Passport 2WD L4-2559cc 2.6L SOHC (4ZE1) (1994)
Manifold Pressure/Vacuum Sensor: Testing and Inspection
1. Warm up the Engine and keep it at idle.
2. Disconnect the Vacuum Hose "A" at Manifold Absolute Pressure (MAP) Sensor, and plug the vacuum hose of VSV; MAP Sensor.
3. Connect the leads of a Digital Multimeter across the terminals ( 1 and 2 ) at the rear face of the MAP Sensor Connector. Digital Multimeter should
indicate more than 2.5V
4. Connect the Vacuum Hose "A" to its original position.
5. Measure the voltage across the terminals ( 1 and 2 ) at the rear face of the MAP Sensor connector. Digital Multimeter should indicate less than
2.5V
If the Digital Multimeter does not indicate the above voltage, replace the MAP Sensor.