LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> RX 350 FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - U151E >> Automatic Transaxle System >> Transmission Control Switch Circuit >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 SPECIFIED CONDITION CHART

      Switch Condition Tester Connection Specified Condition
      IG switch ON 3 - Body ground 10 to 14 V
      IG switch OFF ↑ Below 1 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 1: Identifying T7 Connector Terminals
    G05271808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      10 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Identifying T7 Connector Terminals
    G05271809Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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.

      Resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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
      Fig 3: Identifying T7 Connector Terminals - Switch Side
      G05271810Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 SPECIFIED CONDITION CHART

      Shift Position Tester Connection Specified Condition
      S, "+" and "-" E6 - 20 (S) - Body ground 10 to 14 V
      Except S, "+" and "-" ↑ Below 1 V
      Fig 4: Disconnecting E6 Transmission Control Switch Connector
      G05271811Courtesy 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 SPECIFIED CONDITION CHART

      Shift Position Tester Connection Specified Condition
      Press continuously
      "+"
      (Up shift)      		 E6 - 6 (SFTU) - Body ground Below 1 Ω
      S ↑ 10 kΩ or higher
      Press continuously
      "-"
      (Down shift)      		 E6 - 5 (SFTD) - Body ground Below 1 Ω
      S ↑ 10 kΩ or higher
      Fig 5: Disconnecting E6 Transmission Control Switch Connector
      G05271812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

scientia non olet · About LEMON Manuals