Dtc B2321 Driver Side Door 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 (MAIN BODY ECU - FRONT POWER WINDOW REGULATOR MOTOR)

CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (BATTERY VOLTAGE AND BODY GROUND)

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY

CHECK FOR DTC

DTC B2321 Driver Side Door ECU Communication Stop


DESCRIPTION

This DTC is stored when LIN communication between the front power window regulator motor LH*1 (RH*2) and main body ECU (cowl side junction block LH) stops for 10 seconds or more.
HINT:
  1. *1: for LHD
  2. *2: for RHD

DTC Code
DTC Detection Condition
Trouble Area
B2321
No communication between the front power window regulator motor LH*1 or RH*2 and main body ECU (cowl side junction block LH) for 10 seconds or more.
  1. Front power window regulator motor LH*1
  2. Front power window regulator motor RH*2
  3. Main body ECU (cowl side junction block LH)
  4. Harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B2321 Driver Side Door Ecu Communication Stop


INSPECTION PROCEDURE

NOTICE:
When using the intelligent tester with the ignition switch off to troubleshoot:
Connect the intelligent tester to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
HINT:
DTC B2325 is stored when the communication between the front power window regulator motor and main body ECU (cowl side junction block LH) 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 B2321 is output
    		A
    DTC B2321 is not output
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A


3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT POWER WINDOW REGULATOR MOTOR)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B2321 Driver Side Door Ecu Communication Stop

  1. Disconnect the E3 ECU connector.

  1. Disconnect the I12*1 or I4*2 motor connector.

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E3-10 (LIN2) - I12-9 (LIN)*1 or I4-9 (LIN)*2
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (BATTERY VOLTAGE AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B2321 Driver Side Door Ecu Communication Stop

  1. Disconnect the I12*1 or I4*2 motor connector.

    HINT:
    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:
    Tester Connection
    		Condition
    		Specified Condition
    I12-1 (GND)*1 or I4-1 (GND)*2 - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    I12-2 (B)*1 or I4-2 (B)*2 - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY

  1. Temporarily replace the front power window regulator motor LH*1 or RH*2 with a new or normally functioning one (Click here).

    HINT:
    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 B2321 is not output
    		A
    DTC B2321 is output
    		B


B
REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
A

END (FRONT POWER WINDOW REGULATOR MOTOR IS DEFECTIVE)