Suzuki DF150 Service Manual page 120

OIL PRESSURE SWITCH
NOTE:
Before checking the oil pressure switch, make sure the engine
oil pressure is within specification.
1. Remove the blue lead wire from oil pressure switch.
2. Check the continuity between the switch terminal and engine
body ground.
! 09930-99320: Digital tester
) Tester range: *( (Continuity)
Engine running
Engine stopped
If measurement exceeds specification, replace oil pressure
switch.
3. Reinstall parts removed earlier.
ECM MAIN RELAY
! 09930-99320: Digital tester
) Tester range: *( (Continuity)
1. Disconnect ECM main relay from fuse box.
2. Check continuity between terminal 1 and 2 each time 12 V
is applied. Connect positive + probe to terminal 4, and
negative - probe to terminal 3.
ECM main relay function:
12 V power
Applied
Not applied
#
Do not touch 12 V power supply wires to each other or
with other terminals.
Infinity
Continuity
Continuity
Yes
No
ENGINE CONTROL SYSTEM
1
1. Oil pressure switch
ECM main relay
12 V
3-61
CONT