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THERMO-Time Switch: Toyota

  1. Disconnect thermo-time switch connector. Connect ohmmeter between terminal STA and STJ on thermo-time switch and measure resistance. Then, measure resistance between terminal STA and ground.
  2. Resistance between terminal STA and ground should be 20-80 ohms. Resistance between terminal STA and STJ should be 20-40 ohms with coolant temperature below 95°F (35°C) and 40-60 ohms with coolant temperature above 95°F (35°C).
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