Component Inspection

1. Turn ignition switch OFF.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF, wait at least 5 seconds and then turn ON.
4. Check the voltage between ECM harness connector terminals as follows.

   ECM
   Connector	+	-
   	Terminal
   F143	45	78

   NOTE:

   • To avoid the influence of intake manifold vacuum, check the voltage 1 or more minutes past after engine is stopped.
   • Because the sensor is absolute pressure sensor, output value may differ depending on atmospheric pressure and altitude.
5. Measure the atmospheric pressure.
   NOTE: As the atmospheric pressure described on the synoptic chart is the value at sea level, compensate the pressure with the following chart.

   Altitude (m)	Compensated pressure (hPa)
   0	0
   200	-24
   400	-47
   600	-70
   800	-92
   1000	-114
   1500	-168
   2000	-218

6. Check the manifold absolute pressure sensor value corresponding to the atmospheric pressure.

   Atmospheric pressure (hPa)	Voltage (V)
   800	1.4 - 1.9
   850	1.5 - 2.0
   900	1.6 - 2.1
   950	1.7 - 2.2
   1000	1.75 - 2.3
   1050	1.8 - 2.4

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace MAP sensor.

1. Start engine and let it idle.
2. Check intake manifold vacuum.
3. Check the voltage between ECM harness connector terminals as follows.

   ECM
   Connector	+	-
   	Terminal
   F143	45	78

4. Confirm the difference of the voltage when engine is stopped and at idling is within the values shown in the following chart.

   Intake manifold vacuum [kPa (mmHg)]	Voltage difference (V)
   -40 (-300)	0.8 - 1.3
   -53.3 (-400)	1.0 - 1.5
   -66.7 (-500)	1.2 - 1.7
   -80 (-600)	1.4 - 1.9

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace MAP sensor. Refer to INTAKE MANIFOLD COLLECTOR : Exploded View .