Water Temperature Indicator Sender Unit

1. Let engine cool.
2. Disconnect the water temperature indicator sender unit connector.
3. Measure the resistance between the terminal of the water temperature indicator sender unit and ground.
4. Start the engine.
5. Verify the resistance shown below as the engine warms up:
179-219 (ohms) at 75 °C (167 °F).
60-72 (ohms) at 100 °C (212 °F).
6. If the resistance is not as specified, replace the water temperature indicator sender unit. If the resistance is OK, return to Pinpoint Tests.