Manifold Absolute Pressure (MAP) Sensor Inspection

Reference: MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REMOVAL AND INSTALLATION

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

Fig 1: Identifying Manifold Absolute Pressure Sensor O-Ring
Courtesy of SUZUKI OF AMERICA CORP.
Arrange 3 new 1.5 V batteries (2) in series and connect its positive terminal to "Vin" terminal of MAP sensor (1) 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.

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.

MAP sensor output voltage (Vin voltage 4.5 - 5.5 V, ambient temp. 20 - 30°C (68 - 86°F))

MAP SENSOR OUTPUT VOLTAGE SPECIFICATION

Altitude (Reference)		Barometric Pressure		Output Voltage
(ft)	(m)	(mmHg)	(kPa)	(V)
0 - 2000	0 - 610	760 - 707	100 - 94	3.3 - 4.3
2001 - 5000	611 - 1524	Under 707, over 634	94 - 85	3.0 - 4.1
5001 - 8000	1525 - 2438	Under 634, over 567	85 - 76	2.7 - 3.7
8001 - 10000	2439 - 3048	Under 567, over 526	76 - 70	2.5 - 3.3

Fig 2: Checking MAP Sensor Output Voltage

Courtesy of SUZUKI OF AMERICA CORP.