B124D

NETWORKING: LIN COMMUNICATION SYSTEM: B124D: Lost Communication with AFS LIN
B124D - Lost Communication with AFS LIN

DESCRIPTION

The DTC is stored when the main body ECU detects malfunctions in the LIN communication system.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.
* When using the Techstream with the ignition 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.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CLEAR DTC

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

NEXT -- Continue to next step.

2. CHECK FOR DTC

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result

B -- USE SIMULATION METHOD TO CHECK Initial Inspection and Diagnostic Overview
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (AFS ECU (HEADLIGHT SWIVEL COMPUTER ASSEMBLY) - INNER REAR VIEW MIRROR ASSEMBLY)

(a) Disconnect the A45 AFS ECU (headlight swivel computer assembly) connector.

(b) Disconnect the T2 inner rear view mirror assembly connector.

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

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

Text in Illustration

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

4. INSPECT AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

(a) Reconnect the A45 AFS ECU (headlight swivel computer assembly) connector.

(b) Connect an oscilloscope to the T2 inner rear view mirror assembly connector.

Text in Illustration

NG -- REPLACE INNER REAR VIEW MIRROR ASSEMBLY Removal

OK -- REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Removal