Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Even though Headlights are Turned on Head-unit does not Dim the Display

Toyota Corolla Cross (2022-2024) Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Even though Headlights are Turned on Head-unit does not Dim the Display

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

Click here

PROCEDURE

1.

CHECK IMAGE QUALITY SETTING

(a) Select settings icon from the screen.

(b) Select "Display" from the "Settings" menu screen.

(c) Select "Screen" to display the settings screen.

(d) Turn the light control switch to the tail or head position.

(e) Check that the "Automatic" setting on the display adjustment screen is set to on.

Result

Proceed to

"Automatic" setting is set to off.

A

"Automatic" setting is set to on.

B

A

CHANGE "Automatic" SCREEN SETTING TO ON

B

2.

CHECK RHEOSTAT SETTING

(a) Check the rheostat setting.

Result

Proceed to

Set to maximum brightness

A

Set to other than maximum brightness

B

A

SET RHEOSTAT SETTING OTHER THAN MAXIMUM BRIGHTNESS

B

3.

CHECK VEHICLE SIGNAL (OPERATION CHECK)

(a) Enter diagnostic mode.

Click here

(b) Select "Function Check/Setting" from the "Service Menu" screen.

(c) Select "Vehicle Signal" from the "Function Check/Setting I" screen.

(d) Operate the light control switch and check that the display changes between ON and OFF accordingly.

OK:

TAIL

Condition

Display

Light control switch OFF

OFF

Light control switch TAIL or HEAD

ON

ADIM/TCAN

Condition

Display

Ignition switch ON, Light control switch TAIL or HEAD, Automatic light control sensor is covered by hand

Dimmed

Ignition switch ON, Light control switch TAIL or HEAD, Automatic light control sensor is not covered by hand

Not dimmed

HINT:

This display is updated once per second.

Result

Proceed to

Normal

A

TAIL signal malfunction

B

ADIM/TCAN signal malfunction

C

A

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

GO TO CAN COMMUNICATION SYSTEM

for HEV Model: Click here

for Gasoline Model: Click here

B

4.

CHECK HARNESS AND CONNECTOR (ILL+ CIRCUIT)

(a) Disconnect the I55 radio and display receiver assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I55-25 (ILL+) - Body ground

Ignition switch ON, Light control switch TAIL or HEAD

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (RADIO AND RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)

(a) Disconnect the I55 radio and display receiver assembly connector.

(b) Disconnect the I4 combination meter assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I55-24 (ILL-) - I4-23 (ILL-)

Always

Below 1 Ω

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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