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.

Click here

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > HL AutoLeveling > Clear DTCs
NEXT

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
A

USE SIMULATION METHOD TO CHECK

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

C

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. ...

    Other materials:

    Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Noise Occurs
    PROCEDURE 1. CHECK NOISE CONDITION (a) Check from which direction the noise comes (front left or right, or rear left or right). OK: The location of the noise source can be determined. NG GO TO STEP 3 OK ...

    Toyota CH-R Service Manual > Front Evaporator Temperature Sensor(for Denso Made): Inspection
    INSPECTION PROCEDURE 1. INSPECT NO. 1 COOLER THERMISTOR (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below. *a Component without harness connected (No. 1 Cooler Thermistor) *b Sensing Portion ...

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2025 Copyright www.tochr.net
    0.0135