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:
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PROCEDURE
1. | READ VALUE 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: 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. |
Tester Display |
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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) |
|
2. | CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT |
(a) Check the operation of the automatic high beam indicator light.
(1) Turn the engine 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 automatic high beam switch.
Result | Proceed to |
---|---|
OK (The automatic high beam indicator light and the automatic high beam switch indicator illuminate) | A |
NG (Automatic high beam indicator light does not illuminate) | B |
NG (Automatic high beam switch indicator does not illuminate) | C |
NG (Automatic high beam indicator light and automatic high beam switch indicator do not operate) | D |
B | GO TO STEP 5 |
C | GO TO OTHER PROBLEM (Proceed to Automatic High Beam Switch Indicator does not Come ON) |
D | GO TO STEP 6 |
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3. | 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 engine 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 | - |
Tester Display |
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Auto H Beam STS0 |
OK:
"Daytime" is displayed on the Techstream.
NG | REPLACE FORWARD RECOGNITION CAMERA |
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4. | 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:
(b) Connect the Techstream to the DLC3.
(c) Turn the engine 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 | - |
Tester Display |
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Auto H Beam STS0 |
OK:
"Speed" is displayed on the Techstream.
OK | USE SIMULATION METHOD TO CHECK |
NG | REPLACE FORWARD RECOGNITION CAMERA |
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 / 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) | OFF or ON | - |
Tester Display |
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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 |
6. | READ VALUE 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: 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 |
---|---|---|---|---|
Auto High Beam Main Switch | Automatic high beam switch signal | OFF or ON | OFF: Automatic high beam switch off ON: Automatic high beam switch on | - |
Tester Display |
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Auto High Beam Main Switch |
OK:
Normal conditions listed above are displayed.
NG | GO TO STEP 8 |
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7. | READ VALUE 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 / 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 | - |
Tester Display |
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Auto H Beam STS0 |
OK:
"Daytime" or "Speed" is displayed on the Techstream.
OK | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | REPLACE FORWARD RECOGNITION CAMERA |
8. | INSPECT TURN SIGNAL SWITCH |
(a) Remove the turn signal switch.
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(b) Inspect the turn signal switch.
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NG | REPLACE TURN SIGNAL SWITCH |
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9. | INSPECT STEERING WHEEL SWITCH HOUSING |
(a) Remove the steering wheel switch housing.
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(b) Inspect the steering wheel switch housing.
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OK | REPLACE STEERING SENSOR |
NG | REPLACE STEERING WHEEL SWITCH HOUSING |