DTC U0422: Invalid Data Received From Body Control Module

DTC detecting condition:

When data error received from BIU is detected for 10 seconds (or 20 seconds) or 3 times.

Trouble symptom:

IGN off timer (mirror operation possible for approx. 45 seconds after IGN OFF) does not operate.

The following functions do not operate.

Automatic electric retraction function
Front door step light illumination
Mirror heater operation
Remote control mirror switch light illumination

NOTE: Perform the diagnosis for LAN system and BIU. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE . Ref. to BODY CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .