Dtc B1224 Door Lock Switch Circuit On Passenger Door

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Door Lock. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT DOOR CONTROL SWITCH ASSEMBLY

CHECK WIRE HARNESS (DOOR CONTROL SWITCH ASSEMBLY - PASSENGER DOOR ECU)

DTC B1224 Door Lock Switch Circuit on Passenger Door


DESCRIPTION

If this DTC is output when not operating the switch, it means that the switch is ON, OFF or stuck. If this DTC is not output when operating the switch, switch contact has failed. When something wrong is found using this diagnosis, inspect each switch. Replace the switch if there is a problem or check the front passenger door ECU and wire harness.

DTC No.
DTC Detection Condition
Trouble Area
B1224
When one of following condition is met:
(a) Door control switch (passenger side) is operating
  1. Door control switch assembly
  1. Passenger door ECU

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System. Dtc B1224 Door Lock Switch Circuit On Passenger Door


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System. Dtc B1224 Door Lock Switch Circuit On Passenger Door


INSPECTION PROCEDURE

1.INSPECT DOOR CONTROL SWITCH ASSEMBLY
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System. Dtc B1224 Door Lock Switch Circuit On Passenger Door

  1. Remove the door control switch.

  1. Measure the resistance of the switch.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 - 3
    		Lock
    		Below 1 Ω
    4 - 3
    		Unlock
    		Below 1 Ω
    2 - 3
    		Unlock
    		10 kΩ or higher
    4 - 3
    		Lock
    		10 kΩ or higher


NG
REPLACE DOOR CONTROL SWITCH ASSEMBLY
OK


2.CHECK WIRE HARNESS (DOOR CONTROL SWITCH ASSEMBLY - PASSENGER DOOR ECU)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System. Dtc B1224 Door Lock Switch Circuit On Passenger Door

  1. Disconnect the R3*1 or S8*2 switch connector.

  1. Disconnect the N3*1 or O4*2 ECU connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    LHD
    Tester Connection
    		Specified Condition
    R3-3 (E) - N3-21 (DLE)
    		Below 1 Ω
    R3-4 (UL) - N3-23 (PMUL)
    		Below 1 Ω
    R3-2 (L) - N3-22 (PNL)
    		Below 1 Ω
    R3-5 (IND) - N3-24 (PWS)
    		Below 1 Ω
    RHD:
    Tester Connection
    		Specified Condition
    S8-3 (E) - O4-21 (DLE)
    		Below 1 Ω
    S8-4 (UL) - O4-23 (PMUL)
    		Below 1 Ω
    S8-2 (L) - O4-22 (PNL)
    		Below 1 Ω
    S8-5 (IND) - O4-24 (PWS)
    		Below 1 Ω
    HINT:
    *1: LHD
    *2: RHD


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE PASSENGER DOOR ECU