DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [08/2019 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for Multiple Beam Headlight	A
   for Single Beam Headlight	B

Result: 

B 

See step  4

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > AFS > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Wait for at least maximum 15 minutes.
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical / AFS / Trouble Codes.
6. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   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 [08/2019 - 07/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

Result: 

B 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [08/2019 - ] 

Result: 

C 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [08/2019 - ] 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Wait for at least maximum 15 minutes.
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.
6. Check for DTCs.

   Body Electrical > HL AutoLeveling > Trouble Codes 

   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 [08/2019 - 07/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

Result: 

B 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [08/2019 - ] 

Result: 

C 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [08/2019 - ]