Dtc B1206 P/W Master Switch 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 (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY BATTERY AND BODY GROUND

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)

DTC B1206 P/W Master Switch Communication Stop


DESCRIPTION

This DTC is stored when LIN communication between the multiplex network master Switch assembly and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC Code
DTC Detection Condition
Trouble Area
B1206
No communication between multiplex network master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more.
  1. Multiplex network master switch 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 B1206 P/W Master Switch Communication Stop


INSPECTION PROCEDURE

NOTICE:
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.
HINT:
DTC B2325 is stored when the communication between the multiplex network master Switch assembly 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 DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC B1206 is output
    		A
    DTC B1206 is not output
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A


3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

  1. Disconnect the A main body ECU connector.

  1. Disconnect the I11*1 or I22*2 multiplex network master switch connector.

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

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    A-16 (LIN2) - I11-17 (LIN1)
    		Always
    		Below 1 Ω
    A-16 (LIN2) or I11-17 (LIN1) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    A-16 (LIN2) - I22-17 (LIN1)
    		Always
    		Below 1 Ω
    A-16 (LIN2) or I22-17 (LIN1) - Body ground
    		Always
    		10 kΩ or higher


NG
Go to step 7
OK


4.CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY BATTERY AND BODY GROUND


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B1206 P/W Master Switch Communication Stop

  1. Disconnect the I11*1 or I22*2 multiplex network master switch connector.

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

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    I11-12 (GND) - Body ground
    		Always
    		Below 1 Ω
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    I22-12 (GND) - Body ground
    		Always
    		Below 1 Ω

    Standard Voltage:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    I11-11 (B) - Body ground
    		Always
    		11 to 14 V
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    I22-11 (B) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *A
    		for LHD
    *B
    		for RHD
    *a
    		Front view of wire harness connector
    (to Master Switch)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

  1. Temporarily replace the multiplex network master switch with a new or normally functioning one (Click here).

  1. Clear the DTC (Click here).


NEXT


6.CHECK FOR DTC

  1. Recheck for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC B1206 is not output
    		A
    DTC B1206 is output (for LHD)
    		B
    DTC B1206 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 (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY IS DEFECTIVE)

7.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)

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

  1. Disconnect the I11*1 or I22*2 multiplex network master switch connector.

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

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    2J-13 - I11-17 (LIN1)
    		Always
    		Below 1 Ω
    2J-13 or I11-17 (LIN1) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    2J-13 - I22-17 (LIN1)
    		Always
    		Below 1 Ω
    2J-13 or I22-17 (LIN1) - 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)