Lexus NX: CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION
This DTC is output when an internal malfunction of the CAN communication-related ECU is stored.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
U1000 | CAN Communication Failure (Message Registry) | A headlight ECU sub-assembly LH CAN communication function malfunction is detected | Headlight ECU sub-assembly LH |
CAUTION / NOTICE / HINT
NOTICE:
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.
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PROCEDURE
(a) Turn the power switch on (IG).
(b) Check for DTCs.
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Body Electrical > AFS > Trouble Codes
OK:
DTC U1000 is not output.
NG | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
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DESCRIPTION The main body ECU (multiplex network body ECU) receives light control switch signals, dimmer switch signals, fog light switch signals from the headlight dimmer switch. WIRING DIAGRAM CAUT
DESCRIPTION The illumination of the daytime running light (clearance light assembly) or clearance light is controlled by the headlight ECU sub-assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
SEE MORE:
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Note U023587 Lost Communication with Cruise Control Front Distance Range Sensor Missing Message
The power switch is on (IG)
A communication malfunction with the millimeter wave radar
INSPECTION PROCEDURE 1. INSPECT FOG LIGHT ASSEMBLY LH (a) Apply battery voltage to the connector and check the light illumination condition. OK: Condition Specified Condition Battery positive (+) → 2 (B) Battery negative (-) → 1 (E) Illuminates If the result is not as specified
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