Toyota CH-R Service Manual: Open in IG Circuit (B242E)

Toyota CH-R Service Manual / Lighting (ext) / Lighting System / 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.

Detection Item

DTC Detection Condition

Trouble Area

Note

B242E

Open in IG Circuit

Open in the headlight ECU sub-assembly LH IG power source circuit
  • Headlight ECU sub-assembly LH
  • Harness or connector

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • 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.

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 B242E is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - POWER SOURCE AND BODY GROUND)

(a) Disconnect the A16 headlight ECU sub-assembly LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A16-4 (IG) - Body ground

Ignition switch off

Below 1 V

A16-4 (IG) - Body ground

Ignition switch ON

11 to 14 V

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A16-12 (GND) - Body ground

Always

Below 1 Ω
OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    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. ...

    Vehicle Specifications have not been Stored (B2451)
    DESCRIPTION This DTC is output if the vehicle variation information is not written to the headlight ECU sub-assembly LH. The headlight ECU sub-assembly LH outputs DTC B2451. DTC No. ...

    Other materials:

    Toyota CH-R Service Manual > Audio And Visual System(for Radio Receiver Type): Noise Occurs
    PROCEDURE 1. NOISE CONDITION (a) Check from which direction the noise comes (front left or right, 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 > Immobiliser System(w/ Smart Key System): Engine Starter Communication Malfunction (B2779)
    DESCRIPTION If the remote engine start ECU does not respond to the certification ECU (smart key ECU assembly) or the remote engine start ID is not registered, this DTC is stored. HINT: Registration status of the remote engine start ECU ID can be checked using the "Wireless C Code" i ...

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2025 Copyright www.tochr.net
    0.0123