LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 422 (Power Window Control System - Diagnostics) >> DTC B2221 Jam Protection Pulse Sensor Circuit On Back Door >> Auto Up/Down Function Does Not Operate >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. Reset Power Window Regulator Motor 
    1. Turn the ignition switch ON.
    2. Open the back door glass.
    3. Push down the back door power window switch until the door glass is fully closed, and hold the switch 1 second more even after the door glass is fully closed.
    4. Check that the AUTO UP/DOWN function operates completely.
    1. OK: END 
    2. NG: Go to Next Step 
  2. Check Harness And Connector (Back Door ECU >--< Power Window Motor) 
      Fig 1: Identifying Back Door ECU & Power Window Motor Terminals
      G02815525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B9 back door ECU connector.
    2. Disconnect the B11 back door power window motor connector.
    3. Check the continuity between wire harness side connectors.

      Standard: 

      Fig 2: B9 & B11 Terminal Specifications Table
      G02815524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Replace Power Window Regulator Motor Assy LH 
    2. NG: Repair Or Replace Harness And Connector 
scientia non olet · About LEMON Manuals