Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM10000000215N0
Model Year Start: 2022 Model: RAV4 Prod Date Range: [12/2021 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM: B2430,B2431; LED Headlight LH; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]

DTC

B2430

LED Headlight LH

DTC

B2431

LED Headlight RH

DESCRIPTION

These DTCs are stored when the low beam headlights do not illuminate, or a communication malfunction is detected between the light control LED ECU and main body ECU (multiplex network body ECU).

HINT:

DTC B2430 or DTC B2431 may also be stored if a headlight cooling fan is malfunctioning. In this case, the light control LED ECU will dim or turn off the malfunctioning low beam headlight.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2430

LED Headlight LH

Detection condition:

  • All of the following conditions are met:
    • Ignition switch ON (READY)
    • Low beam headlights on

Malfunction Status:

  • Any of the following conditions is met:
    • Headlight assembly LH malfunction
    • Headlight assembly LH power source and signal malfunction

Malfunction Time:

  • 10 seconds or more
  • Headlight assembly LH
  • H-LP LH relay
  • Instrument panel junction block assembly
  • Main body ECU (multiplex network body ECU)
  • Harness or connector

Main Body

B2431

LED Headlight RH

Detection condition:

  • All of the following conditions are met:
    • Ignition switch ON (READY)
    • Low beam headlights on

Malfunction Status:

  • Any of the following conditions is met:
    • Headlight assembly RH malfunction
    • Headlight assembly RH power source and signal malfunction

Malfunction Time:

  • 10 seconds or more
  • Headlight assembly RH
  • H-LP RH relay
  • Main body ECU (multiplex network body ECU)
  • Harness or connector

Main Body

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

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 / Main Body / Clear DTCs.

(e) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON (READY).

(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(f) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B2430 and B2431 are not output.

Result

Proceed to

OK

A

NG (DTC B2430 is output)

B

NG (DTC B2431 is output)

C
A

USE SIMULATION METHOD TO CHECK

C

GO TO STEP 18

B

3.

CHECK VEHICLE TYPE

Result

Proceed to

Turn Light for Bulb Type

A

Turn Light for LED Type

B
B

GO TO STEP 13

A

4.

CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly LH connector.

*a

Front view of wire harness connector

(to Headlight Assembly LH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A99-1 (LO) - Body ground

Light control switch in HEAD position

11 to 14 V
NG

GO TO STEP 8

OK

5.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)

(a) Disconnect the headlight assembly LH connector.

*a

Front view of wire harness connector

(to Headlight Assembly LH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A99-6 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly LH connector.

*a

Front view of wire harness connector

(to Headlight Assembly LH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A99-4 (S) - Body ground

Ignition switch ON

11 to 14 V
OK

REPLACE HEADLIGHT ASSEMBLY LH

NG

7.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the A99 headlight assembly LH connector.

(b) Disconnect the G43 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A99-4 (S) - G43-14 (LLEW)

Always

Below 1 Ω

A99-4 (S) or G43-14 (LLEW) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)

(a) Remove the H-LP LH relay.

(b) Disconnect the A99 headlight assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (H-LP LH relay) - A99-1 (LO)

Always

Below 1 Ω

3 (H-LP LH relay) or A99-1 (LO) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

INSPECT H-LP LH RELAY

(a) Remove the H-LP LH relay.

(b) Inspect the H-LP LH relay.

Click here 2019 - 2024 MY RAV4 RAV4 HV [02/2019 -        ]; LIGHTING (EXT): RELAY: ON-VEHICLE INSPECTION

NG

REPLACE H-LP LH RELAY
OK

10.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP LH RELAY)

(a) Remove the H-LP LH relay.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

2 (H-LP LH relay) - Body ground

Ignition switch off

11 to 14 V

5 (H-LP LH relay) - Body ground

Ignition switch off

11 to 14 V

*a

Front view of wire harness connector

(to H-LP LH Relay)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

11.

CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Remove the H-LP LH relay.

(b) Disconnect the 4F instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (H-LP LH relay) - 4F-31

Always

Below 1 Ω

1 (H-LP LH relay) or 4F-31 - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the instrument panel junction block assembly.

Click here 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4F-31 - A-15 (HRLY)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

13.

CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly LH connector.

*a

Front view of wire harness connector

(to Headlight Assembly LH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A98-1 (LO) - Body ground

Light control switch in HEAD position

11 to 14 V
NG

GO TO STEP 17

OK

14.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)

(a) Disconnect the headlight assembly LH connector.

