
sure side oil pressure switch
and ECM).
Substitute a known-good ECM
and recheck.
Substitute a known-good ECM
and recheck.
Start the engine.
Is the oil indicator light ON with
the engine idling?
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.
Is there continuity?
Oil pressure
switch 2P
connector
Viewing from
terminal side
Snap the engine (4,000 min
-1
/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?
Check for short in the low pres-
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?
Disconnect the low pressure
side oil pressure switch wire.
Do the oil indicator light come
ON and the warning buzzer
stop sounding?