Toyota CH-R Service Manual: Clearance Light/Daytime Running Light Circuit

Toyota CH-R Service Manual / Lighting (ext) / Lighting System / Clearance Light/Daytime Running Light Circuit

DESCRIPTION

Clearance 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 ECU sub-assembly LH and illuminates the clearance lights.
Daytime running light function:
  • When the operation conditions of the daytime running lights are met, the main body ECU (multiplex network body ECU) sends an illumination request signal to the headlight ECU sub-assembly LH and illuminates the daytime running lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

Click here

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

(d) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Clearance Light

Clearance lights

ON or OFF

-

Daytime Running Light

Daytime running lights

ON or OFF

-

Body Electrical > HL AutoLeveling > Active Test

Tester Display

Clearance Light

Body Electrical > HL AutoLeveling > Active Test

Tester Display

Daytime Running Light

OK:

Clearance lights and daytime running lights illuminate.

Result

Proceed to

OK

A

NG (for LH Side)

B

NG (for RH Side)

C

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 3

B

2.

REPLACE HEADLIGHT UNIT ASSEMBLY LH

(a) Replace the headlight unit assembly LH with a new or known good one.

  • for Halogen Headlight: Click here
  • for LED Headlight: Click here

(b) Check that the clearance light LH and daytime running light LH operate normally.

OK:

Clearance light LH and daytime running light LH operate normally.

OK

END (HEADLIGHT UNIT ASSEMBLY LH WAS DEFECTIVE)

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

3.

REPLACE HEADLIGHT UNIT ASSEMBLY RH

(a) Replace the headlight unit assembly RH with a new or known good one.

  • for Halogen Headlight: Click here
  • for LED Headlight: Click here

(b) Check that the clearance light RH and daytime running light RH operate normally.

OK:

Clearance light RH and daytime running light RH operate normally.

OK

END (HEADLIGHT UNIT ASSEMBLY RH WAS DEFECTIVE)

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

    Daytime Running Light Relay Circuit
    DESCRIPTION The main body ECU (multiplex network body ECU) controls the daytime running lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to ...

    Front Fog Light Circuit
    DESCRIPTION The main body ECU (multiplex network body ECU) controls the front fog lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses and bulbs for circuits related ...

    Other materials:

    Toyota CH-R Service Manual > Electric Parking Brake System: Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

    Toyota CH-R Service Manual > Automatic Headlight Beam Level Control System: Left Headlight ECU Variation Error (B2456)
    DESCRIPTION This DTC is stored when a headlight ECU sub-assembly LH which is not compatible with the vehicle has been installed. DTC No. Detection Item DTC Detection Condition Trouble Area Note B2456 Left Headligh ...

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2025 Copyright www.tochr.net
    0.0146