DTC    B1224    Door Lock Switch Circuit on Passenger Door

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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


B106238E02


B106238E03


INSPECTION PROCEDURE

1.INSPECT DOOR CONTROL SWITCH ASSEMBLY
B106209E01

  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)
B106220E03

  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