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Home >> Lexus >> 2005 >> LS 430 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Electronic Controlled Automatic Transmission (ECT) - Diagnostics >> Electronic Controlled Automatic Transmission [ECT] >> Pattern Select Switch Circuit (PWR) >> Inspection Procedure

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.
    3. Fig 1: Identifying Pattern Select Switch Connector Terminals
      G03002507Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    PATTERN SELECT SWITCH NO. 1 - BODY GROUND - RESISTANCE TABLE

    Tester Connection Specified Condition
    1 - Body ground Below 1 Ω

    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.
    2. Fig 2: Identifying Pattern Select Switch Terminals
      G03002509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    Fig 3: Pattern Select Switch Reference Chart
    G03002508Courtesy 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: 

    Fig 4: Pattern Select Switch Reference Chart
    G03002510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Identifying Passenger Side Junction Block Assy
    G03002511Courtesy 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