Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001G2CC
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 12/2021]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): Headlight Dimmer Switch Circuit; 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]

Headlight Dimmer Switch Circuit

DESCRIPTION

The steering sensor receives the following switch information:

  • Light control switch in OFF, TAIL, HEAD, AUTO position
  • Dimmer switch in High, Low or Flash (pass) position
  • Fog light switch in Fr* or OFF position
    • *: w/ Front Fog Light

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

w/ Smart Key System:

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

PROCEDURE

1.

READ VALUE 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: Chassis / Steering Angle Sensor / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Steering Angle Sensor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Light OFF Switch

Light control switch OFF position signal

OFF or ON

OFF: Light control switch not in OFF position

ON: Light control switch in OFF position

-

Auto Light Switch

Light control switch AUTO position signal

OFF or ON

OFF: Light control switch not in AUTO position

ON: Light control switch in AUTO position

-

Head Light Switch (Tail)

Light control switch TAIL position signal

OFF or ON

OFF: Light control switch not in TAIL position

ON: Light control switch in TAIL position

-

Head Light Switch (Head)

Light control switch HEAD position signal

OFF or ON

OFF: Light control switch not in HEAD position

ON: Light control switch in HEAD position

-

High Beam Main Switch

Dimmer switch High position signal

OFF or ON

OFF: Dimmer switch not in High position

ON: Dimmer switch in High position

-

Passing Light Switch

Dimmer switch Flash position (pass) signal

OFF or ON

OFF: Dimmer switch not in Flash position

ON: Dimmer switch in Flash position

-

Front Fog Light Switch

Front fog light switch signal*

OFF or ON

OFF: Fog light switch in OFF position

ON: Fog light switch in Fr position

-

  • *: w/ Front Fog Light

Chassis > Steering Angle Sensor > Data List

Tester Display

Light OFF Switch

Auto Light Switch

Head Light Switch (Tail)

Head Light Switch (Head)

High Beam Main Switch

Passing Light Switch

Front Fog Light Switch

OK:

Normal conditions listed above are displayed.

NG

GO TO STEP 7

OK

2.

READ VALUE 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:

(1) Chassis / Steering Angle Sensor / Data List.

(2) Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Steering Angle Sensor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Head Light Switch (Head)

Light control switch HEAD position signal

OFF or ON

OFF: Light control switch not in HEAD position

ON: Light control switch in HEAD position

-

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Head Light SW (Head)

Light control switch HEAD position signal

OFF or ON

OFF: Light control switch not in HEAD position

ON: Light control switch in HEAD position

-

Chassis > Steering Angle Sensor > Data List

Tester Display

Head Light Switch (Head)

Body Electrical > Main Body > Data List

Tester Display

Head Light SW (Head)

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

NG ("Steering Angle Sensor" side abnormality)

B

NG ("Main Body" side abnormality)

C

NG ("Steering Angle Sensor" and "Main Body" are abnormality)

D

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): PROBLEM SYMPTOMS TABLE 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): PROBLEM SYMPTOMS TABLE

B

REPLACE STEERING SENSOR 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL

D

GO TO STEP 4

C

3.

CHECK TECHSTREAM (STEERING SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

(b) Disconnect the G68 steering sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G68-7 (HEAD) - G44-16 (HEAD)

Always

Below 1 Ω

G68-7 (HEAD) or G44-16 (HEAD) - 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 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

INSPECT TURN SIGNAL SWITCH

(a) Remove the turn signal switch.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): HEADLIGHT DIMMER SWITCH: REMOVAL

(b) Inspect the turn signal switch.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): HEADLIGHT DIMMER SWITCH: INSPECTION

NG

REPLACE TURN SIGNAL SWITCH

OK

5.

INSPECT STEERING WHEEL SWITCH HOUSING

(a) Remove the steering wheel switch housing.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL

(b) Inspect the steering wheel switch housing.

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

NG

REPLACE STEERING WHEEL SWITCH HOUSING 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL

OK

6.

CHECK HARNESS AND CONNECTOR (STEERING SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

(b) Disconnect the G68 steering sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G68-7 (HEAD) or G44-16 (HEAD) - Body ground

Always

10 kΩ or higher

OK

REPLACE STEERING SENSOR 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

INSPECT TURN SIGNAL SWITCH

(a) Remove the turn signal switch.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): HEADLIGHT DIMMER SWITCH: REMOVAL

(b) Inspect the turn signal switch.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): HEADLIGHT DIMMER SWITCH: INSPECTION

NG

REPLACE TURN SIGNAL SWITCH

OK

8.

INSPECT STEERING WHEEL SWITCH HOUSING

(a) Remove the steering wheel switch housing.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL

(b) Inspect the steering wheel switch housing.

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

OK

REPLACE STEERING SENSOR 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL

NG

REPLACE STEERING WHEEL SWITCH HOUSING 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; LIGHTING (EXT): SWITCH HOUSING: REMOVAL