MX-5 Miata L4-1597cc 1.6L DOHC (1992)
3.
Bad ECU connection.
4.
ECU malfunction.
If terminal voltage is always approximately 5V, check for:
1.
Sensor out of adjustment.
2.
Open circuit in wiring from ECU terminal 2L to sensor.
3.
Open circuit in sensor ground connection.
