P0106

DTC P106 Manifold Absolute Pressure Circuit Range/Performance Problem





CIRCUIT DESCRIPTION
By a built-in sensor unit, the manifold absolute pressure sensor detects the intake manifold pressure as voltage. The ECM then determines the basic injection duration and basic injection advance angle based on this voltage. Since the manifold absolute pressure sensor does not use the atmospheric pressure as a criterion, but senses the absolute pressure inside the intake manifold (the pressure in proportion to the present absolute vacuum 0), it is not influenced by fluctuations in the atmospheric pressure due to high altitude and other factors. This permits it to control the air-fuel ratio at the proper lever under all conditions.





DETECTING CONDITIONS





WIRING DIAGRAM

Step 1:

INSPECTION PROCEDURE

HINT:
- If DTC "P0105" (Manifold Absolute Pressure Circuit Malfunction) "P0106" (Manifold Absolute Pressure Circuit Range/Performance Problem), "P0110" (Intake Air Temp. Circuit Malfunction), "P0115" (Engine Coolant Temp. Circuit Malfunction), "P0120" (Throttle/Pedal Position Sensor/Switch "A" Circuit Malfunction) are output simultaneously, E2 (sensor ground) may be open.
- If DTC "P0105" (Manifold Absolute Pressure Circuit Malfunction) and "P0106" (Manifold Absolute Pressure Circuit Range/Performance Problem) are output simultaneously, manifold absolute pressure sensor circuit may be open. Perform troubleshooting of DTC P0105 first.
- Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich. etc. at the time of the malfunction.