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 cip0101

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                                                                                                                      DI-25
                                                  DIAGNOSTICS        -   ENGINE (5VZ-FE)
                                                                                                                      DI0RR-09




    DTC                 P0101               Mass Air Flow Circuit Range/Performance
                                            Problem

CIRCUIT DESCRIPTION
Refer to DTC P0100 on page DI-21 .
  DTC No.                        DTC Detecting Condition                                               Trouble Area
              After engine is warmed up, conditions (a) and (b) continue with
              engine speed 900 rpm or less: (2 trip detection logic)
              (a) Throttle valve fully closed
              (b) Mass air flow meter output u 2.2 V
   P0101                                                                        SM
                                                                                 Mass air flow meter
                                                                                       i fl      t
              Conditions (a) and (b) continue with engine speed 1,500 rpm or
              more: (2 trip detection logic)
              (a) VTA y 0.63 V
              (b) Mass air flow meter output t 1.06 V


INSPECTION PROCEDURE
HINT:
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 was warmed up or not, the air-fuel ratio was lean
or rich, etc. at the time of the malfunction.

   1       Are there any other codes (besides DTC P0101) being output?


                                                             NO          Replace mass air flow meter.


  YES



  Go to relevant DTC chart (See page DI-13 ).




2002 4RUNNER (RM887U)

                                                                                 Author :                  Date :     201

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