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Last Modified: 11-27-2007 1.6 C
Service Category: Power Source/Network Section: Networking
Model Year: 2008 Model: LX570 Doc ID: RM000002S8I00CX
Title: NETWORKING: LIN COMMUNICATION SYSTEM: DESCRIPTION (2008 LX570)

DTC

B2325

LIN Communication Bus Malfunction

DESCRIPTION

The main body ECU (cowl side junction block LH) intermittently monitors the LIN communication bus between the components related to the door and sliding roof. DTC B2325 is stored when a malfunction in the LIN communication bus between the components related to the door and sliding roof is detected consecutively 3 times.

DTC Code

DTC Detection Condition

Trouble Area

B2325

The main body ECU (cowl side junction block LH) detects a malfunction in the LIN communication bus between components related to the doors and sliding roof consecutively 3 times.
  • Master switch
  • Front power window regulator motor LH
  • Front power window regulator motor RH
  • Rear power window regulator motor LH
  • Rear power window regulator motor RH
  • Sliding roof ECU
  • Main body ECU (cowl side junction block LH)
  • Harness or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

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

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

HINT:

When DTC B2325 and a LIN communication stop DTC are output simultaneously, first perform the troubleshooting for the LIN communication stop DTC. Then perform the troubleshooting for DTC B2325.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTC NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

NEXT

2.

CHECK FOR DTC

(a) Recheck for DTCs NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A

3.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)


(a) Disconnect the E3 and R5 ECU connectors.

(b) Disconnect the I4, I12, J4 and J11 motor connectors.

(c) Disconnect the I11 switch connector.

(d) Measure the resistance and voltage according to the value(s) in the tables below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

E3-10 (LIN2) - I11-17 (LIN1)

Always

Below 1 Ω

E3-10 (LIN2) - Body ground

Always

10 kΩ or higher

Standard Voltage:

Tester Connection

Condition

Specified Condition

E3-10 (LIN2) - Body ground

Always

Below 1 V
OK

4.

CLEAR DTC

(a) Reconnect the E3 ECU connector.

(b) Disconnect the I11 master switch connector.

(c) Reconnect I4, I12, J4 and J11 motor connectors.

(d) Reconnect the R5 gear connector.

(e) Clear the DTC NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

NEXT

5.

CHECK FOR DTC

(a) Recheck for DTCs NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A

6.

CLEAR DTC

(a) Reconnect the I11 switch connector.

(b) Disconnect the I12 motor connector.

(c) Clear the DTC NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

NEXT

7.

CHECK FOR DTC

(a) Recheck for DTCs NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A

8.

CLEAR DTC

(a) Reconnect the I12 motor connector.

(b) Disconnect the I4 motor connector.

(c) Clear the DTC NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

NEXT

9.

CHECK FOR DTC

(a) Recheck for DTCs NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A

10.

CLEAR DTC

(a) Reconnect the I4 motor connector.

(b) Disconnect the J4 motor connector.

(c) Clear the DTC NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

NEXT

11.

CHECK FOR DTC

(a) Recheck for DTCs NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A

12.

CLEAR DTC

(a) Reconnect the J4 motor connector.

(b) Disconnect the J11 motor connector.

(c) Clear the DTC NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

NEXT

13.

CHECK FOR DTC

(a) Recheck for DTCs NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A

14.

CLEAR DTC

(a) Reconnect the J11 motor connector.

(b) Disconnect the R5 gear connector.

(c) Clear the DTC NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

NEXT

15.

CHECK FOR DTC

(a) Recheck for DTCs NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A