LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2006 >> SC 430 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Electronic Controlled Automatic Transmission (ECT) -- Diagnostics >> Pattern Select Switch Circuit (PWR) >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR(PATTERN SELECT SWITCH ASSY NO.1 - BODY GROUND) 
    1. Disconnect the connector of pattern select switch.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      3 - Body ground Below 1 Ω
      Fig 1: Identifying E11 Pattern Select Switch Connector
      G04105538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 

    OK: GO TO NEXT STEP 

  2. INSPECT PATTERN SELECT SWITCH ASSY NO.1 
    1. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Switch Condition Tester Connection Specified Condition
      Pattern select switch (PWR) 3 - 7 Below 1 Ω
      Pattern select switch (NORM) 10 kΩ or higher
      Fig 2: Inspecting Pattern Select Switch Assy
      G04105539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE PATTERN SELECT SWITCH ASSY NO.1 

    OK: GO TO NEXT STEP 

  3. CHECK HARNESS AND CONNECTOR(PATTERN SELECT SWITCH ASSY NO.1 - MULTIPLEX NETWORK BODY ECU) 
    1. Connect the connector of pattern select switch.
    2. Disconnect the passenger side junction block assy (multiplex network body ECU) connector.
    3. Measure the resistance between terminal PWR of passenger side junction block assy (multiplex network body ECU) and body ground.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Switch Condition Tester Connection Specified Condition
      Pattern select switch (PWR) P4-18 (PWR) - Body ground Below 1 Ω
      Pattern select switch (NORM) 10 kΩ or higher
    Fig 3: Identifying Passenger Side Junction Block ECU
    G04105540Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 

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