Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 eg cip1350

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DI-130
                                                     DIAGNOSTICS       -   ENGINE
                                                                                                                                          DI6T9-02




     DTC                   P1350               VVT Sensor/Camshaft Position Sensor Cir-
                                               cuit Malfunction (Bank 2)

CIRCUIT DESCRIPTION
VVT sensor (VV signal) consists of a magnet, iron core and pickup coil.
The VV signal plate has 3 teeth on its outer circumference and is installed the camshaft timing gear.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change,
causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.
The actual camshaft angle is detected by the VVT sensor and it provides feedback to the ECM to control
the intake valve timing in response to during condition.
    DTC No.                         DTC Detecting Condition                                                Trouble Area
                  No VVT sensor (Camshaft position sensor) signal to ECM
                  during cranking at 4 sec. or more                               S Open or short in VVT sensor (camshaft position sensor) cir-
                                                                                    cuit
    P1345         No VVT sensor (Camshaft position sensor) signal to ECM with
                                                                                  S VVT sensor (camshaft position sensor)
    P1350         5 sec. or more engine speed 600 rpm or more
                                                                                  S Camshaft timing gear
                  While crankshaft rotates twice, VVT sensor (Camshaft position   S ECM
                  sensor) signal will be input to ECM 5 times.


WIRING DIAGRAM
Refer to DTC P0335 on page DI-65 .

INSPECTION PROCEDURE
HINT:
S        If DTC P1345 is displayed, check left bank VVT sensor (camshaft position sensor).
S        If DTC P1350 is displayed, check right bank VVT sensor (camshaft position sensor).
S        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       Check resistance of VVT sensor (See page IG-7 ).

                                                           Reference: INSPECTION USING OSCILLOSCOPE
     VV1, VV2 and NE Signal Waveforms
                                              2V           During idling, check the waveforms between terminals VV1 and
                                              /Division    NE+, and VV2 and NE- of the ECM connector.
    VV1                                         GND
                                                           HINT:
    VV2                                         GND         S    The correct waveforms are as shown.
                                                            S    The waveform frequency is shortened as the engine
    NE                                          GND
                                                                 speed becomes higher.

              20 msec./Division (Idling)          A11663       NG          Replace VVT sensor.


    OK




2001 SIENNA (RM787U)

                                                                                     Author :                    Date :                     284
                                                                                             DI-131
                                 DIAGNOSTICS   -   ENGINE



  2     Check for open and short in harness and connector between ECM and VVT sen-
        sor (See page IN-31 ).


                                        NG         Repair or replace harness or connector.


  OK



  3     Inspect sensor installation and signal plate teeth of camshaft timing gear.


                                        NG         Tighten sensor. Replace camshaft timing gear.


  OK



 Check and replace ECM (See page IN-31 ).




2001 SIENNA (RM787U)

                                                         Author :          Date :             285

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