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Home >> Lexus >> 2013 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission (A760H) (Diagnostic Codes & Circuit Tests) >> Automatic Transmission System (For 4GR-FSE) >> Circuit Tests >> Pattern Select Switch Power Mode Circuit >> Procedure

Pattern Select Switch Power Mode Circuit: Procedure

  1. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSEMBLY - BODY GROUND) 
    1. Disconnect the connector of pattern select switch.
    2. Measure the resistance according to the value(s) in the table below.
      GTY124328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Specified Condition
      3 - Body ground Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT PATTERN SELECT SWITCH ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY113668Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Switch Condition Tester Connection Specified Condition
      Pattern select switch
      (PWR)
      3 - 7 Below 1 Ω
      Pattern select switch
      (NORM)
      10 kΩ or higher

    NG → REPLACE PATTERN SELECT SWITCH ASSEMBLY 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSEMBLY - MAIN BODY ECU) 
    1. Connect the connector of pattern select switch.
      GTY113777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cowl side junction block (main body ECU RH) connector.
    3. Measure the resistance between terminal PWR of the cowl side junction block (main body ECU RH) and body ground.

      Standard resistance

      Switch Condition Tester Connection Specified Condition
      Pattern select switch
      (PWR)
      J75-18 (PWR) - Body ground Below 1 Ω
      Pattern select switch
      (NORM)
      10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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