FixVault
Home › Lexus › 2006 › RX 330 FWD › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transmission (U151E) › Automatic Transaxle System › Transmission Control Switch Circuit › Inspection Procedure

Inspection Procedure

  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.

    Voltage 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Switch Condition Tester Connection Specified Condition
    IG switch ON 3 - Body ground 10 to 14 V
    IG switch OFF Below 1 V
    Fig 1: Identifying Transmission Control Switch Connector Terminals
    G04088457Courtesy 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.

    Resistance 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Specified Condition
    10 - Body ground Below 1 Ω
    Fig 2: Identifying T7 Connector Terminals
    G04088458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. INSPECT TRANSMISSION FLOOR SHIFT ASSEMBLY 
    1. Measure resistance between each terminal of shift lock control unit assembly when the shift lever is moved to each position.
    Fig 3: Identifying T7 Connector Terminals - Switch Side
    G04088459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Resistance (Check for short) 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Shift Position Tester Connection Specified Condition
    S, "+" and "-" 3 - 8 Below 1 Ω
    Except S, "+" and "-" 10 kΩ or higher
    Press continuously "+" (Up shift) 4 - 10 Below 1 Ω
    S 10 kΩ or higher
    Press continuously "-" (Down shift) 5 - 10 Below 1 Ω
    S 10 kΩ or higher

    NG: REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY 

    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. Turn the ignition switch to the ON position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

      Voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Shift Position Tester Connection Specified Condition
      S, "+" and "-" E6 - 23 (S) - Body ground 10 to 14 V
      Except S, "+" and "-" Below 1 V
      Fig 4: Identifying Transmission Control Switch Connector Terminals
      G04088460Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the ignition switch to the LOCK position.
    4. Disconnect the ECM connector.
    5. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

    Resistance 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Shift Position Tester Connection Specified Condition
    Press continuously "+" (Up shift) E6 - 22 (SFTU) - Body ground Below 1 Ω
    S 10 kΩ or higher
    Press continuously "-" (Down shift) E6 - 21 (SFTD) - Body ground Below 1 Ω
    S 10 kΩ or higher
    Fig 5: Identifying Transmission Control Switch Connector Terminals
    G04088461Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

About FixVault