Lexus NX: Vehicle Specifications have not been Stored (B2451)

Lexus NX Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System (for Triple Beam Headlight) / Vehicle Specifications have not been Stored (B2451)

DESCRIPTION

This DTC is output if the vehicle variation information is not written to the headlight ECU sub-assembly LH.

The headlight ECU sub-assembly LH outputs DTC B2451.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2451

Vehicle Specifications have not been Stored

Vehicle specification information not written

Headlight ECU sub-assembly LH

CAUTION / NOTICE / HINT

NOTICE:

After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.

Click here

PROCEDURE

1.

VEHICLE INFORMATION HEADLIGHT ECU SUB-ASSEMBLY LH

(a) Register vehicle information for the headlight ECU sub-assembly LH.

Click here

NEXT

2.

CHECK FOR DTC

(a) Clear the DTCs.

Click here

Body Electrical > AFS > Clear DTCs

(b) Turn the power switch on (IG).

(c) Check for DTCs.

Click here

Body Electrical > AFS > Trouble Codes

OK:

DTC B2451 output does not occur.

OK

END (NORMAL AFTER VEHICLE INFORMATION REGISTERED)

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

READ NEXT:

 Right Headlight ECU Variation Error (B2455)

DESCRIPTION This DTC is output when a headlight ECU sub-assembly RH that is incompatible with the vehicle is installed. The headlight ECU sub-assembly LH outputs DTC B2455. DTC No. Detection Item

 Left Headlight ECU Variation Error (B2456)

DESCRIPTION This DTC is output when a headlight ECU sub-assembly LH that is incompatible with the vehicle is installed. The headlight ECU sub-assembly LH outputs DTC B2456. DTC No. Detection Item

 Control Module Communication Bus "A" Off (U0073,U0100,U0101,U0126,U0129,U0142,U0155,U0293)

DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area U0073 Control Module Communication Bus "A" Off Bus off condition is detected. CAN communication system U0

SEE MORE:

 Terminals Of Ecu

TERMINALS OF ECU CHECK 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 I183-3 (SIG-) - I183-20 (E) G - W-B Ground Alway

 Components

COMPONENTS ILLUSTRATION *A w/ Wireless Charger *B w/o Wireless Charger *1 CONSOLE BOX ASSEMBLY *2 CONSOLE BOX ILLUMINATION LIGHT ASSEMBLY *3 CONSOLE COMPARTMENT DOOR SUB-ASSEMBLY *4 REAR CONSOLE END PANEL SUB-ASSEMBLY

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