STANDARD IGN PARTS Engine Control Module Wiring Relay RY-412
- Communicates the engine coolant temperature to the ECM to ensure proper air/fuel ratio, cooling fan and temperature gauge operation.
- Thermistor placement within the housing matches original design to ensure proper output.
- Proper thermal conductive grease to provide accurate temperature transfer to the thermistor.
- Causes for replacement: check engine light, no/erratic gauge operation, no/erratic cooling fan operation, engine overheating.
- Causes for replacement: rough idle, engine hesitation, poor fuel economy, failed emissions test.