Throttle Sensor
- Warm engine to normal operating temperature. Stop engine. Connect tachometer to engine. Disconnect throttle sensor electrical connector, located on right side of engine (Black/Yellow and Green/Black wires).
- Using 2 voltmeters, connect positive lead of voltmeter to Light Green/Yellow wire terminal of throttle sensor check connector and connect positive lead of other voltmeter to Green/Yellow wire terminal of throttle sensor connector. Connect negative terminals of both voltmeters to good ground. See Fig. 2.
Courtesy of MAZDA MOTORS CORP.
- Start engine and run at 3000 RPM. Quickly decelerate engine. Current should flow to both terminals simultaneously when engine speed is 1000-1200 RPM. If current does not flow to both terminals at the same time, remove cap from throttle sensor adjusting screw and adjust throttle sensor.
- Adjust timing of current flow to voltmeter "A" in Fig. 2
by turning throttle sensor adjusting screw. Turning screw in causes current to flow to Light Green/Yellow wire at higher engine speed. Turning screw out causes current to flow to Light Green/Yellow wire at lower engine speed. After adjustment, install cap on throttle sensor adjusting screw and retest throttle sensor.