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Home >> Lexus >> 2005 >> LX 470 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - Diagnostics >> Pattern Select Switch Circuit (2nd Start Switch) >> Inspection Procedure
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Inspection Procedure

  1. Check pattern select switch (2nd start switch). 

    PREPARATION: 

    Disconnect the pattern select switch connector.

    CHECK: 

    Check continuity between terminals 2 and 3 of pattern select switch connector when pattern select switch is set to 2nd start switch ON and OFF.

    OK: 

    2ND START SWITCH AND SPECIFIED CONDITION

    2nd start switch Specified condition
    Press continuously "2nd" switch Continuity
    Release "2nd" switch No continuity
    Fig 1: Checking Pattern Select Switch (2nd Start Switch)
    G02985937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : Replace the pattern select switch. 
    2. OK : Go to Next Step. 
  2. Check harness and connector between terminal SNWI of ECM and body ground. 

    PREPARATION: 

    1. Connect the pattern select switch connector.
    2. Disconnect the connector of ECM.

    CHECK: 

    Check continuity between terminal SNWI of ECM and body ground when the pattern select switch is set to 2nd start switch ON and OFF.

    OK: 

    2ND START SWITCH AND SPECIFIED CONDITION

    2nd start switch Specified condition
    Press continuously "2nd" switch Continuity
    Release "2nd" switch No Continuity
    Fig 2: Identifying SNWI Terminal Of ECM And Body Ground
    G02985938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : Proceed to next circuit inspection shown on matrix chart (See  PROBLEM SYMPTOMS TABLE   ). 
    2. NG : Repair or replace harness or connector (See  PROCEDURE  ).