Temperature Sensor (Gauge): Testing and Inspection

Oil & Temperature Sending Units
1. Test dash gauge and IVR as outlined above.
2. If system is satisfactory, start engine and allow it to reach operating temperature.
3. If no reading is indicated on the gauge, check the sending unit-to-gauge wire by removing the wire from the sending unit and momentarily ground this wire to a clean, unpainted portion of the engine.
4. If the gauge still does not indicate, the wire is defective. Repair or replace the wire.
5. If grounding the new or repaired wire causes the dash gauge to indicate, the sending unit is faulty.