Genuine Acura TL Coolant Temperature Sensor

Acura TL Coolant Temperature Sensor Parts Questions & Answers

• Water Temperature Sensor Assembly (Hadsys)
  37870-PK2-015
  Q: How to check and replace the Coolant Temperature Sensor?

  A: The temperature gauge relies on a sending unit in the engine's water passage. If the gauge reads HOT on a cold engine, check for a short circuit in the wiring. If the engine is warm but the gauge reads COLD, test the gauge by grounding the wire to the sending unit with the ignition On and engine OFF. To test the unit, disconnect the connector and use an ohmmeter from the sender's pin to an engine ground. Apply conductive sealant on the threads of the new unit, not Teflon tape. Disconnect the connector, replace the unit quickly, reconnect the connector, and test the gauge.