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DTC    B2323    Rear Door RH ECU Communication Stop

for Preparation Click here


DESCRIPTION

This DTC is stored when LIN communication between the power window regulator motor assembly (for rear RH side) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.
DTC Detection Condition
Trouble Area
B2323
No communication between power window regulator motor assembly (for rear RH side) and main body ECU (multiplex network body ECU) for 10 seconds or more.
  1. Power window regulator motor assembly (for rear RH side)
  2. Main body ECU (multiplex network body ECU)
  3. Instrument panel junction block assembly
  4. Wire harness or connector
  5. DOOR RR fuse

WIRING DIAGRAM


B220667E30


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  2. When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization (Click here).
  3. When using the intelligent tester to troubleshoot with the power switch off:
    Connect the intelligent tester to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the intelligent tester and vehicle begins.

1.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


  1. Remove the instrument panel junction block assembly (Click here).


    B217444E04

  1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

    HINT:
    This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2A-27 (LIN2) - MB-16 (LIN2)
    		Always
    		Below 1 Ω
    2A-27 (LIN2) - Body ground
    		Always
    		10 kΩ or higher


    Text in Illustration 
    *1
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)
    		*2
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (Click here)
OK


2.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - POWER WINDOW REGULATOR MOTOR)


    B228556E04

  1. Disconnect the P4 power window regulator motor assembly (for rear RH side) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2A-27 (LIN2) - P4-9 (LIN)
    		Always
    		Below 1 Ω
    2A-27 (LIN2) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Instrument Panel Junction Block Assembly)
    *2
    		Front view of wire harness connector
    (to Power Window Regulator Motor Assembly (for Rear RH Side))



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR - BATTERY, BODY GROUND)


    B133286E25

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    P4-2 (B) - Body ground
    		Power switch off
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P4-1 (GND) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Power Window Regulator Motor Assembly (for Rear RH Side))



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.REPLACE POWER WINDOW REGULATOR MOTOR (for REAR RH SIDE)

  1. Replace the power window regulator motor assembly (for rear RH side) (Click here).


NEXT


5.CHECK DTC OUTPUT

  1. Clear the DTC (Click here).

  1. Check for DTCs.

    OK:
    DTC B2323 is not output.



NG
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)
OK

END (POWER WINDOW REGULATOR MOTOR ASSEMBLY WAS DEFECTIVE)