Lexus NX: ECU Malfunction (B1003)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B1003

ECU Malfunction

A malfunction in the non-volatile storage of the central gateway ECU (network gateway ECU) is detected.

Central gateway ECU (network gateway ECU)

Central gateway ECU (network gateway ECU)

PROCEDURE

1.

RECONFIRM DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Central Gateway / Trouble Codes.

Body Electrical > Central Gateway > Trouble Codes

Result

Proceed to

DTC B1003 is not output from the central gateway ECU (network gateway ECU) (Techstream display: Central Gateway)

A

DTC B1003 is output from the central gateway ECU (network gateway ECU) (Techstream display: Central Gateway)

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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SEE MORE:

 Inspection

INSPECTION PROCEDURE 1. INSPECT MAP LIGHT ASSEMBLY (PERSONAL LIGHT) (a) Inspect the front map light. (1) Apply battery voltage to the connector and check the light illumination condition. OK: Measurement Condition Condition Specified Condition Battery positive (+) → T6 - 4 (+B1) Bat

 Terminals Of Ecu

TERMINALS OF ECU DCM (TELEMATICS TRANSCEIVER) Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition I183-1 (+B) - I183-20 (E) Y - W-B Power source (+B) Power switch off 11 to 14 V I183-20 (E) - Body ground W-B - Body ground Ground Alw

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