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Home >> Toyota >> 2003 >> Corolla CE, Automatic >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transmission Control System Electronic Controlled (ECT) - Diagnostics >> O/D Main Switch Circuit >> Inspection Procedure
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Inspection Procedure

  1. READ VALUE OF OBD II SCAN TOOL OR HAND-HELD TESTER 
    1. Warm up the engine.
    2. Turn the ignition switch OFF.
    3. Connect the OBD II scan tool or hand-held tester to the DLC3.
    4. Turn the ignition switch ON and push the OBD II scan tool or hand-held tester main SW ON.
    5. Select the item "OVERDRV CUT SW1" in the DATALIST and read its value displayed on the OBD II scan tool or hand-held tester.
    NOTE: The values given below for "Normal Condition" are representative values, so a vehicle may still be normal even if its value differs from those listed here. Do not depend solely on the "Normal Condition" here when deciding whether or not the part is faulty.
    Fig 1: OBDII Scan Tool Normal Condition Value
    G02832911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

    NG 

  2. INSPECT TRANSMISSION CONTROL SWITCH 
    Fig 2: Identifying Transmission Control Switch Terminals
    G02832912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector of transmission control switch.
    2. Check continuity between terminals 2 and 4 of transmission control switch.

      OK: 

      CONTINUITY CHECK

      Transmission control switch Specified Condition
      Press Continuously Transmission Control Switch Continuity
      Release Transmission Control Switch No Continuity

      NG: REPLACE TRANSMISSION CONTROL SWITCH (See  OVERHAUL - A245E & A246E  ) 

      OK 

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM) 
    Fig 3: Checking Continuity Between Terminals ODMS And E1 Of ECM
    G02832913Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the connector of transmission control switch.
    2. Disconnect the ECM connector.
    3. Check continuity between terminals ODMS and E1 of ECM.

      OK: 

      CONTINUITY CHECK

      Transmission Control Switch Specified Control
      Press Continuously Transmission Control Switch Continuity
      Release Transmission Control Switch No Continuity

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See  INTRODUCTION  .) 

      OK 

      CHECK AND REPLACE ECM (See  INTRODUCTION  .) 

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