Ether Injection System Circuit Description

Ether Injection System Circuit Description

If the vehicle is equipped with a manual transmission and is not equipped with a starter thermal switch, voltage is applied to the ether injector temperature switch when the ignition switch is in the START position, and the clutch starter interlock switch is closed (Clutch pedal fully depressed). The ether injector engine coolant temperature switch closes when the ambient temperature is below -5°C (23°F). Voltage is then applied to the ether injector control valve. Since the ether injector control valve is permanently grounded at G101, the valve energizes, and ether is injected into the intake manifold.

If the vehicle is equipped with a starter thermal switch, engine cranking may be interrupted if the starter motor becomes too hot from an extended cranking period.

If the vehicle is equipped with an AT automatic transmission and is not equipped with a starter thermal switch, voltage is applied to the neutral position switch when the ignition switch is placed in START. The neutral position switch closes when the transmission shifter is in the neutral position. With the ignition switch in START and the neutral position switch in neutral, voltage is available to the ether injector engine coolant temperature switch. The ether injector engine coolant temperature switch closes when the ambient temperature is below -5°C (23°F). Voltage is then applied to the ether injector control valve. Since the ether injector control valve is permanently grounded at G101, the valve energizes, and ether is injected into the intake manifold.

If the vehicle is equipped with a starter thermal switch, engine cranking may be interrupted if the starter motor becomes too hot from an extended cranking period.

If the vehicle is equipped with a MD automatic transmission and is not equipped with a starter thermal switch, voltage is applied to the vehicle interface module when the ignition switch is in the START position. When the vehicle interface module receives a neutral position signal from the transmission control module, it will complete an internal circuit in the vehicle interface module, and produce a crank signal to the ether injection engine coolant temperature switch. The ether injection engine coolant temperature switch closes when the ambient temperature is below -5°C (23°F). Voltage is then applied to the ether injector control valve. Since the ether injector control valve is permanently grounded at G101, the valve energizes, and ether is injected into the intake manifold.

If the vehicle is equipped with a starter thermal switch, engine cranking may be interrupted if the starter motor becomes too hot from an extended cranking period.