Manifold Pressure/Vacuum Sensor: Testing and Inspection
MANIFOLD ABSOLUTE PRESSURE SENSOR (MAP) SENSORThe 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:
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 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.