Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001H3X5
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 - 12/2021]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): B243D,B243E; Left Low Beam Fan Malfunction; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

DTC

B243D

Left Low Beam Fan Malfunction

DTC

B243E

Right Low Beam Fan Malfunction

DESCRIPTION

The headlight ECU sub-assembly operates the low beam fan to cool the headlight LED unit in order to prevent the headlight LED unit from overheating.

Illuminates the low beam headlights and continuously operates the low beam fan.

The headlight ECU sub-assembly monitors the pulse signals from the FANP terminal when the low beam fans are operating.

HINT:

If B243D or B243E is output, the headlight ECU sub-assembly performs low beam headlight dimming control.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Note

B243D

Left Low Beam Fan Malfunction

Detection condition:

  • All of the following conditions are met:
    • Power switch on (IG)
    • Low beam headlights on

Malfunction status:

  • Fan speed signals from the low beam fan of less than 2900 rpm are continuously detected

Malfunction duration:

  • 30 seconds or more
  • Headlight unit assembly LH
  • Headlight ECU sub-assembly LH

AFS

-

B243E

Right Low Beam Fan Malfunction

Detection condition:

  • All of the following conditions are met:
    • Power switch on (IG)
    • Low beam headlights on

Malfunction status:

  • Fan speed signals from the low beam fan of less than 2900 rpm are continuously detected

Malfunction duration:

  • 30 seconds or more
  • Headlight unit assembly RH
  • Headlight ECU sub-assembly RH

AFS (Sub)

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): INITIALIZATION

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs

Body Electrical > AFS (Sub) > Clear DTCs

NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Operate the light control switch to turn on the low beam headlights and wait 30 seconds or more.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > AFS > Trouble Codes

Body Electrical > AFS (Sub) > Trouble Codes

OK:

DTC B243D and B243E are not output.

Result

Proceed to

OK

A

NG (DTC B243D is output)

B

NG (DTC B243E is output)

C
A

USE SIMULATION METHOD TO CHECK

C

GO TO STEP 6

B

3.

CHECK HEADLIGHT UNIT ASSEMBLY LH

(a) Interchange the headlight unit assembly LH with RH and connect the connectors.

Click here 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY

NEXT

4.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Clear DTCs.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs

Body Electrical > AFS (Sub) > Clear DTCs

NEXT

5.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Operate the light control switch to turn on the low beam headlights and wait 30 seconds or more.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > AFS > Trouble Codes

Body Electrical > AFS (Sub) > Trouble Codes

Result

Proceed to

DTC B243D is output

A

DTC B243E is output

B
A

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

B

REPLACE HEADLIGHT UNIT ASSEMBLY LH 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY

6.

CHECK HEADLIGHT UNIT ASSEMBLY RH

(a) Interchange the headlight unit assembly RH with LH and connect the connectors.

Click here 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY

NEXT

7.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Clear DTCs.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs

Body Electrical > AFS (Sub) > Clear DTCs

NEXT

8.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Operate the light control switch to turn on the low beam headlights and wait 30 seconds or more.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > AFS > Trouble Codes

Body Electrical > AFS (Sub) > Trouble Codes

Result

Proceed to

DTC B243E is output

A

DTC B243D is output

B
A

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

B

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY