Automatic High Beam System does not Operate or Operation Indicator does not Illuminate [10/2023 - ]: Procedure

1. Check for vehicle control history.

   Body Electrical > Front Recognition Camera (Front Lighting Control) > Utility 

   Tester Display
   Vehicle Control History (RoB)

   Result

   Result	Proceed to
   X204E is not output	A
   X204E is output	B

Result: 

B 

GO TO VEHICLE CONTROL HISTORY. Refer to  VEHICLE CONTROL HISTORY (RoB) [10/2023 - ] 

Result: 

A 

See step  2

1. Check the operation of the automatic high beam indicator.
   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 low position.
   5. Press the auto high beam switch.

   Result

   Result	Proceed to
   OK (The automatic high beam indicator and the auto high beam switch indicator illuminate)	A
   NG (Automatic high beam indicator does not illuminate)	B
   NG (Automatic high beam indicator and auto high beam switch indicator do not operate)	C

Result: 

B 

See step  5

Result: 

C 

See step  6

Result: 

A 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. 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.

2. Read the Data List according to the display on the GTS.

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Automatic High Beam Headlights Sensor Detection Status	Automatic high beam sensor current state	Undetected, N/A, No sens, Headlight, Taillight, Speed, Daytime, Village, Other sens, Change, Out of aim, SAE Mod, Aim adjust or LIN Err	Condition can be displayed	-

   Body Electrical > Main Body > Data List 

   Tester Display
   Automatic High Beam Headlights Sensor Detection Status

   OK

   "Daytime" is displayed on the GTS.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [10/2023 - ] 

Result: 

OK 

See step  4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Cover the automatic high beam sensor with an opaque object, such as cardboard.
   NOTE:

   • 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.
2. Read the Data List according to the display on the GTS.

   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
   Automatic High Beam Headlights Sensor Detection Status	Automatic high beam sensor current state	Undetected, N/A, No sens, Headlight, Taillight, Speed, Daytime, Village, Other sens, Change, Out of aim, SAE Mod, Aim adjust or LIN Err	Condition can be displayed	-

   Body Electrical > Main Body > Data List 

   Tester Display
   Automatic High Beam Headlights Sensor Detection Status

   OK

   "Speed" is displayed on the GTS.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

Result: 

NG 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [10/2023 - ] 

1. Using the GTS, read the Data List.

   Chassis > Front Recognition Camera > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Camera High Temperature 1 Flag	Excessive high temperature status of forward recognition camera	OFF or ON	OFF: Excessive high temperature not detected (approximately 80 °C (176 °F) or less) ON: Excessive high temperature detected (approximately 80 °C (176 °F) or more)	If this item indicates "ON", the camera might be temporarily unavailable. If this item indicates "ON", vehicle control history (RoB) X2016 is stored. HINT:  The temperature of the windshield glass may reach 100 °C (212 °F) or more in summer. If this item indicates "ON", the camera will be temporarily unavailable. If the situation does not improve even after the vehicle is cooled and left as is for 10 minutes or more, it is possible that the forward recognition camera is malfunctioning.

   Chassis > Front Recognition Camera > Data List 

   Tester Display
   Camera High Temperature 1 Flag

   OK

   The Data List value displays "OFF".

   HINT: 

   When "ON" is displayed, move the vehicle to a cool area and turn the ignition switch off to allow the temperature of the front recognition camera to decrease.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

END (THE SYSTEM STOPPED OPERATING DUE TO HIGH TEMPERATURES) 

1. Read the Data List according to the display on the GTS.

   Chassis > Steering Angle Sensor > 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 off ON: Auto high beam switch on	-

   Chassis > Steering Angle Sensor > Data List 

   Tester Display
   Auto High Beam Main Switch

   OK

   Normal conditions listed above are displayed.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  8

Result: 

OK 

See step  7

1. Read the Data List according to the display on the GTS.

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Automatic High Beam Headlights Sensor Detection Status	Automatic high beam sensor current state	Undetected, N/A, No sens, Headlight, Taillight, Speed, Daytime, Village, Other sens, Change, Out of aim, SAE Mod, Aim adjust or LIN Err	Condition can be displayed	-

   Body Electrical > Main Body > Data List 

   Tester Display
   Automatic High Beam Headlights Sensor Detection Status

   OK

   "Daytime" or "Speed" is displayed on the GTS.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [10/2023 - ] 

Refer to INSPECTION [10/2020 - ]

Result

Result: 

NG 

REPLACE TURN SIGNAL SWITCH. Refer to  REMOVAL [12/2017 - ] 

Result: 

OK 

See step  9

Refer to INSPECTION [12/2017 - ]

Result

Result: 

OK 

REPLACE STEERING SENSOR. Refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

REPLACE STEERING WHEEL SWITCH HOUSING. Refer to  REMOVAL [10/2023 - ]