Manifold Pressure/Vacuum Sensor: Testing and Inspection

MANIFOLD ABSOLUTE PRESSURE (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: 3.3 - 3.9 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 mmHg, 3.94 in.Hg) segments to 66.7 kPa (500 mmHg, 19.69 in.Hg).
- Measure the voltage drop for each segment from the step above.

MAP Sensor Voltage Drop:

- Reconnect the vacuum hose to the vacuum sensor.