LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2011 >> ES 350 >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System (Diagnostic Codes & Circuit Tests) >> Power Window Control System >> Circuit Tests >> ECU Power Source Circuit >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ECU Power Source Circuit: Procedure

  1. CHECK WIRE HARNESS (POWER WINDOW ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the power window ECU connector.
      Fig 1: Checking Wire Harness (Power Window ECU - Battery And Body Ground)
      GTY117673Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      2 (B) - Body ground Engine switch on (IG) 10 to 14 V

      Standard resistance

      Tester Connection Condition Specified Condition
      1 (E) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE FUSE, HARNESS OR CONNECTOR 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE