Component Inspection

Component Inspection

1. CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR-1

   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
      F24	52	49

      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	3.1 – 3.7
      850	3.3 – 3.9
      900	3.5 – 4.1
      950	3.8 – 4.3
      1000	4.0 – 4.6
      1050	4.2 – 4.8

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Replace MAP sensor. Refer to Removal and Installation.

2. CHECK MAP SENSOR-2

   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
      F24	52	49

   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
      −40 (−300)	1.5 – 2.0 V
      −53.3 (−400)	2.0 – 2.6 V
      −66.7 (−500)	2.6 – 3.2 V
      −80 (−600)	3.2 – 3.8 V

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace MAP sensor. Refer to Removal and Installation.