Automatic High Beam System does not Operate or Operation Indicator does not Illuminate [10/2017 - 09/2018]: Procedure

CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT

Check the operation of the automatic high beam indicator light.

Turn the power switch on (IG).
Turn the light control switch to the AUTO or head position.
Turn the headlight dimmer switch to the high position.
Turn the automatic high beam main switch on.

Automatic high beam indicator light illuminate.

Result

Proceed to
OK
NG

Result:

See step 4

Result:

See step 2

READ VALUE USING TECHSTREAM

Using the Techstream, read the Data List.

Refer to DATA LIST / ACTIVE TEST [10/2017 - 09/2018]

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.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto H Beam STS0	Automatic high beam sensor state past 0	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err	Condition can be displayed	-

Body Electrical > Main Body > Data List

Tester Display
Auto H Beam STS0

The Data List value displays ""Daytime".

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	Automatic High Beam Sensor
*2	Work Light or Equivalent
*a	100 mm (3.94 in.) or less

Result

Result	Proceed to
OK	A
NG (w/ AFS [Front-lighting Adaptive System])	B
NG (w/o AFS [Front-lighting Adaptive System])	C

Result:

REPLACE OBJECT RECOGNITION CAMERA. Refer to REMOVAL [10/2017 - 09/2018]

Result:

REPLACE FORWARD RECOGNITION CAMERA. Refer to REMOVAL [10/2017 - 09/2018]

Result:

See step 3

READ VALUE USING TECHSTREAM

Using the Techstream, read the Data List.

Refer to DATA LIST / ACTIVE TEST [10/2017 - 09/2018]

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.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto H Beam STS0	Automatic high beam sensor state past 0	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err	Condition can be displayed	-

Body Electrical > Main Body > Data List

Tester Display
Auto H Beam STS0

The Data List value displays ""Speed".

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	Cardboard or Equivalent Object
*a	150 mm (5.91 in.) or higher
*b	3 mm (0.118 in.) or higher

Result

Result	Proceed to
OK	A
NG (w/ AFS [Front-lighting Adaptive System])	B
NG (w/o AFS [Front-lighting Adaptive System])	C

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 09/2018]

Result:

REPLACE OBJECT RECOGNITION CAMERA. Refer to REMOVAL [10/2017 - 09/2018]

Result:

REPLACE FORWARD RECOGNITION CAMERA. Refer to REMOVAL [10/2017 - 09/2018]

READ VALUE USING TECHSTREAM

Using the Techstream, read the Data List.

Refer to DATA LIST / ACTIVE TEST [10/2017 - 09/2018]

Chassis > Steering Angle Sensor > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto High Beam Main Switch	Automatic high beam main switch signal	OFF or ON	OFF: Automatic high beam main switch off ON: Automatic high beam main switch on	-

Chassis > Steering Angle Sensor > Data List

Tester Display
Auto High Beam Main Switch

Normal condition listed above is displayed.

Result

Proceed to
OK
NG

Result:

See step 7

Result:

See step 5

READ VALUE USING TECHSTREAM

Using the Techstream, read the Data List.

Refer to DATA LIST / ACTIVE TEST [10/2017 - 09/2018]

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto H Beam STS0	Automatic high beam sensor state past 0	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err	Condition can be displayed	-

Body Electrical > Main Body > Data List

Tester Display
Auto H Beam STS0

The Data List value displays "Daytime" or "Speed".

Result

Result	Proceed to
OK	A
NG (w/ AFS [Front-lighting Adaptive System])	B
NG (w/o AFS [Front-lighting Adaptive System])	C

Result:

REPLACE OBJECT RECOGNITION CAMERA. Refer to REMOVAL [10/2017 - 09/2018]

Result:

REPLACE FORWARD RECOGNITION CAMERA. Refer to REMOVAL [10/2017 - 09/2018]

Result:

See step 6

PERFORM ACTIVE TEST USING TECHSTREAM

Perform the Active Test according to the display on the Techstream.

Refer to DATA LIST / ACTIVE TEST [10/2017 - 09/2018]

Body Electrical > Combination Meter > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Automatic High Beam Indicator (Green)	Automatic high beam indicator light	OFF or ON	-

Body Electrical > Combination Meter > Active Test

Tester Display
Automatic High Beam Indicator (Green)

Automatic high beam indicator light illuminate.

Result

Proceed to
OK
NG

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [10/2017 - 09/2018]

Result:

REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [10/2017 - 10/2020]

INSPECT TURN SIGNAL SWITCH

Remove the turn signal switch.
Refer to REMOVAL [10/2017 - ]

Inspect the turn signal switch.

Refer to INSPECTION [10/2017 - 10/2020]

Result

Proceed to
OK
NG

Result:

REPLACE TURN SIGNAL SWITCH. Refer to REMOVAL [10/2017 - ]

Result:

See step 8

INSPECT STEERING WHEEL SWITCH HOUSING

Remove the steering wheel switch housing.
Refer to REMOVAL [10/2017 - 09/2018]

Inspect the steering wheel switch housing.

Refer to INSPECTION [10/2017 - ]

Result

Proceed to
OK
NG

Result:

REPLACE STEERING SENSOR. Refer to REMOVAL [10/2017 - 09/2018]

Result:

REPLACE STEERING WHEEL SWITCH HOUSING. Refer to REMOVAL [10/2017 - 09/2018]