B2405

MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: B2405: Sub Bus LIN Module Communication Malfunction
B2405 - Sub Bus LIN Module Communication Malfunction

DESCRIPTION

This DTC is output when LIN communication between the luggage room junction block (rear junction block ECU) and map light assembly stops for 10 seconds or more.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When using the Techstream with the power 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 tester and vehicle begins.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - MAP LIGHT)





(a) Disconnect the S62 ECU connector.

(b) Disconnect the X6 Map light connector.

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

Standard resistance:





Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY AND BODY GROUND)

(a) Disconnect the X4 map light connector.





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

Standard resistance:





Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. REPLACE MAP LIGHT ASSEMBLY

(a) Temporarily replace the map light assembly with a new or normally functioning one Removal.

(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

4. CHECK FOR DTC

(a) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)

A -- END (MAP LIGHT ASSEMBLY IS DEFECTIVE)