*a

Front view of wire harness connector

(to Headlight Assembly LH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A98-8 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

15.

CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly LH connector.

*a

Front view of wire harness connector

(to Headlight Assembly LH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A98-5 (S) - Body ground

Ignition switch ON

11 to 14 V
OK

REPLACE HEADLIGHT ASSEMBLY LH

NG

16.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the A98 headlight assembly LH connector.

(b) Disconnect the G43 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A98-5 (S) - G43-14 (LLEW)

Always

Below 1 Ω

A98-5 (S) or G43-14 (LLEW) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

17.

CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)

(a) Remove the H-LP LH relay.

(b) Disconnect the A98 headlight assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (H-LP LH relay) - A98-1 (LO)

Always

Below 1 Ω

3 (H-LP LH relay) or A98-1 (LO) - Body ground

Always

10 kΩ or higher
OK

GO TO STEP 9

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

18.

CHECK VEHICLE TYPE

Result

Proceed to

Turn Light for Bulb Type

A

Turn Light for LED Type

B
B

GO TO STEP 27

A

19.

CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly RH connector.

*a

Front view of wire harness connector

(to Headlight Assembly RH)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A97-1 (LO) - Body ground

Light control switch in HEAD position

11 to 14 V
NG

GO TO STEP 23

OK

20.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)

(a) Disconnect the headlight assembly RH connector.

*a

Front view of wire harness connector

(to Headlight Assembly RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A97-6 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

21.

INSPECT HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly RH connector.

*a

Front view of wire harness connector

(to Headlight Assembly RH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A97-4 (S) - Body ground

Ignition switch ON

11 to 14 V
OK

REPLACE HEADLIGHT ASSEMBLY RH

NG

22.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the A97 headlight assembly RH connector.

(b) Disconnect the G43 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A97-4 (S) - G43-15 (RLEW)

Always

Below 1 Ω

A97-4 (S) or G43-15 (RLEW) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

23.

CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)

(a) Remove the H-LP RH relay.

(b) Disconnect the A97 headlight assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (H-LP RH relay) - A97-1 (LO)

Always

Below 1 Ω

3 (H-LP RH relay) or A97-1 (LO) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

24.

INSPECT H-LP RH RELAY

(a) Remove the H-LP RH relay.

(b) Inspect the H-LP RH relay.

Click here 2019 - 2024 MY RAV4 RAV4 HV [02/2019 -        ]; LIGHTING (EXT): RELAY: ON-VEHICLE INSPECTION

NG

REPLACE H-LP RH RELAY
OK

25.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP RH RELAY)

(a) Remove the H-LP RH relay.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

2 (H-LP RH relay) - Body ground

Ignition switch off

11 to 14 V

5 (H-LP RH relay) - Body ground

Ignition switch off

11 to 14 V

*a

Front view of wire harness connector

(to H-LP RH Relay)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

26.

CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Remove the H-LP RH relay.

(b) Disconnect the G44 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (H-LP RH relay) - G44-12 (HRY2)

Always

Below 1 Ω

1 (H-LP RH relay) or G44-12 (HRY2) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

27.

CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly RH connector.

*a

Front view of wire harness connector

(to Headlight Assembly RH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A96-1 (LO) - Body ground

Light control switch in HEAD position

11 to 14 V
NG

GO TO STEP 31

OK

28.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)

(a) Disconnect the headlight assembly RH connector.

*a

Front view of wire harness connector

(to Headlight Assembly RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A96-8 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

29.

CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)

(a) Disconnect the headlight assembly RH connector.

*a

Front view of wire harness connector

(to Headlight Assembly RH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A96-5 (S) - Body ground

Ignition switch ON

11 to 14 V
OK

REPLACE HEADLIGHT ASSEMBLY LH

NG

30.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the A96 headlight assembly RH connector.

(b) Disconnect the G43 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A96-5 (S) - G43-14 (LLEW)

Always

Below 1 Ω

A96-5 (S) or G43-14 (LLEW) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

31.

CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY RH)

(a) Remove the H-LP RH relay.

(b) Disconnect the A96 headlight assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (H-LP RH relay) - A96-1 (LO)

Always

Below 1 Ω

3 (H-LP RH relay) or A96-1 (LO) - Body ground

Always

10 kΩ or higher
OK

GO TO STEP 24

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR