Manifold Pressure/Vacuum Sensor: Testing and Inspection

MAP SENSOR INSPECTION





1. INSPECT POWER SOURCE VOLTAGE OF MAP SENSOR
- Disconnect the MAP sensor connector.
- Turn the ignition switch ON.





- Using a voltmeter, measure the voltage between connector terminals VC and E2 of the wiring harness side.

Voltage: 4.5 - 5.5 V

- Turn the ignition switch to LOCK.
- Reconnect the MAP sensor connector.
2. INSPECT POWER OUTPUT OF MAP SENSOR
- Turn the ignition switch ON





- Disconnect the vacuum hose from the vacuum sensor.





- Connect a voltmeter to terminals PIM and E2 of the ECM, and measure the output voltage under ambient atmospheric pressure.
- Apply vacuum to the MAP sensor in 13.3 kPa (100 mm Hg, 3.94 in.Hg) segments to 66.7 kPa (500 mmHg, 19.69 in.Hg).
- Measure the voltage drop from step (c) above for each segment.





Voltage drop

- Reconnect the vacuum hose to the vacuum sensor.