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Coolant Temp. Switch Signal Circuit Check (4-Speed A/T)

WARNING: This page is about a different car, the 1995 Suzuki Sidekick. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure ignition is off. Disconnect electrical connector at CC ECU. Turn ignition on. Using voltmeter, check voltage between ground and CC ECU connector terminal No. 10. SeeFigure .
  2. With engine coolant temperature less than 77°F (25°C), voltage should be 0-1 volt. With engine coolant temperature greater than 86°F (30°C), voltage should be 10-14 volts.
  3. If voltage is not within specification, check fuses, wiring and electrical connectors for related wiring circuit. See appropriate wiring diagram under WIRING DIAGRAMS  . Repair fuses, wiring or electrical connectors as necessary.
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