Dtc B1249 Double Locking Ecu Communication Stop

Power Source Network. Land Cruiser. Urj200, 202 Grj200 Vdj200
Networking. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (DOUBLE LOCK CONTROL RELAY ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU]

CHECK HARNESS AND CONNECTOR (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY VOLTAGE AND BODY GROUND)

REPLACE DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY - COWL SIDE JUNCTION BLOCK LH

DTC B1249 Double Locking ECU Communication Stop


DESCRIPTION

DTC B1249 is stored when communication between the double lock door control relay assembly and main body ECU (multiplex network body ECU) stops for more than 10 seconds.

DTC Code
DTC Detection Condition
Trouble Area
B1249
No communication from the double door lock relay assembly for more than 10 seconds.
  1. Double lock door control relay assembly
  2. Main body ECU (multiplex network body ECU)
  3. Cowl side junction block LH
  4. Harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B1249 Double Locking Ecu Communication Stop


INSPECTION PROCEDURE

NOTICE:
  1. When using the GTS with the ignition switch off to troubleshoot:
    Connect the GTS to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
DTC B2325 is output when the communication between all of the following components and main body ECU (multiplex network body ECU) stops.
1.CLEAR DTC

  1. Clear the DTC (Click here).


NEXT


2.CHECK FOR DTC

  1. Recheck for DTC (Click here).

    Result:
    Result
    		Proceed to
    DTC B1249 is output
    		A
    DTC B1249 is not output
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A


3.CHECK HARNESS AND CONNECTOR (DOUBLE LOCK CONTROL RELAY ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU]

  1. Disconnect the A main body ECU connector.

  1. Disconnect the E167 double lock control relay connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A-16 (LIN2) - E167-9 (MPX1)
    		Always
    		Below 1 Ω
    A-16 (LIN2) or E167-9 (MPX1) - Body ground
    		Always
    		10 kΩ or higher


NG
Go to step 7
OK


4.CHECK HARNESS AND CONNECTOR (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY VOLTAGE AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B1249 Double Locking Ecu Communication Stop

  1. Disconnect the E167 double lock control relay connector.

  1. Measure the resistance and voltage according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E167-7 (GND) - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E167-11 (CPUB) - Body ground
    		Always
    		11 to 14 V
    E167-12 (+B) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Double Lock Door Control Relay Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY

  1. Temporarily replace the double lock door control relay with a new or normally functioning one (Click here)*1, (Click here)*2.

    1. *1: for LHD
    2. *2: for RHD

  1. Clear the DTC (Click here).


NEXT


6.CHECK FOR DTC

  1. Recheck for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC B1249 is not output
    		A
    DTC B1249 is output (for LHD)
    		B
    DTC B1249 is output (for RHD)
    		C


B
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

C
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)
A

END (DOUBLE LOCK DOOR CONTROL RELAY IS DEFECTIVE)

7.CHECK HARNESS AND CONNECTOR (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY - COWL SIDE JUNCTION BLOCK LH

  1. Disconnect the 2J cowl side junction block LH connector.

  1. Disconnect the E167 double lock door control relay connector.

  1. Measure the resistance according to the value(s) in the tables below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2J-13 - E167-9 (MPX1)
    		Always
    		Below 1 Ω
    2J-13 or E167-9 (MPX1) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG
    		C


B
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)