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Temperature Sending Unit Test

  1. Let engine cool. Unplug coolant temperature sender connector, located at upper right rear of engine. Start and warm engine. Measure sensor resistance as engine warms to operating temperature.
  2. With coolant temperature at 167°F (75°C), sensor resistance should be 179-219 ohms. With coolant temperature at 212°F (100°C), sensor resistance should be 60-72 ohms. Replace sensor if resistance is not as specified.
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