Toyota 4Runner manuals

Toyota 4Runner: Lost Communication with Back Door Power Window ECU (Abnormal Power Supply) (B2327,B2328)

Toyota 4Runner Service Manual / Power Source / Network / Networking / Lin Communication System / Lost Communication with Back Door Power Window ECU (Abnormal Power Supply) (B2327,B2328)

DESCRIPTION

  • DTC B2327 is stored when LIN communication between the multiplex network door ECU (back door P/W) and back door power window regulator motor assembly stops for 10 seconds or more.
  • DTC B2328 is stored when a malfunction in the LIN communication bus between the multiplex network door ECU (back door P/W) and back door power window regulator motor assembly is detected consecutively 3 times.

    DTC Code

    DTC Detection Condition

    Trouble Area

    B2327

    No communication between the multiplex network door ECU (back door P/W) and back door power window regulator motor assembly for 10 seconds or more.

    • Multiplex network door ECU (back door P/W)
    • Back door power window regulator motor assembly
    • Harness or connector

    B2328

    The multiplex network door ECU (back door P/W) detects a malfunction in the LIN communication bus between the multiplex network door ECU (back door P/W) and back door power window regulator motor assembly consecutively 3 times.

    • Multiplex network door ECU (back door P/W)
    • Back door power window regulator motor assembly
    • Harness or connector

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the ignition switch off to troubleshoot:

Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs (See page ).



NEXT

2.

CHECK FOR DTC

(a) Check for DTCs (See page ).


OK:

DTC B2327 or B2328 is not output.


OK

USE SIMULATION METHOD TO CHECK


NG

3.

CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - BACK DOOR POWER WINDOW REGULATOR MOTOR)

(a) Disconnect the W10 multiplex network door ECU (back door P/W) connector.

(b) Disconnect the W9 back door power window regulator motor assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

W10-11 (MPX2) - W9-9 (LIN)

Always

Below 1 Ω

W10-6 (BDR2) - W9-2 (B)

Always

Below 1 Ω

W10-1 (E4) - W9-1 (GND)

Always

Below 1 Ω

W10-1 (E4) - Body ground

Always

Below 1 Ω

W9-1 (GND) - Body ground

Always

Below 1 Ω

W10-11 (MPX2) or W9-9 (LIN) - Body ground

Always

10 kΩ or higher

W10-6 (BDR2) or W9-2 (B) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

REPLACE BACK DOOR POWER WINDOW REGULATOR MOTOR ASSEMBLY

(a) Temporarily replace the back door power window regulator motor assembly with a new or normally functioning one (See page ).



NEXT

5.

CLEAR DTC

(a) Clear the DTCs (See page ).



NEXT

6.

CHECK FOR DTC

(a) Check for DTCs (See page ).


OK:

DTC B2327 or B2328 is not output.


OK

END (BACK DOOR POWER WINDOW REGULATOR MOTOR IS DEFECTIVE)


NG

REPLACE MULTIPLEX NETWORK DOOR ECU

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