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.

(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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

GO TO STEP 3

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.

END (HEADLIGHT UNIT ASSEMBLY LH WAS DEFECTIVE)

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.

END (HEADLIGHT UNIT ASSEMBLY RH WAS DEFECTIVE)

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

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

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