3-62 ENGINE CONTROL SYSTEM
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)
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 wire harness.
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:
!
Engine running Infinity
Engine stopped Continuity
1
1. Oil pressure switch
1
1. ECM main relay
12 V power Continuity
Applied Yes
Not applied No
Do not touch 12 V power supply wires to each other or
with other terminals.
CONT
12 V
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