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Home >> Oldsmobile >> 1989 >> Cutlass Calais Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 2.3L PFI Tests W/Codes >> Diagnosis & Testing >> Code 15, Coolant Temp Sensor Signal Volt High >> Notes

Code 15, Coolant Temp Sensor Signal Volt High: Notes

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. Code 15 will set if signal voltage indicates a coolant temperature less than -40°F (-40°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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