MAP Sensor Inspection
Precautions: General safety (00)
NOTICE:
If excessive vacuum is applied, the MAP sensor may be damaged.
Do not exceed a vacuum of –70 kPa (–0.7 kgf/cm2, –10.2 psi, –0.7 bar).
1)Remove MAP sensor. 
2)Check MAP sensor output voltage as follows.
If faulty condition is found, replace MAP sensor.
If faulty condition is found, replace MAP sensor.
a)Arrange 3 new 1.5 V batteries (1) in series, and check that total voltage is 4.5 to 5.0 V.
b)Connect voltmeter (2), special tool and batteries to MAP sensor as shown in figure.
c)Check that voltage drops gradually when vacuum is gradually applied with special tool.
NOTICE:
Environmental condition affects output voltage largely.
The sensor voltage below is reference value when measuring under the following conditions.
•Power supply voltage: 5 V
•Ambient temperature: 20 °C (68 °F)
•Atmospheric pressure: 101.3 kPa (1.01 kgf/ cm2, 14.7 psi, 1.01 bar)
•Ambient temperature: 20 °C (68 °F)
•Atmospheric pressure: 101.3 kPa (1.01 kgf/ cm2, 14.7 psi, 1.01 bar)
MAP sensor reference voltage
Atmospheric pressure: Approx. 4.1 V
Vacuum of –30 kPa (–0.3 kgf/cm2, –4.35 psi, –0.3 bar): Approx. 2.9 V
Vacuum of –60 kPa (–0.6 kgf/cm2, –8.70 psi, –0.6 bar): Approx. 1.7 V