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Inspection Procedure

  1. Check pattern select switch (PWR mode switch). 

    PREPARATION: 

    Disconnect the pattern select switch connector.

    CHECK: 

    Check continuity between terminals 3 and 5 of pattern select switch connector when the select switch is set to PWR and NORM positions.

    OK: 

    PATTERN SELECT SWITCH POSITION AND SPECIFIED CONDITION

    Pattern select switch Specified condition
    PWR Continuity
    NORM No continuity
    Fig 1: Checking Continuity Between Terminals 3 & 5 Of Pattern Select Switch Connector
    G03070375Courtesy 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 PWR of ECM and body ground. 

    PREPARATION: 

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

    CHECK: 

    Check continuity between terminal PWR of ECM and body ground when the pattern select switch is set to the PWR (POWER) position and NORM (NORMAL) position.

    OK: 

    PATTERN SELECT SWITCH POSITION AND SPECIFIED CONDITION

    Pattern select switch Specified condition
    PWR Continuity
    NORM No Continuity

    HINT:

    The ECM uses the normal pattern signal if the PWR signal is not input.

    Fig 2: Disconnecting ECM Connector
    G03070376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Proceed to next circuit inspection shown on matrix table (See  PROBLEM SYMPTOMS TABLE  ). 
    2. NG: Repair or replace harness or connector (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
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