| Last Modified: 07-31-2024 | 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](/t3Portal/stylegraphics/info.gif)
- 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 |
|
|
|
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
|
|
|
3. |
CHECK HEADLIGHT UNIT ASSEMBLY LH |
(a) Interchange the headlight unit assembly LH with RH and connect the connectors.
Click here
|
|
4. |
CHECK OPERATION (HIGH BEAM HEADLIGHT) |
(a) Check that the high beam headlight operates normally.
OK:
High beam headlight operates normally.
| OK |
|
| NG |
|
REPLACE HEADLIGHT UNIT ASSEMBLY LH
|
|
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
|
|
|
6. |
CHECK HEADLIGHT UNIT ASSEMBLY RH |
(a) Interchange the headlight unit assembly RH with LH and connect the connectors.
Click here
|
|
7. |
CHECK OPERATION (HIGH BEAM HEADLIGHT) |
(a) Check that the high beam headlight operates normally.
OK:
High beam headlight operates normally.
| OK |
|
| NG |
|
REPLACE HEADLIGHT UNIT ASSEMBLY RH
|
|
|