Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001KY85
Model Year Start: 2020 Model: Camry HV Prod Date Range: [09/2019 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): B242E; Open in IG Circuit; 2020 - 2024 MY Camry HV [09/2019 -        ]

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 power switch on (IG) signals from the main body ECU (multiplex network body ECU) via CAN communication, compares the power switch on (IG) signal and the power source voltage supply condition of the IG terminal and monitors the result.

AFS

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242E

Open in IG Circuit

Detection condition:

  • The power switch is on (IG).

Malfunction status:

  • When the IG terminal power source voltage is 0 V (power 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

AFS

AFS (Sub)

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242E

Open in IG Circuit

Detection condition:

  • The power switch is on (IG).

Malfunction status:

  • When the IG terminal power source voltage is 0 V (power 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

AFS (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 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): INITIALIZATION 2021 - 2024 MY Camry HV [10/2020 -        ]; LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): INITIALIZATION

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs

Body Electrical > AFS (Sub) > Clear DTCs

NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Wait 10 seconds or more.

(d) Turn the Techstream on.

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

(f) Check for DTCs.

Body Electrical > AFS > Trouble Codes

Body Electrical > AFS (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
A

USE SIMULATION METHOD TO CHECK 2020 MY Camry HV [09/2019 - 10/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2021 MY Camry HV [10/2020 - 08/2021]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2022 - 2024 MY Camry HV [08/2021 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

C

GO TO STEP 5

B

3.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH (IG TERMINAL VOLTAGE)

*a

Front view of wire harness connector

(to Headlight ECU Sub-assembly LH)

(a) Disconnect the A79 headlight ECU sub-assembly LH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A79-4 (IG) - Body ground

Power switch on (IG)

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A79-12 (GND) - Body ground

Always

Below 1 Ω
OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH (IG TERMINAL VOLTAGE)

*a

Front view of wire harness connector

(to Headlight ECU Sub-assembly RH)

(a) Disconnect the A80 headlight ECU sub-assembly RH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A80-4 (IG) - Body ground

Power switch on (IG)

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A80-12 (GND) - Body ground

Always

Below 1 Ω
OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR