Manifold Absolute Pressure Sensor On-Vehicle Inspection

Inspect power source voltage.

1. Disconnect the manifold absolute pressure sensor connector.
   

2. Turn the ignition switch on (IG).
   

3. Using a voltmeter, measure the voltage between connector terminals 3 (VC) and 1 (E2) of the wiring harness side.
   

   Standard voltage:

   4.5 to 5.5 V
   

4. Turn the ignition switch off.
   

5. Reconnect the manifold absolute pressure sensor connector.
   

Check the vacuum and pressure.

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch on (IG) and turn the tester ON.
   

3. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP and Atmosphere Pressure.
   

4. Read the value.
   

   OK:

   Condition	MAP Value
   No pressure applied	Same as atmospheric pressure
   Vacuum applied	Becomes vacuum
   Pressure applied	Becomes pressure

   If the result is not as specified, replace the manifold absolute pressure sensor.