Corolla RWD, MR2, Pickup & 4Runner
- Unplug connector from sending unit. Connect positive lead from a voltmeter to terminal and negative lead to ground. Turn ignition on. Meter should vibrate near 4.5 volt position.
- If reading is incorrect, test gauge resistance. Resistance between oil pressure gauge terminals should be about 42-44 ohms. If resistance value is incorrect, replace oil pressure gauge.
- To test sending unit, unplug connector from sending unit. Test in same manner as Celica sending unit.