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Transmission Control Switch Circuit: Procedure

  1. INSPECT TRANSMISSION CONTROL SWITCH 
    1. Disconnect the transmission control switch connector.
      Fig 1: Inspecting Transmission Control Switch
      GTY311315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      6 (IG) - 13 (S) Shift lever in S, "+" or "-" Below 1 Ω
      Shift lever not in S, "+" and "-" 10 kΩ or higher
      5 (SFTU) - 11 (E) Shift lever continuously shifted to "+"
      (Up-shift)      		 Below 1 Ω
      Shift lever in S 10 kΩ or higher
      4 (SFTD) - 11(E) Shift lever continuously shifted to "-"
      (Down-shift)      		 Below 1 Ω
      Shift lever in S 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Transmission Control Switch)

    NG → See step   5 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - BATTERY, BODY GROUND) 
    1. Turn the ignition switch to ON.
      Fig 2: Checking Harness And Connector (Transmission Control Switch - Battery, Body Ground)
      GTY312007Courtesy 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
      C33-6 (IG) - Body ground Ignition switch ON 11 to 14 V
      C33-6 (IG) - Body ground Ignition switch off Below 1 V
    3. Turn the ignition switch off.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C33-11 (E) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Transmission Control Switch)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM) 
    1. Reconnect the transmission control switch connector.
      Fig 3: Checking Harness And Connector (Transmission Control Switch - ECM)
      GTY312256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the ECM connectors.
    3. Turn the ignition switch to ON.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      B33-74 (S) - Body ground
      • Ignition switch ON
      • Shift lever in S, "+" or "-"
      		 11 to 14 V
      • Ignition switch ON
      • Shift lever not in S, "+" and "-"
      		 Below 1 V
    5. Turn the ignition switch off.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A36-16 (SFTU) - Body ground Shift lever continuously shifted to "+"
      (Up-shift)      		 Below 1 Ω
      Shift lever in S 10 kΩ or higher
      A36-51 (SFTD) - Body ground Shift lever continuously shifted to "-"
      (Down-shift)      		 Below 1 Ω
      Shift lever in S 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to ECM)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  5. REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH). Refer to  REMOVAL 
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