Toyota CH-R Service Manual: Right Headlight ECU Malfunction (B242C,B242D)

Toyota CH-R Service Manual / Lighting (ext) / Lighting System / Right Headlight ECU Malfunction (B242C,B242D)

DESCRIPTION

These DTCs are stored if the headlight ECU sub-assembly LH or RH detects an internal malfunction. The headlight ECU sub-assembly LH stores DTC B242C or B242D.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B242C	Right Headlight ECU Malfunction	An internal malfunction occurs in the headlight ECU sub-assembly RH	Headlight ECU sub-assembly RH	-
B242D	Left Headlight ECU Malfunction	An internal malfunction occurs in the headlight ECU sub-assembly LH	Headlight ECU sub-assembly LH	-

CAUTION / NOTICE / HINT

NOTICE:

After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.

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PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Check for DTCs.

Click here

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B242C and B242D are not output.

Result	Proceed to
OK	A
NG (DTC B242C is output)	B
NG (DTC B242D is output)	C

USE SIMULATION METHOD TO CHECK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

Headlamp LH Circuit (B2439,B243A)

DESCRIPTION A DTC is stored when the headlight ECU sub-assembly receives a light source malfunction signal from its respective headlight unit. The headlight ECU sub-assembly LH stores DTC B2439 o ...

Open in IG Circuit (B242E)

DESCRIPTION This DTC is stored when a malfunction occurs in the headlight ECU sub-assembly LH IG power source circuit. The headlight ECU sub-assembly LH stores DTC B242E. DTC No. ...

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