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Home >> Lexus >> 2003 >> SC 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 263 (Lighting System - Diagnosis) >> Headlight Beam Level Control Ecu Communication Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR 
    1. Check for open and short circuit in harness and connector between terminal FLO of skid control ECU and terminal SPDL of headlight beam level control ECU.
    2. Check for open and short circuit in harness and connector between terminal B2 of headlight beam level control ECU and terminal HDLV of passenger side J/B ECU.
    3. Check for open and short circuit in harness and terminal WNG of headlight beam level control ECU and terminal WNG of passenger side J/B ECU.
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON (See  PROBLEM SYMPTOMS TABLE  )