Automatic High Beam System does not Operate or Operation Indicator does not Illuminate [12/2019 - 09/2020]: Procedure

1. Using the GTS, check for Vehicle Control History (RoB).

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

   Tester Display
   Vehicle Control History (RoB)

   Result

   Result	Proceed to
   Vehicle Control History X204E is not output	A
   Vehicle Control History X204E is output	B

Result: 

B 

GO TO VEHICLE CONTROL HISTORY. Refer to  VEHICLE CONTROL HISTORY [12/2019 - 09/2020] 

Result: 

A 

See step  2

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

   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 GTS.

   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.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

END (TEMPORARY SUSPENSION OF AUTOMATIC HIGH BEAM SYSTEM DUE TO HIGH FORWARD RECOGNITION CAMERA TEMPERATURE) 

Result: 

OK 

See step  3

1. Check the operation of the automatic high beam indicator light.
   1. Turn the ignition switch to ON.
   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

   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

Result: 

B 

See step  6

Result: 

C 

GO TO OTHER PROBLEM (Proceed to Automatic High Beam Switch Indicator does not Come ON). Refer to  Automatic High Beam Switch Indicator does not Come ON [12/2019 - 11/2023]  

Result: 

D 

See step  7

Result: 

A 

See step  4

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.

   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

   "Daytime" is displayed on the GTS.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [12/2019 - 09/2020] 

Result: 

OK 

See step  5

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
   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 GTS.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

NG 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [12/2019 - 09/2020] 

1. Perform the Active Test according to the display on the GTS.

   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	-

   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.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

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
   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.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  9

Result: 

OK 

See step  8

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
   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 GTS.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

NG 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [12/2019 - 09/2020] 

1. Remove the auto high beam switch.

   Refer to REMOVAL [12/2019 - ]

2. Inspect the auto high beam switch.

   Refer to INSPECTION [12/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE AUTO HIGH BEAM SWITCH. Refer to  REMOVAL [12/2019 - ] 

Result: 

OK 

See step  10

1. Disconnect the H43 main body ECU (multiplex network body ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H41-5 (+B) - H43-26 (AHBI)	Always	Below 1 Ω
   H41-5 (+B) or H43-26 (AHBI) - Body ground	Always	10 kΩ or higher
   H41-2 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR