Manifold Absolute Pressure (MAP) Sensor Inspection

Check sensor O-ring (1) for damage and deterioration. Replace as necessary.

Fig 1: Checking Sensor O-Ring For Damage & Deterioration
Courtesy of SUZUKI OF AMERICA CORP.
Arrange new three 1.5 V batteries (2) in series and connect its positive terminal to "Vin" terminal and negative terminal to "Ground" terminal. Then, check voltage between "Vout" and "Ground". Also, check if voltage reduces when vacuum is slowly applied up to 400 mmHg by using vacuum pump (3). If check result is not satisfactory, replace manifold absolute pressure sensor (1).
CAUTION: As connection to wrong terminal will cause damage to manifold absolute pressure sensor, make absolutely sure to connect properly as shown in the figure.

Manifold absolute pressure output voltage ("Vin" voltage: 4.5-5.5 V, ambient temp. 20-30 °C (68-86 °F))

Fig 2: Manifold Absolute Pressure Output Voltage Chart
Courtesy of SUZUKI OF AMERICA CORP.

Fig 3: Checking Manifold Absolute Pressure Output Voltage
Courtesy of SUZUKI OF AMERICA CORP.