B2321

NETWORKING: LIN COMMUNICATION SYSTEM: B2321: Driver Side Door ECU Communication Stop
B2321 - Driver Side Door ECU Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the front power window regulator motor LH and main body ECU stops for 10 seconds or more.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* 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.

HINT
DTC B2325 is stored when the communication between the front power window regulator motor assembly LH and main body ECU stops.

PROCEDURE

1. CLEAR DTC

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

NEXT -- Continue to next step.

2. CHECK FOR DTC

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

Result





HINT
* When both B1206 and B2321 are output at the same time, troubleshoot B1206 first.
* When both B1206 and B2325 are output at the same time, troubleshoot B2325 first.

B -- GO TO DIAGNOSTIC TROUBLE CODE CHART LIN Communication System
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH)





(a) Disconnect the H8 multiplex network master switch assembly connector.

(b) Disconnect the H1 front door window regulator motor assembly LH connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Standard Voltage:





Text in Illustration





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

4. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY LH - BATTERY AND BODY GROUND)

(a) Disconnect the H1 power window regulator motor assembly LH connector.





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

Standard Resistance:





Standard Voltage:





Text in Illustration





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

5. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

(a) Temporarily replace the front power window regulator motor assembly LH with a new or normally functioning one Removal.

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

NEXT -- Continue to next step.

6. CHECK FOR DTC

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

Result





B -- REPLACE MAIN BODY ECU Removal

A -- END (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH IS MALFUNCTIONING)