2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) B CODE Page 372

DESCRIPTION

If the communication line (EFIO - IMI) to the ID code box (immobiliser code ECU) is stuck high output (e. g. shorted to +B), the ECM stores this

DTC.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

If the ID code box (immobiliser code ECU) is replaced, register the ECU code and ECU communication ID See: Accessories and

Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/Engine Immobilizer

System.

PROCEDURE

1. CHECK DTC OUTPUT

(a) Clear the DTCs See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Reading and

Clearing Diagnostic Trouble Codes/Engine Immobiliser System.

(b) Recheck for DTCs See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Reading and

Clearing Diagnostic Trouble Codes/Engine Immobiliser System.

HINT

If any DTCs other than DTC B279A are output, troubleshoot those DTCs first.

Result:

B -- GO TO DIAGNOSTIC TROUBLE CODE CHART See: Diagnostic Trouble Code Descriptions/Engine Immobiliser System

A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (ID CODE BOX - ECM)

(a) Disconnect the ID code box (immobiliser code ECU) connector.

(b) Disconnect the ECM connector.