High Beam Headlight Circuit [02/2019 - 12/2021]: Procedure

WARNING: This page is about a different car, the 2021 Toyota RAV4, 2020 Toyota RAV4, and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Body Electrical / Main Body / Active Test.

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
Head Light Hi	High beam headlights	OFF or ON	-

Body Electrical > Main Body > Active Test

Tester Display
Head Light Hi

High beam headlights illuminate.

Result

Proceed to
OK
NG

Result:

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [02/2019 - 08/2020] , or refer to PROBLEM SYMPTOMS TABLE [08/2020 - 12/2021]

Result:

See step 2

CHECK HARNESS AND CONNECTOR (DIM RELAY - HEADLIGHT UNIT ASSEMBLY LH)

Remove the DIM relay.
Disconnect the A62 headlight unit assembly LH connector.
Disconnect the A61 headlight unit assembly RH connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
3 (DIM relay) - A62-4 (HI)	Always	Below 1 Ω
3 (DIM relay) or A62-4 (HI) - Body ground	Always	10 kΩ or higher
3 (DIM relay) or A61-4 (HI) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 3

INSPECT DIM RELAY

Remove the DIM relay.

Inspect the DIM relay.

Refer to ON-VEHICLE INSPECTION [02/2019 - ]

Result

Proceed to
OK
NG

Result:

REPLACE DIM RELAY

Result:

See step 4

CHECK HARNESS AND CONNECTOR (POWER SOURCE - DIM RELAY)

Remove the DIM relay.

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
2 (DIM relay) - Body ground	Ignition switch off	11 to 14 V
5 (DIM relay) - Body ground	Ignition switch off	11 to 14 V

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 5

CHECK HARNESS AND CONNECTOR (DIM RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Remove the DIM relay.
Disconnect the G44 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
1 (DIM relay) - G44-13 (DIM)	Always	Below 1 Ω
1 (DIM relay) or G44-13 (DIM) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR