LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2002 >> Highlander Limited, AWD >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System - Diagnostics >> Problem Symptoms Table >> DTC B1221/21: Power Window Switch Circuit On Driver Door >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. Check Power Window Regulator Master Switch Assembly 
    1. Check if code B1221 will disappear but only B1211 (communication stop) will be output when the power window regulator master switch assembly connector is disconnected.
    1. A : Replace Multiplex Network Body ECU 
    2. B : Replace Power Window Regulator Master Switch Assembly