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Oil Pressure Gauge Calibration Test

  1. Test equipment consists of 23 and 73 ohm resistors. Perform the following test in the vehicle with ignition "ON".
  2. Disconnect lead at sending unit and connect 23 ohm resistor between lead and ground. Gauge should read midscale. Connect the 73 ohm resistor between lead and ground; gauge should read low.
  3. If gauge does not function properly, replace IVR and retest. If gauge now reads correctly, IVR was the problem. If gauge is still incorrect, remove and bench test.
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