Lexus ES manuals

Lexus ES: ECU Malfunction (B1003)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

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)

-

PROCEDURE

1.

RECONFIRM DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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)

A

DTC B1003 is output from the central gateway ECU (network gateway ECU)

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

READ NEXT:

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Diagnostic Trouble Code Chart DTC No. Detection Item Trouble Area Link B1003 ECU Malfunction Central gateway ECU (network gateway ECU)

 Data List / Active Test

DATA LIST / ACTIVE TEST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faul

 Fail-safe Chart

FAIL-SAFE CHART FAIL-SAFE FUNCTION (a) When communication fails in any of the CAN bus lines (communication lines), a fail-safe function(s) will operate. The fail-safe function that is specified for ea

SEE MORE:

 Air Conditioning Amplifier Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Air Conditioning Amplifier Communication Stop Mode Any of the following conditions are met: Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the Techstream. Click here Com

 Intermediate Shaft Speed Sensor "A" Circuit Short to Battery (P079112,P079114,P079131)

DESCRIPTION The transmission revolution sensor (NC) detects the rotation speed of the counter gear which shows the output shaft speed of automatic transaxle assembly. Based on the transmission revolution sensor (NC) signal and the transmission revolution sensor (NT) signal, the ECM controls engine t

© 2016-2024 Copyright www.lexguide.net