Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota 4Runner 1996-2003 Approved SIL techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 024runne di eg5vzfe cip0110

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DI-26
                                                                  DIAGNOSTICS       -   ENGINE (5VZ-FE)
                                                                                                                                                          DI0RS-16




                 DTC                   P0110                Intake Air Temp. Circuit Malfunction

CIRCUIT DESCRIPTION
                                                                         The intake air temperature sensor is built into the mass air flow
        Fig. 1                                                           meter and senses the intake air temperature.
                                                                         A thermistor built in the sensor changes the resistance value
                   30                                                    according to the intake air temperature.
                   20                                                    The lower the intake air temperature, the greater the thermistor
                   10                                                    resistance value, and the higher the intake air temperature, the
                                                                         lower the thermistor resistance value (See Fig. 1).
                   5                          Acceptable
  Resistance k




                   3
                                                                         The intake air temperature sensor is connected to the ECM
                   2                                                     (See below ). The 5 V power source voltage in the ECM is ap-
                                                                         plied to the intake air temp. sensor from terminal THA via resis-
                   1
                                                                         tor R.
                  0.5
                  0.3
                                                                         That is, resistor R and the intake air temperature sensor are
                                                                         connected in series. When the resistance value of the intake air
                  0.2
                                                                         temperature sensor changes in accordance with changes in the
                   0.1                                                   intake air temperature, the potential at terminal THA also
                                                                         changes. Based on this signal, the ECM increases the fuel in-
                         - 20 0      20 40 60         80 100
                         (- 4) (32) (68) (104)(140) (176) (212)          jection volume to improve driveability during cold engine opera-
                                 Temp.

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