Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: ECU Malfunction (B1003)
DESCRIPTION
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B1003 | ECU Malfunction | The network gateway ECU detects an internal malfunction. | 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 network gateway ECU (Techstream display: Central Gateway) | A |
| DTC B1003 is output from the network gateway ECU (Techstream display: Central Gateway) | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE 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 Note Link B1003 ECU Malfunction Network gateway ECU - U0199 Lost Communi ...
Lost Communication with "Door Control Module B" (U0200)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Note U0200 Lost Communication with "Door Control Module B" No communication from the outer mirror control ECU ...
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Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual > Steps to take in
an emergency: If the 12-volt battery is
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The following procedures may be used to start the hybrid system if the
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You can also call your Lexus dealer or a qualified repair shop.
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Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Seat Belt Warning System: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the seat belt warning system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS (a) Interview the customer to confirm the problem. Clic ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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