Toyota Camry owners & service manuals

Toyota Camry (XV70): Rear Door RH ECU Communication Stop (B2323)

Toyota Camry Repair Manual XV70 (2018-2024) / Power Source, Network / Networking / Lin Communication System / Rear Door RH ECU Communication Stop (B2323)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2323

Rear Door RH ECU Communication Stop

No communication between power window regulator motor assembly (for rear door RH) and main body ECU (multiplex network body ECU) for 10 seconds or more.
  • Main body ECU (multiplex network body ECU)
  • Instrument panel junction block assembly
  • Power window regulator motor assembly (for Rear Door RH)
  • Wire harness or connector
  • DOOR R/R fuse

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*

    Click here

  • *: w/ Smart Key System

PROCEDURE

1.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

Click here

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

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

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

HINT:

This inspection is to check the LIN communication 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

3D-25 - MB-16 (LIN2)

Always

Below 1 Ω
NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

2.

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear Door RH))

(a) Disconnect the P6 power window regulator motor assembly (for rear door RH) connector.

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

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3D-25 - P6-9 (LIN)

Ignition switch off

Below 1 Ω

P6-9 (LIN) or 3D-25 - Body ground

Ignition switch off

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear Door RH) - BATTERY, BODY GROUND)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

P6-2 (B) - P6-1 (GND)

Always

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P6-1 (GND) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear Door RH)

(a) Replace the power window regulator motor assembly (for rear door RH).

Click here

NEXT

5.

CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B2323 is not output.

OK

END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear Door RH) WAS DEFECTIVE)
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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