Toyota Corolla Cross Owners & Service Manuals

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.*1

for HEV Model: Click here

for Gasoline Model: Click here

  • *1: w/ Smart Key System

PROCEDURE

1.

READ VALUE USING GTS

(a) Enter the following menus: Chassis / Steering Angle Sensor / Data List.

(b) Read the Data List according to the display on the GTS.

Chassis > Steering Angle Sensor > Data List

Tester Display

Measurement Item

Range

Normal Condition

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 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

-

Front Fog Light Switch

Front fog light switch signal

OFF or ON

OFF: Front fog light switch off

ON: Front fog light switch on

w/ Front Fog Light

Chassis > Steering Angle Sensor > Data List

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

GO TO STEP 5

OK

2.

READ VALUE USING GTS

(a) Enter the following menus: Body Electrical / Main Body / Data List.

(b) Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Diagnostic Note

Light Control Switch (HEAD)

Light control switch head position signal

OFF: Light control switch not in head position

ON: Light control switch in head position

-

Body Electrical > Main Body > Data List

Tester Display

Light Control Switch (HEAD)

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

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

I229-7 (HEAD) - z15-4 (H)

Always

Below 1 Ω

NG

REPLACE STEERING SENSOR

OK

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

Click here

NG

REPLACE TURN SIGNAL SWITCH

OK

6.

INSPECT STEERING WHEEL SWITCH HOUSING

Click here

OK

REPLACE STEERING SENSOR

NG

REPLACE STEERING WHEEL SWITCH HOUSING

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