Lexus NX: Right Headlight ECU Malfunction (B242C,B242D)

DESCRIPTION

These DTCs are output when an internal malfunction in the headlight ECU sub-assembly occurs.

The headlight ECU sub-assembly LH outputs DTC B242C and B242D.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B242C

Right Headlight ECU Malfunction

Headlight ECU sub-assembly RH malfunction

Headlight ECU sub-assembly RH

B242D

Left Headlight ECU Malfunction

Headlight ECU sub-assembly LH malfunction

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.

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

Result

Proceed to

DTCs B242C and B242D are not output

A

DTC B242C is output

B

DTC B242D is output

C

A

USE SIMULATION METHOD TO CHECK

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

C

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

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