3-44 ENGINE CONTROL SYSTEM
OIL PRESSURE SWITCH
# 09940-44121 : Air pressure gauge
09930-99320 : Digital tester
: Air pump
) Tester range:
*(*(
*(*(
*((Continuity)
1. Remove the oil pressure switch (See the page 3-53).
2. Connect the gauge and an air pump as shown.
3. While applying pressure to the oil pressure switch, inspect
continuity.
Oil pressure switch function:
ECM MAIN RELAY
# 09930-99320: Digital tester
) Tester range:
**
**
* (Continuity)
1. Disconnect the ECM main relay from the wire.
2. Inspect continuity between the terminal 1 and 2 each time
12 V is applied. Connect the positive + side to the terminal
4, and the negative - side to the terminal 3.
ECM main relay function:
12 V power Continuity
Applied Yes
Not applied No
"
Be careful not to touch 12 V power supply wires to each
other or with the other terminals.
Pressure
kPa (kg/cm
2
)
Continuity
Less than
70 – 130 (0.7 – 1.3)
Ye s
70 – 130 (0.7 – 1.3)
or over
No
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