2007 Lexus GX 470FACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH - BODY GROUND) 
    Fig 1: Identifying E4 Connector Terminals (1 Of 2)
    G05261294Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector of the pattern select switch.
    2. Measure the resistance according to the value (s) in the table below.

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION TABLE

    Tester Connection Specified Condition
    4 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  2. INSPECT PATTERN SELECT SWITCH ASSEMBLY 
    Fig 2: Identifying E4 Connector Terminals (2 Of 2)
    G05261295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance according to the value (s) in the table below.

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION TABLE

    Switch Condition Tester Connection Specified Condition
    Press continuously pattern select switch (2nd STRT) 3-4 Below 1 Ω
    Release pattern select switch (2nd STRT) ↑ 10 kΩ or higher

    NG: REPLACE PATTERN SELECT SWITCH ASSEMBLY 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH - ECM) 
    1. Connect the connector of the pattern select switch.
      2. Fig 3: Disconnecting ECM Connector
      G05261296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value (s) in the table below.

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION TABLE

    Switch Condition Tester Connection Specified Condition
    Press continuously pattern select switch (2nd STRT) E8 - 27 (SNWI) - Body ground Below 1 Ω
    Release pattern select switch (2nd STRT) ↑ 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.