LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): B242E; Open in IG Circuit; 2019 - 2021 MY RAV4 RAV4 HV [11/2018

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000001G2BV
Model Year Start: 2019	Model: RAV4	Prod Date Range: [11/2018 - 12/2021]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ Headlight ECU without AFS): B242E; Open in IG Circuit; 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]

DTC

B242E

Open in IG Circuit

DESCRIPTION

The headlight ECU sub-assembly operates using the power source voltage input from the IG terminal and ECUB terminal.

The IG terminal power source voltage is supplied by turning the IG1 NO. 1 relay to ON.

The headlight ECU sub-assembly receives ignition switch ON signals from the main body ECU (multiplex network body ECU) via CAN communication, compares the ignition switch ON signal and the power source voltage supply condition of the IG terminal and monitors the result.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Note
B242E	Open in IG Circuit	Detection condition: The ignition switch is ON Malfunction status: When the IG terminal power source voltage is 0 V (ignition switch off), IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication are continuously received Malfunction duration: 10 seconds or more	Headlight ECU sub-assembly LH Harness or connector	HL AutoLeveling	-

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Note
B242E	Open in IG Circuit	Detection condition: The ignition switch is ON Malfunction status: When the IG terminal power source voltage is 0 V (ignition switch off), IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication are continuously received Malfunction duration: 10 seconds or more	Headlight ECU sub-assembly RH Harness or connector	HL AutoLeveling (Sub)	-

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

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Clear DTCs.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTC B242E is not output.

Result	Proceed to
OK	A
NG (DTC output from headlight ECU sub-assembly LH)	B
NG (DTC output from headlight ECU sub-assembly RH)	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 4

3.	CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - BATTERY AND BODY GROUND)

*a	Front view of wire harness connector (to Headlight ECU Sub-assembly LH)

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

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
A11-4 (IG) - Body ground	Ignition switch ON	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
A11-12 (GND) - Body ground	Always	Below 1 Ω

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY RH - BATTERY AND BODY GROUND)

*a	Front view of wire harness connector (to Headlight ECU Sub-assembly RH)

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