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
(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 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 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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