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 cip1126

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                                                                                                                      DI-1 15
                                                  DIAGNOSTICS   -   ENGINE (5VZ-FE)
                                                                                                                       DI8XL-01




    DTC                  P1126              Magnetic Clutch Circuit Malfunction

CIRCUIT DESCRIPTION
Magnetic clutch is mounted between the throttle motor and the valve, and it connects the throttle motor with
the throttle valve.
Therefore, the throttle motor opens and closes the throttle valve through the magnetic clutch.
If the electric throttle control system has a malfunction, the magnetic clutch separates the throttle motor from
the throttle valve in order not to operate the throttle valve by the throttle motor.
If this DTC is stored, the ECM shuts down the power for the throttle motor and the magnetic clutch, and the
throttle valve is fully closed by the return spring.
However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the
throttle cable.
   DTC No.                       DTC Detecting Condition                                           Trouble Area
               Condition (a) continues for 0.8 seconds:
               (a) Magnetic clutch current y 1.4 A or x 0.4 A            S Open or short in magnetic clutch circuit
    P1126                                                                SMMagnetic clutch
                                                                                ti l t h
               Condition (a) continues for 1.5 seconds:
                                                                         S ECM
               (a) Magnetic clutch current y 1.0 A or x 0.8 A


WIRING DIAGRAM
Refer to DTC P1125 on page DI-1 13.

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        Check magnetic clutch circuit.

When using TOYOTA hand-held tester:
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
CHECK:
Read the magnetic clutch current value on the TOYOTA hand-held tester.
OK:
    Current: 0.8 - 1.0 A




 2002 4RUNNER (RM887U)

                                                                          Author :                      Date :         291
DI-1 16
                                       DIAGNOSTICS   -   ENGINE (5VZ-FE)


 CL Signal Waveform                          When not using TOYOTA hand-held tester:
                                5 V/         PREPARATION:
                                Division     (a) Connect the oscilloscope between terminals CL+ and
                                                 CL- of the ECM connector.
                                             (b) Start the engine.
                                             CHECK:
   GND                                       Check the waveform between terminals CL+ and CL- of the
                                             ECM connector when the engine is idling.
             5 msec./Division       A03405   OK:
                                                 The correct waveform is as shown.

                                               NG        Go to step 4.


   OK



   2      Check magnetic clutch (See page SF-30 ).


                                               NG        Replace throttle control motor with magnetic
                                                         clutch (See page SF-32 ).


   OK



   3      Check for open and short in harness and connector between magnetic clutch
          and ECM (See page IN-28 ).


                                               NG        Repair or replace.


   OK




 2002 4RUNNER (RM887U)

                                                                Author :         Date :           292
                                                                                           DI-1 17
                                   DIAGNOSTICS   -   ENGINE (5VZ-FE)



   4    Check operation of magnetic clutch.

CHECK:
(a) Clear the DTC.
(b) Perform the following steps and check the DTC.
    (1) Turn the ignition switch ON.
    (2) Start the engine.
    (3) Turn the ignition switch OFF and wait 3 seconds.
    (4) Turn the ignition switch ON.
OK:
    DTC P1126 is not stored.

                                          NG         Replace throttle control motor with magnetic
                                                     clutch (See page SF-32 ).


  OK



 Check and replace ECM (See page IN-28 ).




2002 4RUNNER (RM887U)

                                                           Author :         Date :           293

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