Manifold Absolute Pressure (MAP) Sensor Inspection

Disconnect connector from MAP sensor.
Remove MAP sensor.

Arrange 3 new 1.5 V batteries (2) in series (check that total voltage is 4.5 - 5.0 V) and connect its positive terminal to "Vin" terminal of sensor and negative terminal to "Ground" terminal. Then check voltage between "Vout" and "Ground".

Also, check if voltage reduces when vacuum is applied up to 400 mmHg by using vacuum pump (3).

If check result is not satisfactory, replace MAP sensor (1).

Output voltage (When input voltage is 4.5 - 5.5 V, ambient temp. 20 - 30°C, 68 - 86°F)

BAROMETRIC PRESSURE AND 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

Install MAP sensor (1) securely.
Connect MAP sensor (1) connector securely.

Fig 1: Checking Voltage Between Vin Terminal And Ground Terminal Of Sensor
Courtesy of SUZUKI OF AMERICA CORP.