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Transmission Control Switch Circuit: Procedure

  1. CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH) 
    1. Disconnect the transmission control switch connector of the shift lever assembly.
      Fig 1: Identifying Transmission Control Switch Connector Terminals
      GTY142021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      3 - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying Transmission Control Switch Connector Terminals
      GTY142021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Condition Specified Condition
      5 - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. INSPECT TRANSMISSION CONTROL SWITCH 
    1. Measure the resistance between each terminal of the shift lever assembly when the shift lever is moved to each position.
      Fig 3: Identifying Transmission Control Switch Connector Terminals
      GTY113763Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Shift Position Specified Condition
      3 - 7 S, "+" and "-" Below 1 Ω
      Except S, "+" and "-" 10 kΩ or higher
      2 - 5 Press continuously
      "+"
      (Up shift)      		 Below 1 Ω
      S 10 kΩ or higher
      1 - 5 Press continuously
      "-"
      (Down shift)      		 Below 1 Ω
      S 10 kΩ or higher

    NG → REPLACE TRANSMISSION CONTROL SWITCH 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM) 
    1. Connect the transmission control switch connector of the shift lever assembly.
      Fig 4: Identifying Transmission Control Switch Connector Terminals
      GTY125013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A10 ECM connector.
    3. Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

      Standard voltage

      Tester Connection Shift Position Specified Condition
      A10-25 (S) - Body ground S, "+" and "-" 11 to 14 V
      Except S, "+" and "-" Below 1 V
    4. Turn the engine switch off.
    5. Disconnect the ECM connector.
    6. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard resistance

      Tester Connection Shift Position Specified Condition
      A10-16 (SFTU) - Body ground Press continuously
      "+"
      (Up shift)      		 Below 1 Ω
      S 10 kΩ or higher
      A10-51 (SFTD) - Body ground Press continuously
      "-"
      (Down shift)      		 Below 1 Ω
      S 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

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