Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001G2BY
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 12/2021]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): B243D,B243E; Left Low Beam Fan Malfunction; 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 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:
    • Ignition switch ON
    • 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 LED unit assembly LH
  • Headlight unit assembly LH
  • Headlight ECU sub-assembly LH

HL AutoLeveling

for Single Beam Headlight

B243E

Right Low Beam Fan Malfunction

Detection condition:

  • All of the following conditions are met:
    • Ignition switch ON
    • 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 LED unit assembly RH
  • Headlight unit assembly RH
  • Headlight ECU sub-assembly RH

HL AutoLeveling (Sub)

for Single Beam Headlight

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 [11/2018 - 12/2021]; LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): INITIALIZATION

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(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 / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

Body Electrical > HL AutoLeveling (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 5

B

3.

INSPECT HEADLIGHT UNIT ASSEMBLY LH

*a

Component without harness connected

(to Headlight ECU Sub-assembly LH)

*b

Component without harness connected

(to Headlight LED Unit Assembly LH)

(a) Remove the headlight assembly LH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL

(b) Remove the headlight LED unit assembly LH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Wiring Color

Condition

Specified Condition

B-6 (FANB) - C-2

G

Always

Below 1 Ω

B-15 (FANP) - C-8

L

Always

Below 1 Ω

B-14 (FANG) - C-7

Y

Always

Below 1 Ω
NG

REPLACE HEADLIGHT UNIT ASSEMBLY LH 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

OK

4.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH

*a

Component without harness connected

(to Headlight LED Unit Assembly LH)

(a) Remove the headlight assembly LH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL

(b) Remove the headlight LED unit assembly LH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

(c) Connect the B headlight ECU sub-assembly LH connector.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Wiring Color

Condition

Specified Condition

C-2 - C-7

G - Y

Low beam headlights on

4.75 to 5.25 V

C-8 - C-7

L - Y

Low beam headlights on

4.75 to 5.25 V
OK

REPLACE HEADLIGHT LED UNIT ASSEMBLY LH 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

5.

INSPECT HEADLIGHT UNIT ASSEMBLY RH

*a

Component without harness connected

(to Headlight ECU Sub-assembly RH)

*b

Component without harness connected

(to Headlight LED Unit Assembly RH)

(a) Remove the headlight assembly RH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL

(b) Remove the headlight LED unit assembly RH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Wiring Color

Condition

Specified Condition

B-6 (FANB) - C-2

G

Always

Below 1 Ω

B-15 (FANP) - C-8

L

Always

Below 1 Ω

B-14 (FANG) - C-7

Y

Always

Below 1 Ω
NG

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

OK

6.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH

*a

Component without harness connected

(to Headlight LED Unit Assembly RH)

(a) Remove the headlight assembly RH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): REMOVAL

(b) Remove the headlight LED unit assembly RH.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

(c) Connect the B headlight ECU sub-assembly RH connector.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Wiring Color

Condition

Specified Condition

C-2 - C-7

G - Y

Low beam headlights on

4.75 to 5.25 V

C-8 - C-7

L - Y

Low beam headlights on

4.75 to 5.25 V
OK

REPLACE HEADLIGHT LED UNIT ASSEMBLY RH 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY(for Single Beam Headlight): DISASSEMBLY 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

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL