Manifold Pressure/Vacuum Sensor: Testing and Inspection

The manifold differential pressure (MAP) sensor converts intake manifold pressure into a voltage signal. The engine control module (ECM) uses this signal to determine the condition of the exhaust gas recirculation (EGR).

Circuit Diagram:

Using Voltmeter:

Harness Inspection Procedure:

Troubleshooting Procedures (MAO Sensor):

TROUBLESHOOTING HINTS




The MIL (Malfunction Indicator Lamp) is or the DTC (Diagnostic Trouble Code) is displayed on the HI - SCAN under the following conditions:
1. When the manifold pressure is 4.5 V or more for 4 second.
2. When the manifold pressure is 0.2 V or lower for 4 second.

SENSOR INSPECTION [MAP SENSOR]
1. Connect the voltmeter between 1 and 4 of MAP sensor connector for
Terminal 4 : MAP sensor ground
Terminal 1 : MAP sensor output
2. Measure the voltage of terminals.




3. If the voltage deviates from the standard value, replace the MAP sensor assembly.