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Corolla, Pickup, 4-Runner

  1. 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.
  2. If reading is incorrect, test gauge resistance. Resistance between oil pressure gauge terminals should be about 44 ohms. If resistance value is incorrect, replace oil pressure gauge.
  3. To test sending unit, unplug connector from sending unit. Test in same manner as Celica sending unit.
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