Manifold Pressure/Vacuum Sensor: Testing and Inspection

Manifold Absolute Pressure Sensor(MAP)
The manifold absolute pressure sensor(MAP) converts intake manifold pressure into a voltage signal. ECU uses this signal to determine the condition of the engine load.

Circuit Diagram:

Sensor Checking

Using Hi-Scan (Pro):

Harness Inspection Procedure:

Troubleshooting Procedures (Map Sensor):

Troubleshooting Hints
The MIL (Malfunction Indicator Lamp) is ON 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 the MAP sensor connector
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.