Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1997MILLENIA V6-2.5L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORTESTING AND INSPECTION
1997 Mazda Millenia V6-2.5L DOHC
Throttle Position Sensor: Testing and Inspection
1997 Mazda Millenia V6-2.5L DOHCSECTION Testing and Inspection
Using The Engine Signal Monitor
1. Remove the PCM.
2. Connect the Special Service Tools to the PCM.
3. Verify that the throttle valve is at the closed throttle position.
4. Turn the ignition switch to ON.
5. Measure the PCM terminal 3B voltage by using a voltmeter.
Specification
Closed throttle position: 0.1-1-1 V
Wide open throttle: 2.8-4.5 V
Verify that the voltage increase is directly proportioned to the throttle valve opening angle.
6. If not as specified, adjust the throttle position sensor.
Using Special Service Tools (NGS)
1. Connect the Special Service Tools to the data link connector 2.
2. Verify that the throttle valve is at the closed throttle position.
3. Turn the ignition switch to ON.
4. Select the PID/DATA MONITOR AND RECORD function of the NGS.
5. Select "TP V" on the NGS display. NGS measures and shows the voltage.
Specification
Closed throttle position: 0.1-1.1 V
Wide open throttle: 2.84.5 V
(Verify that the voltage increase is directly proportioned to the throttle valve opening angle.)
6. If not as specified, adjust the throttle position sensor.
1. Remove the PCM.
2. Connect the Special Service Tools to the PCM.
3. Verify that the throttle valve is at the closed throttle position.
4. Turn the ignition switch to ON.
5. Measure the PCM terminal 3B voltage by using a voltmeter.
Specification
Closed throttle position: 0.1-1-1 V
Wide open throttle: 2.8-4.5 V
Verify that the voltage increase is directly proportioned to the throttle valve opening angle.
6. If not as specified, adjust the throttle position sensor.
Using Special Service Tools (NGS)
1. Connect the Special Service Tools to the data link connector 2.
2. Verify that the throttle valve is at the closed throttle position.
3. Turn the ignition switch to ON.
4. Select the PID/DATA MONITOR AND RECORD function of the NGS.
5. Select "TP V" on the NGS display. NGS measures and shows the voltage.
Specification
Closed throttle position: 0.1-1.1 V
Wide open throttle: 2.84.5 V
(Verify that the voltage increase is directly proportioned to the throttle valve opening angle.)
6. If not as specified, adjust the throttle position sensor.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.