Toyota Corolla Cross: Headlight Dimmer Switch Circuit
DESCRIPTION
The steering sensor receives the following switch information:
- Light control switch in DRL OFF*1, TAIL, HEAD, AUTO position
- Dimmer switch in high, low or high flash (pass) position
- Fog light switch in front*2 or off position
- *1: w/ DRL OFF Switch
- *2: w/ Fog Light
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
PROCEDURE
| 1. |
READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Chassis > Steering Angle Sensor > Data List|
Tester Display | Measurement Item |
Normal Condition | Reference Value |
Diagnostic Note |
|---|---|---|---|---|
|
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 not in tail position ON: Light control switch in tail 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 |
- |
| Front Fog Light Switch |
Front fog light switch signal |
OFF or ON | OFF: Front fog light switch off ON: Front fog light switch on |
- |
|
Tester Display |
|---|
| Auto Light Switch |
|
Head Light Switch (Tail) |
|
Head Light Switch (Head) |
|
High Beam Main Switch |
|
Passing Light Switch |
|
Front Fog Light Switch |
OK:
Normal conditions listed above are displayed.
| NG | .gif) | GO TO STEP 5 |
|
.gif)
| 2. |
READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Main Body > Data List|
Tester Display | Measurement Item |
Normal Condition | Reference Value |
Diagnostic Note |
|---|---|---|---|---|
|
Light Control 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 |
- |
|
Tester Display |
|---|
| Light Control Switch (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 .gif)
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
I229-7 (HEAD) - z15-4 (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 I85 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 |
|---|---|---|
|
I229-7 (HEAD) - I85-26 (HEAD) |
Always | Below 1 Ω |
|
I229-7 (HEAD) - Body ground |
Always | 10 kΩ or higher |
|
I85-26 (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 |
HINT:
Click here
| NG | | REPLACE TURN SIGNAL SWITCH |
|
| 6. |
INSPECT STEERING WHEEL SWITCH HOUSING |
HINT:
Click here
| OK | | REPLACE STEERING SENSOR
|
| NG | | REPLACE STEERING WHEEL SWITCH HOUSING
|
READ NEXT:
Parking Light/Daytime Running Light Circuit
DESCRIPTION Parking light function:
When the main body ECU (multiplex network body ECU) receives the light control switch position signal, it sends an illumination request signal to the headlight E
Front Fog Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the front fog lights. WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body
Hazard Warning Switch Circuit
DESCRIPTION The combination meter assembly receives the hazard warning signal switch assembly on signal and controls the operation of the hazard warning lights. WIRING DIAGRAM
CAUTION / NOTICE / HIN
SEE MORE:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
HINT: Using the GTS to read the Data List allows the values or states of swit
Terminals Of Ecu
TERMINALS OF ECU CHECK VEHICLE APPROACHING SPEAKER CONTROLLER
(a) Disconnect the I256 vehicle approaching speaker controller connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Terminal Description
Condition Specified
