Toyota Camry (XV70): 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 .gif)
- *: w/ Smart Key System
PROCEDURE
|
1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(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 |
- |
|
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 | .gif) |
GO TO STEP 5 |
|
.gif)
|
2. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(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 |
- |
|
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 |
|---|---|---|
|
K71-7 (HEAD) - z6-4 (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 K52 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 |
|---|---|---|
|
K71-7 (HEAD) - K52-16 (HEAD) |
Always | Below 1 Ω |
|
K71-7 (HEAD) or K52-16 (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 | |
REPLACE TURN SIGNAL SWITCH |
|
|
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 |
READ NEXT:
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