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Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System - Diagnosis >> Circuit Inspection >> DTC P0607/54: Control Module Performance >> Inspection Procedure

Inspection Procedure

  1. Check wire harness and connector between terminal STP of ECM and stop light switch, and terminal ST1- of ECM and stop light switch (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG : Repair or replace wire harness or connector. 
    2. OK : Go to next step. 
  2. Check wire harness and connector between ECM and cruise control switch, cruise control switch and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG : Repair or replace wire harness or connector. 
    2. OK : Check and replace ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
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