Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001G2CA
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 08/2020]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): Automatic High Beam Switch Indicator does not Come ON; 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]

Automatic High Beam Switch Indicator does not Come ON

DESCRIPTION

When the automatic high beam system is on, the main body ECU (multiplex network body ECU) illuminates the auto high beam switch indicator.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • w/ Smart Key System:

    Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(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 / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Automatic High Beam Switch Light

Auto high beam switch indicator light

OFF or ON

-

Body Electrical > Main Body > Active Test

Tester Display

Automatic High Beam Switch Light

OK:

Auto high beam switch indicator light illuminates.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

INSPECT AUTO HIGH BEAM SWITCH

(a) Remove the auto high beam switch.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): AUTOMATIC HIGH BEAM MAIN SWITCH: REMOVAL

(b) Inspect the auto high beam switch.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): AUTOMATIC HIGH BEAM MAIN SWITCH: INSPECTION

NG

REPLACE AUTO HIGH BEAM SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - BATTERY)

(a) Disconnect the auto high beam switch connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G42-3 (IND) - Body ground

Ignition switch off

11 to 14 V

*a

Front view of wire harness connector

(to Auto High Beam Switch)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G42 auto high beam switch connector.

(b) Disconnect the G45 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

G42-4 (AZBI) - G45-21 (AHID)

Always

Below 1 Ω

G42-4 (AZBI) or G45-21 (AHID) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR