Code 15: Coolant Temp Sensor Signal Volt High: Notes
- Code 15 will set if signal voltage indicates a coolant temperature less than -38°F (-39°C) for 60 seconds.
- 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.
- This test will determine if circuit No. 410 is open. Five volts should be present at sensor connector if measured with DVOM.