Dtc B2321 Driver Side Door Ecu Communication Stop


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - FRONT POWER WINDOW REGULATOR MOTOR)

CHECK HARNESS AND CONNECTOR (FRONT POWER WINDOW REGULATOR MOTOR - BATTERY AND BODY GROUND)

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY

CLEAR DTC

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 assembly LH*1 or RH*2 and main body ECU (main body ECU) stops for 10 seconds or more.
  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 assembly LH*1 or RH*2 and main body ECU (main body ECU) for 10 seconds or more.
  1. Front power window regulator motor assembly LH*1
  2. Front power window regulator motor assembly RH*2
  3. Main body ECU (main body ECU)
  4. Harness or connector
  1. *1: for LHD
  2. *2: for RHD

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc B2321 Driver Side Door Ecu Communication Stop


INSPECTION PROCEDURE

NOTICE:
  1. When using the intelligent tester with the ignition switch off to troubleshoot:
    Connect the intelligent tester to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
  2. Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
HINT:
  1. When communication between the front power window regulator motor assembly LH*1 or RH*2 and main body ECU (multiplex network body ECU) stops, DTC B2325 is also stored.
  2. When DTC B1206 and B2321 are output simultaneously, perform troubleshooting for DTC B1206 first.
  1. *1: for LHD
  2. *2: for RHD
1.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000002S8D045X.html).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000002S8D045X.html).

    OK:
    DTC B2321 is not output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

3.CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - FRONT POWER WINDOW REGULATOR MOTOR)
  1. *1: for LHD
  2. *2: for RHD

  1. Disconnect the K4*1 or J9*2 multiplex network master switch assembly connector.

  1. Disconnect the K7*1 or J7*2 front power window regulator motor assembly connector.

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

    Standard Resistance:
    for LHD:
    Tester Connection
    		Condition
    		Specified Condition
    K4-16 (LIN2) - K7-9 (LIN)
    		Always
    		Below 1 Ω
    K4-16 (LIN2) or K7-9 (LIN) - Body ground
    		Always
    		10 kΩ or higher
    for RHD:
    Tester Connection
    		Condition
    		Specified Condition
    J9-16 (LIN2) - J7-9 (LIN)
    		Always
    		Below 1 Ω
    J9-16 (LIN2) or J7-9 (LIN) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (FRONT POWER WINDOW REGULATOR MOTOR - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc B2321 Driver Side Door Ecu Communication Stop

  1. Disconnect the K7*1 or J7*2 front power window regulator motor assembly connector.

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

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

    Standard Resistance:
    for LHD:
    Tester Connection
    		Condition
    		Specified Condition
    K7-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    for RHD:
    Tester Connection
    		Condition
    		Specified Condition
    J7-1 (GND) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    for LHD:
    Tester Connection
    		Condition
    		Specified Condition
    K7-2 (B) - Body ground
    		Always
    		11 to 14 V
    for RHD:
    Tester Connection
    		Condition
    		Specified Condition
    J7-2 (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 Front Power Window Regulator Motor Assembly)


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 assembly LH*1 or RH*2 with a new or normally functioning one (LandCruiser RM0000011QF0H4X.html).

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

NEXT


6.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000002S8D045X.html).


NEXT


7.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000002S8D045X.html).

    OK:
    DTC B2321 is not output.


NG
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)
OK

END (FRONT POWER WINDOW REGULATOR MOTOR IS DEFECTIVE)