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Home >> Oldsmobile >> 1990 >> Cutlass Calais Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.3L PFI >> Diagnostic Tests >> Code 15: Coolant Temp Sensor Signal Volt High >> Notes

Code 15: Coolant Temp Sensor Signal Volt High: Notes

  1. Code 15 will set if signal voltage indicates a coolant temperature less than -38°F (-39°C) for 60 seconds.
  2. This test simulates conditions for a Code 14. If ECM recognizes low signal voltage and "Scan" tester indicates 130°C, ECM and wiring are okay.
  3. This test will determine if circuit No. 410 is open. Five volts should be present at sensor connector if measured with DVOM.
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