DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [03/2017 - ]: Procedure

CHECK FOR DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [03/2017 - 05/2023] , or refer to DTC CHECK / CLEAR [05/2023 - ]

Body Electrical > HL AutoLeveling > Clear DTCs

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
Turn the engine switch on (IG) and wait for at least maximum 15 minutes.

Check for DTCs.

Refer to DTC CHECK / CLEAR [03/2017 - 05/2023] , or refer to DTC CHECK / CLEAR [05/2023 - ]

Body Electrical > HL AutoLeveling > Trouble Codes

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

OK

DTC B242C and B242D are not output.

Result

Result	Proceed to
OK	A
NG (DTC B242C is output)	B
NG (DTC B242D is output)	C

Result:

A

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 04/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2020 - 05/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2023 - ]

Result:

B

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

Result:

C

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]