Headlight Dimmer Switch Circuit [10/2020 - 10/2023]: Procedure
- READ VALUE USING TECHSTREAM
- Using the Techstream, read the Data List.
Refer to DATA LIST / ACTIVE TEST [10/2020 - 10/2023]
Chassis > Steering Angle Sensor > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Light OFF Switch Light control switch DRL-off position signal OFF or ON OFF: Light control switch not in DRL-off position
ON: Light control switch in DRL-off positionw/ DRL OFF Switch Auto Light Switch Light control switch Auto position signal OFF or ON OFF: Light control switch not in Auto position
ON: Light control switch in Auto position- Head Light Switch (Tail) Light control switch Tail position signal OFF or ON OFF: Light control switch in neither Tail nor Head position
ON: Light control switch in Tail or Head position- High Beam Main Switch Headlight dimmer switch High position signal OFF or ON OFF: Headlight dimmer switch not in High position
ON: Headlight dimmer switch in High position- Passing Light Switch Headlight dimmer switch Flash position signal OFF or ON OFF: Headlight dimmer switch not in Flash position
ON: Headlight dimmer switch in Flash position- Chassis > Steering Angle Sensor > Data List
Tester Display Light OFF Switch Auto Light Switch Head Light Switch (Tail) High Beam Main Switch Passing Light Switch OK
Normal conditions listed above are displayed.
Result
Proceed to OK NG
Result:
NG
See step 7
Result:
OK
See step 2
- Using the Techstream, read the Data List.
- READ VALUE USING TECHSTREAM
- Using the Techstream, read the Data List.
Refer to DATA LIST / ACTIVE TEST [10/2020 - 10/2023]
Chassis > Steering Angle Sensor > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Head Light Switch (Head) Light control switch Head position signal OFF or ON OFF: Light control switch not in Head position
ON: Light control switch in Head position- Body Electrical > Main Body > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Head Light SW (Head) Light control switch Head position signal OFF or ON OFF: Light control switch not in Head position
ON: Light control switch in Head position- Chassis > Steering Angle Sensor > Data List
Tester Display Head Light Switch (Head) Body Electrical > Main Body > Data List
Tester Display Head Light SW (Head) OK
Normal conditions listed above are displayed.
Result
Result Proceed to OK A NG ("Steering Angle Sensor" side abnormality) B NG ("Main Body" side abnormality) C NG ("Steering Angle Sensor" and "Main Body" are abnormality) D
Result:
A
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [10/2020 - 10/2023]
Result:
B
REPLACE STEERING SENSOR. Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
Result:
D
See step 4
Result:
C
See step 3
- Using the Techstream, read the Data List.
- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - STEERING SENSOR)
- Disconnect the G12 main body ECU (multiplex network body ECU) connector.
- Disconnect the G29*1 or G30*2 steering sensor connector.
- *1: w/ VGRS
- *2: w/o VGRS
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
W/ VGRSTester Connection Condition Specified Condition G12-16 (HEAD) - G29-7 (HEAD) Always Below 1 Ω W/O VGRSTester Connection Condition Specified Condition G12-16 (HEAD) - G30-7 (HEAD) Always Below 1 Ω Result
Proceed to OK NG
Result:
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- INSPECT TURN SIGNAL SWITCH
- Remove the turn signal switch.
Refer to REMOVAL [12/2017 - ]
- Inspect the turn signal switch.
Refer to INSPECTION [10/2020 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE TURN SIGNAL SWITCH. Refer to REMOVAL [12/2017 - ]
Result:
OK
See step 5
- Remove the turn signal switch.
- INSPECT STEERING WHEEL SWITCH HOUSING
- Remove the steering wheel switch housing.
Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
- Inspect the steering wheel switch housing.
Refer to INSPECTION [12/2017 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE STEERING WHEEL SWITCH HOUSING. Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
Result:
OK
See step 6
- Remove the steering wheel switch housing.
- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - STEERING SENSOR)
- Disconnect the G12 main body ECU (multiplex network body ECU) connector.
- Disconnect the G29*1 or G30*2 steering sensor connector.
- *1: w/ VGRS
- *2: w/o VGRS
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
W/ VGRSTester Connection Condition Specified Condition G12-16 (HEAD) or G29-7 (HEAD) - Body ground Always 10 kΩ or higher W/O VGRSTester Connection Condition Specified Condition G12-16 (HEAD) or G30-7 (HEAD) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE STEERING SENSOR. Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- INSPECT TURN SIGNAL SWITCH
- Remove the turn signal switch.
Refer to REMOVAL [12/2017 - ]
- Inspect the turn signal switch.
Refer to INSPECTION [10/2020 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE TURN SIGNAL SWITCH. Refer to REMOVAL [12/2017 - ]
Result:
OK
See step 8
- Remove the turn signal switch.
- INSPECT STEERING WHEEL SWITCH HOUSING
- Remove the steering wheel switch housing.
Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
- Inspect the steering wheel switch housing.
Refer to INSPECTION [12/2017 - ]
Result
Proceed to OK NG
Result:
OK
REPLACE STEERING SENSOR. Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
Result:
NG
REPLACE STEERING WHEEL SWITCH HOUSING. Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]
- Remove the steering wheel switch housing.