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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 468 (Driver Door Control System - Diagnosis) >> Circuit Inspection >> DTC B1221 Power window switch circuit on driver, DTC B1222 Door lock switch circuit on driver door >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

These DTC notify how switch works as follows:

If DTC is not output when operating switch, it means failure of switch contact. If DTC is output when not operating switch, it means stick of switch. When something wrong is found by this diagnosis, inspect each switch. Then, replace the switch if there is a problem, or check the wire harness if there is no problem.

DTC B1221 & B1222 TROUBLE DETECTING CONDITION

DTC No. DTC Detecting Condition Trouble Area
B1221 Stick of either of the power window master switch (except window lock switch)
  • Power window master switch
  • Wire harness
B1222 Stick of door key lock and unlock switch
  • Door lock control switch
  • Door key lock and unlock switch
  • Wire harness

HINT:

Please refer to BE section for switch inspection.

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