DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [10/2018 - ]: Procedure

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

   Body Electrical > AFS > Clear DTCs 

   Body Electrical > AFS (Sub) > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Operate the light control switch to turn on the low beam headlights and wait 120 seconds or more.
2. Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
3. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   Body Electrical > AFS (Sub) > Trouble Codes 

   OK

   DTC B243D and B243E are not output.

   Result

   Result	Proceed to
   OK	A
   NG (DTC B243D is output)	B
   NG (DTC B243E is output)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

C 

See step  6

Result: 

B 

See step  3

1. Interchange the headlight unit LH with RH and connect the connectors.

   Refer to DISASSEMBLY [10/2018 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

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

   Body Electrical > AFS > Clear DTCs 

   Body Electrical > AFS (Sub) > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Operate the light control switch to turn on the low beam headlights and wait 120 seconds or more.
2. Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
3. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   Body Electrical > AFS (Sub) > Trouble Codes 

   Result

   Result	Proceed to
   DTC B243D is output	A
   DTC B243E is output	B

Result: 

A 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [10/2018 - ] 

Result: 

B 

REPLACE HEADLIGHT UNIT LH. Refer to  DISASSEMBLY [10/2018 - ] 

1. Interchange the headlight unit RH with LH and connect the connectors.

   Refer to DISASSEMBLY [10/2018 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

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

   Body Electrical > AFS > Clear DTCs 

   Body Electrical > AFS (Sub) > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Operate the light control switch to turn on the low beam headlights and wait 120 seconds or more.
2. Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
3. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   Body Electrical > AFS (Sub) > Trouble Codes 

   Result

   Result	Proceed to
   DTC B243E is output	A
   DTC B243D is output	B

Result: 

A 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [10/2018 - ] 

Result: 

B 

REPLACE HEADLIGHT UNIT RH. Refer to  DISASSEMBLY [10/2018 - ]