Inspection Procedure

1. Check that the DTC B1221 is output when power window master switch is operated.

   HINT:

   • If B1221 is output when the switch is not operated, it is detected the switch sticking.
   • If B1221 is not output when switch is operated, it is detected that the switch contact condition is bad.

1. NG: GO TO (See  FLOW CHART  ) 
2. OK: Go to next step. 

1. Check the power window master switch condition by the data monitor.

   Standard: (Driver door ECU) 

   Fig 1: Driver Door ECU Test Table - Using Hand-Held Tester

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH 
2. NG: Go to next step. 

1. Remove the power window master switch.
2. Check the continuity between the terminals when the power window switch for driver door is operated.
   Fig 2: Driver Door Power Window Switch Continuity Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   Fig 3: Identifying Driver Door Power Window Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY 
2. OK: Go to next step. 

1. Disconnect the master switch and D17 ECU connectors.
   Fig 4: Identifying P14 Power Window Regulator Master Switch & Multiplex Network Door ECU Front (LH) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the continuity between the connector terminals of master switch and ECU.

   Standard: 

   Fig 5: Specified Condition Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK: Go to next step. 

REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH