Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001AULU
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 09/2022]
Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): High Beam Headlight Circuit; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

High Beam Headlight Circuit

DESCRIPTION

The headlight ECU sub-assembly controls the high beam headlights.

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 Corolla Corolla Hatchback GR Corolla [06/2018 - 06/2021]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): INITIALIZATION 2022 MY Corolla Corolla Hatchback GR Corolla [06/2021 - 09/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): INITIALIZATION

  • When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.

CHECK LIGHTS

(a) Check the illumination of each high beam lights.

Result

Proceed to

LH side high beam light does not illuminate

A

RH side high beam light does not illuminate

B

B

GO TO STEP 5

A

2.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Active Test.

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

Body Electrical > AFS > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Headlight High Beam

High beam headlights

OFF or ON

-

Body Electrical > AFS > Active Test

Tester Display

Headlight High Beam

OK:

High beam headlight turn on.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE 2021 - 2022 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 09/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE

NG

3.

CHECK HEADLIGHT UNIT ASSEMBLY LH

(a) Interchange the headlight unit assembly LH with RH and connect the connectors.

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

NEXT

4.

CHECK OPERATION (HIGH BEAM HEADLIGHT)

(a) Check that the high beam headlight operates normally.

OK:

High beam headlight operates normally.

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

NG

REPLACE HEADLIGHT UNIT ASSEMBLY LH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

5.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS (Sub) / Active Test.

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

Body Electrical > AFS (Sub) > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Headlight High Beam

High beam headlights

OFF or ON

-

Body Electrical > AFS (Sub) > Active Test

Tester Display

Headlight High Beam

OK:

High beam headlight turn on.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE 2021 - 2022 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 09/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE

NG

6.

CHECK HEADLIGHT UNIT ASSEMBLY RH

(a) Interchange the headlight unit assembly RH with LH and connect the connectors.

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

NEXT

7.

CHECK OPERATION (HIGH BEAM HEADLIGHT)

(a) Check that the high beam headlight operates normally.

OK:

High beam headlight operates normally.

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

NG

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY