| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001AYCM |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - ] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model without Cornering Light): Headlight Dimmer Switch Circuit; 2019 - 2022 MY Avalon [04/2018 - ] | ||
|
Headlight Dimmer Switch Circuit |
DESCRIPTION
The steering sensor receives the following switch information:
- Light control switch in DRL OFF*, tail, head or AUTO position
-
Dimmer switch in high, low or high flash (pass) position
- *: w/ DRL OFF Switch
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
![2019 - 2020 MY Avalon [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
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 / 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 |
|---|---|---|---|---|
|
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 position |
w/ 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 |
- |
|
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 |
- |
|
High Beam Main Switch |
Dimmer switch high position signal |
OFF or ON |
OFF: Dimmer switch not in high position ON: Dimmer switch in high position |
- |
|
Passing Light Switch |
Dimmer switch high flash position (pass) signal |
OFF or ON |
OFF: Dimmer switch not in high flash position ON: Dimmer switch in high flash position |
- |
Chassis > Steering Angle Sensor > Data List
|
Tester Display |
|---|
|
Light OFF Switch |
|
Auto Light Switch |
|
Head Light Switch (Tail) |
|
Head Light Switch (Head) |
|
High Beam Main Switch |
|
Passing Light Switch |
OK:
Normal conditions listed above are displayed.
| NG |
|
|
|
2. |
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 |
|---|---|---|---|---|
|
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 |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Head Light SW (Head) |
OK:
Normal conditions listed above are displayed.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
|
|
3. |
INSPECT STEERING SENSOR |
|
*a |
Component without harness connected (Steering Sensor) |
- |
- |
(a) Remove the steering sensor.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G48-7 (HEAD) - z4-4 (H) |
Always |
Below 1 Ω |
| NG |
|
REPLACE STEERING SENSOR
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (STEERING SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G48-7 (HEAD) - G33-16 (HEAD) |
Always |
Below 1 Ω |
|
G48-7 (HEAD) or G33-16 (HEAD) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
INSPECT TURN SIGNAL SWITCH |
(a) Remove the turn signal switch.
Click here
(b) Inspect the turn signal switch.
Click here
| NG |
|
|
|
6. |
INSPECT STEERING WHEEL SWITCH HOUSING |
(a) Remove the steering wheel switch housing.
Click here
(b) Inspect the steering wheel switch housing.
Click here
| OK |
|
REPLACE STEERING SENSOR
|
| NG |
|
REPLACE STEERING WHEEL SWITCH HOUSING
|
|
|