Manifold Pressure/Vacuum Sensor: Testing and Inspection

Vacuum Sensor Circuit Diagram:

Circuit Diagram

Vacuum Sensor Inspection:

Inspect Power Source Voltage Of Vacuum Sensor
- Disconnect the vacuum sensor connector.
- Turn the ignition switch ON.
- Using a voltmeter, measure the voltage between terminals VCC and E2 of the vacuum sensor connector.

Voltage: 4 - 6 V

Vacuum Sensor Inspection:

Inspect Power Output Of Vacuum Sensor
- Turn the ignition switch ON.
- Disconnect the vacuum hose of the intake chamber side.
- Connect a voltmeter to terminals PIM and E2 of the ECU, and measure and record the output voltage under ambient atmospheric pressure.
- Apply vacuum to the vacuum sensor in 13.3 kPa (100 mmHg, 3.94 in.Hg) stages to 66.7 kPa (500 mmHg, 19.69 in.Hg).
- Measure voltage drop for each stage.

Vacuum Sensor Voltage Drop:

Voltage drop chart