| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H5VZ |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM (for HV Model): Automatic High Beam System does not Operate or Operation Indicator does not Illuminate; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
Automatic High Beam System does not Operate or Operation Indicator does not Illuminate |
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the automatic high beam system based on signals received from the forward recognition camera.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
![2020 MY Corolla Corolla HV [01/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.
One Time Recognition: Click here
Sequential Recognition: Click here
- Before performing troubleshooting, check that the low beam headlights and high beam headlights illuminate correctly.
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly 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.
- If the forward recognition camera cannot operate due to high vehicle interior temperatures, bad weather (rain, fog, etc.) or fogged up or dirty glass, the automatic high beam system will not operate and the automatic high beam indicator will not illuminate.
-
Before performing troubleshooting, check that the front radar sensor system operates correctly.
Click here
PROCEDURE
|
1. |
CHECK VEHICLE CONTROL HISTORY* |
(a) Using the Techstream, check for Vehicle Control History (RoB).
Body Electrical > Front Recognition Camera (Front Lighting Control) > Utility
|
Tester Display |
|---|
|
Vehicle Control History (RoB) |
|
Result |
Proceed to |
|---|---|
|
Vehicle Control History X204E is not output |
A |
|
Vehicle Control History X204E is output |
B |
| B |
|
|
|
2. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / Front Recognition Camera / Data List.
(e) Read the Data List according to the display on the Techstream.
Chassis > Front Recognition Camera > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Front Recognition Camera High Temperature 2 |
Forward recognition camera condition |
Not High Temperature or High Temperature |
Not High Temperature: 65°C (149°F) or lower High Temperature: 65°C (149°F) or higher |
When "High Temperature" is displayed, the automatic high beam system is temporarily suspended. |
Chassis > Front Recognition Camera > Data List
|
Tester Display |
|---|
|
Front Recognition Camera High Temperature 2 |
OK:
"Not High Temperature" is displayed on the Techstream.
HINT:
If "High Temperature" is displayed, move the vehicle to a cool place and allow the temperature of the forward recognition camera to decrease before continuing with troubleshooting.
| NG |
|
END (TEMPORARY SUSPENSION OF AUTOMATIC HIGH BEAM SYSTEM DUE TO HIGH FORWARD RECOGNITION CAMERA TEMPERATURE) |
|
|
3. |
CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT |
(a) Check the operation of the automatic high beam indicator light.
(1) Turn the power switch on (IG).
(2) Turn the light control switch to the AUTO or head position.
(3) Cover the automatic light control sensor to turn the low beam headlights on.
(4) Move the dimmer switch to the high position.
(5) Press the auto high beam switch.
|
Result |
Proceed to |
|---|---|
|
OK (The automatic high beam indicator light and the auto high beam switch indicator illuminate) |
A |
|
NG (Automatic high beam indicator light does not illuminate) |
B |
|
NG (Auto high beam switch indicator does not illuminate) |
C |
|
NG (Automatic high beam indicator light and auto high beam switch indicator do not operate) |
D |
| B |
|
| C |
|
GO TO OTHER PROBLEM (Proceed to Automatic High Beam Switch Indicator does not Come ON) |
| D |
|
|
|
4. |
READ VALUE USING TECHSTREAM |
|
*1 |
Forward Recognition Camera (Automatic High Beam Sensor) |
|
*2 |
Work Light or Equivalent |
|
*a |
100 mm or less |
(a) Shine a light on the automatic high beam sensor.
HINT:
If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Main Body / Data List.
(f) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Auto H Beam STS0 |
Automatic high beam sensor current state |
Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err |
Condition can be displayed |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Auto H Beam STS0 |
OK:
"Daytime" is displayed on the Techstream.
| NG |
|
|
|
5. |
READ VALUE USING TECHSTREAM |
|
*1 |
Cardboard or Equivalent Object |
|
*a |
150 mm or more |
|
*b |
3 mm or more |
(a) Cover the automatic high beam sensor with an opaque object, such as cardboard.
NOTICE:
- Make sure that there is no clearance between the cardboard or equivalent object and the area of the windshield glass in front of the automatic high beam sensor.
- If there is any clearance, light may shine on the automatic high beam sensor and the value of the Data List will not change.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Main Body / Data List.
(f) Read the Data List according to the display on the Techstream.
HINT:
As it may take time for the values in the Data List to change, wait at least 10 seconds before reading the Data List.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Auto H Beam STS0 |
Automatic high beam sensor current state |
Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err |
Condition can be displayed |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Auto H Beam STS0 |
OK:
"Speed" is displayed on the Techstream.
| OK |
|
| NG |
|
|
6. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Combination Meter > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Multi Display All (White) |
Multi-information display (White display) |
ON |
- |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Multi Display All (White) |
OK:
The multi-information display in the combination meter assembly turns on according to the operation of the Active Test.
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPLACE COMBINATION METER ASSEMBLY
|
|
7. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Auto High Beam Main Switch |
Auto high beam switch signal |
OFF or ON |
OFF: Auto high beam switch not pressed ON: Auto high beam switch pressed |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Auto High Beam Main Switch |
OK:
Normal conditions listed above are displayed.
| NG |
|
|
|
8. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Auto H Beam STS0 |
Automatic high beam sensor current state |
Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err |
Condition can be displayed |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Auto H Beam STS0 |
OK:
"Daytime" or "Speed" is displayed on the Techstream.
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
|
9. |
INSPECT AUTO HIGH BEAM SWITCH |
(a) Remove the auto high beam switch.
Click here
(b) Inspect the auto high beam switch.
Click here
| NG |
|
|
|
10. |
CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) |
(a) Disconnect the I85 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I52-5 (+B) - I85-26 (AHBI) |
Always |
Below 1 Ω |
|
I52-5 (+B) or I85-26 (AHBI) - Body ground |
Always |
10 kΩ or higher |
|
I52-2 (E) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|