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Transmission Control Switch Circuit: Wiring Diagram

WARNING: This page is about a different variant/trim than selected.
Fig 1: Wiring Diagram - Transmission Control Switch Circuit
G04045803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH) 
    1. Disconnect the transmission control switch connector of shift lock control unit assembly.
    2. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Switch Condition Tester Connection Specified Condition
    Engine switch on (IG) 3 - Body ground 10 to 14 V
    Engine switch off   Below 1 V
    Fig 2: Checking Transmission Control Switch
    G04045804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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.

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Specified Condition
    5 - Body ground Below 1 Ω
    Fig 3: Checking Transmission Control Switch - Body Ground
    G04045805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK : Go to next Step 

  3. INSPECT TRANSMISSION CONTROL SWITCH 
    1. Measure resistance between each terminal of shift lock control unit assembly when the shift lever is moved to each position.

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Shift Position Tester Connection Specified Condition
    S, "+" and "-" 3 - 7 Below 1 Ω
    Except S, "+" and "-"   10 kΩ or higher
    Press continuously "+" (Up shift) 2 - 5 Below 1 Ω
    S   10 kΩ or higher
    Press continuously "-" (Down shift) 1 - 5 Below 1 Ω
    S   10 kΩ or higher
    Fig 4: Inspecting Transmission Control Switch
    G04045806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 shift lock control unit assembly.
    2. Disconnect the ECM connector.
    3. Turn the ignition switch on (IG) position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
      Fig 5: Identifying ECM A6 Connector
      G04045807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Shift Position Tester Connection Specified Condition
      S, "+" and "-" A6-9 (S) - Body ground 10 to 14 V
      Except S, "+" and "-"   Below 1 V
    4. Turn the ignition switch off position.
    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 SPECIFIED CONDITION CHART

    Shift Position Tester Connection Specified Condition
    Press continuously "+" (Up shift) A6-30 (SFTU) - Body ground Below 1 Ω
    S   10 kΩ or higher
    Press continuously "-" (Down shift) A6-19 (SFTD) - Body ground Below 1 Ω
    S   10 kΩ or higher
    Fig 6: Identifying ECM A6 Connector
    G04045808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

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