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

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