Lexus ES: ECU Malfunction (B1003)
Lexus ES (XZ10) Service Manual / Power Source & Network / Networking / Can Communication System (for Gasoline Model) / 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 | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
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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
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CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION If DTC U1000 is stored frequently, duplicate the problem symptoms and perform troubleshooting again even if the DTC is not output when rechecking for DTCs. DTC No. Detection Item DTC Detection Condition Trouble Area U1000 CAN Communication Failure (Message Registry) ECU
Parts Location
PARTS LOCATION ILLUSTRATION *1 LUGGAGE DOOR OPENING CANCEL SWITCH ASSEMBLY *2 TRUNK AND FUEL SWITCH ASSEMBLY *3 LUGGAGE COMPARTMENT DOOR OPENING SWITCH *4 DLC3 *5 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *6 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-DCC NO. 2 FUSE
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