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DI-190
                                                   DIAGNOSTICS       -   AUTOMATIC TRANSMISSION
                                                                                                                                  DI0SW-15




     DTC                   P0770             Shift Solenoid "E" Malfunction

                                                         SYSTEM DESCRIPTION
                                                         The ECM uses the signals from the throttle position sensor, air-
                                                         flow meter and crankshaft position sensor to monitor the en-
                                                         gagement condition of the lock-up clutch.
                                                         Then the ECM compares the engagement condition of the
Line                                         Drain
Pressure                                                 lock-up clutch with the lock-up schedule in the ECM memory
                                                         to detect mechanical trouble of the shift solenoid valve SL,
                                                         valve body and torque converter clutch.
                                               D00076


   DTC No.                        DTC Detecting Condition                                              Trouble Area
                Lock-up does not occur when driving in the lock-up range      S Shift solenoid valve SL is stuck open or closed
    P0770       (normal driving at 80 km/h [50 mph]), or lock-up remains ON   S Valve body blocked up or stuck
                in the lock-up OFF range (2 trip detection logic).            S Lock-up clutch
HINT:
Check the shift solenoid valve SL when DTC P0770 (Shift Solenoid "E" Malfunction) is output.

INSPECTION PROCEDURE

    1       Check solenoid valve SL operation.

                                                         PREPARATION:
                                                         (a) Remove the oil pan.
                                                         (b) Remove the shift solenoid valve SL.
   (+)    (-)
                                                         CHECK:
                                                         (a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
                                                             check that the solenoid valve does not leak air.
                                                         (b) When battery voltage is supplied to the shift solenoid
                     (+)   (-)
                                                             valve, check that the solenoid valve opens.
 Q08219
 Q08226                                        D00087    OK:
                                                             (a) Solenoid valve does not leak air.
                                                             (b) Solenoid valve opens.

                                                             NG          Replace the solenoid valve SL.


   OK




2002 4RUNNER (RM887U)

                                                                                 Author :                     Date :                366
                                                                                        DI-191
                                  DIAGNOSTICS   -   AUTOMATIC TRANSMISSION



  2     Check valve body (See page DI-175 ).


                                         NG         Repair or replace the valve body.


  OK



 Replace the torque converter clutch
 (See page AT-18 and AT-22 ).




2002 4RUNNER (RM887U)

                                                          Author :           Date :      367

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