NIGHT VIEW SYSTEM, Diagnostic DTC:B2815

DTC Code DTC Name
B2815 Low Beam Headlights do not Illuminate

DESCRIPTION

for LED Headlight:

The main body ECU monitors the low beam illumination state. If a low beam malfunction is detected, the main body ECU sends a malfunction signal to the No. 1 night view ECU via CAN communication and a DTC is stored.

for HID Headlight:

The No. 1 night view ECU monitors the state of the low beam headlights. When a low beam headlight malfunction is detected, a DTC is stored.

Tech Tips

While DTCs are stored, the night view system does not operate and a warning message is displayed on the accessory meter assembly.

DTC Code DTC Detection Condition Trouble Area
B2815

    for LED Headlight:

  • The No. 1 night view ECU receives a low beam illumination malfunction signal via CAN communication during the low beam illumination command state.

  • Lighting system

  • CAN communication system

  • No. 1 night view ECU

    for HID Headlight:

  • With the low beam headlights commanded to turn on, the voltage at terminal LPFL of the No. 1 night view ECU is not between 3.68 and 6 V (when the battery voltage is 10,5 V) for 30 seconds or more.

  • Lighting system

  • Harness or connector

  • Headlight unit assembly

  • Light failure indicator sensor

  • No. 1 night view ECU

  • Headlight light control ECU sub-assembly

WIRING DIAGRAM

A01FR7WE03
A01FSLHE03

INSPECTION PROCEDURE

Note


  • When the No. 1 night view ECU is replaced, perform night view camera adjustment Click here.

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

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check the vehicle type.

      Result
      Result Proceed to
      for LED Headlight A
      for HID Headlight B

    B

    CHECK THAT THE HEADLIGHTS ILLUMINATE Click here

    A

  2. CHECK THAT THE HEADLIGHTS ILLUMINATE


    1. Check if the headlights illuminate normally when the headlight dimmer switch is operated.

      OK
      Headlights illuminate normally.

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  3. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG) and turn the GTS on.

    3. Enter the following menus: System Select / Health Check.

    4. Clear the DTCs.

    5. Turn the power switch off.

    6. Wait 6 seconds after turning the power switch off.

    7. Enter the following menus: System Select / Health Check.

    8. Check for DTCs.

      Result
      Result Proceed to
      DTC B2815 is output A
      Lighting system DTC is output B
      CAN communication system DTC is output (for LHD) C
      CAN communication system DTC is output (for RHD) D

    B

    GO TO LIGHTING SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    D

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

    REPLACE NO. 1 NIGHT VIEW ECU Click here

  4. CHECK THAT THE HEADLIGHTS ILLUMINATE


    1. Check if the headlights illuminate normally when the headlight dimmer switch is operated.

      OK
      Headlights illuminate normally.

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01FVY1E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Headlight Unit Assembly RH)
      *b

      Front view of wire harness connector

      (to Headlight Unit Assembly LH)

      Disconnect the headlight unit assembly connectors.

    2. Measure the voltage according to the value(s) on the table below.

      Standard Voltage
      RH Side
      Tester Connection Switch Condition Specified Condition
      B2-8 (LO) - Body ground Headlight dimmer switch off Below 1 V
      Headlight dimmer switch HEAD 11 to 14 V
      B2-4 (SOL) - Body ground Power switch on (IG) 11 to 14 V
      LH Side
      Tester Connection Switch Condition Specified Condition
      B5-8 (LO) - Body ground Headlight dimmer switch off Below 1 V
      Headlight dimmer switch HEAD 11 to 14 V
      B5-4 (SOL) - Body ground Power switch on (IG) 11 to 14 V

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

      Standard Resistance
      RH Side
      Tester Connection Condition Specified Condition
      B2-9 (E) - Body ground Always Below 1 Ω
      LH Side
      Tester Connection Condition Specified Condition
      B5-9 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY - NO. 1 NIGHT VIEW ECU)


    1. Disconnect the B2*1 and B5*2 headlight unit assembly connectors.


      • *1: RH Side

      • *2: LH Side

    2. Disconnect the T34 No. 1 night view ECU connector.

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

      Standard Resistance
      RH Side
      Tester Connection Condition Specified Condition
      B2-6 (IRR) - T34-4 (LPFL) Always Below 1 Ω
      B2-6 (IRR) - Body ground Always 10 kΩ or higher
      LH Side
      Tester Connection Condition Specified Condition
      B5-6 (IRL) - T34-4 (LPFL) Always Below 1 Ω
      B5-6 (IRL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT HEADLIGHT UNIT ASSEMBLY


    1. Remove the headlight unit assembly Click here.

      A01FVDIE02
      Text in Illustration
      *a

      Component without harness connected

      (Headlight Unit Assembly RH)

      		 *b

      Component without harness connected

      (Headlight Unit Assembly LH)

    2. Remove the headlight lens Click here.

    3. Disconnect the A light failure indicator sensor connector.

    4. Disconnect the B headlight light control ECU sub-assembly connector.

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

      Standard Resistance
      RH Side
      Tester Connection Condition Specified Condition
      4 (SLO) - A-6 Always Below 1 Ω
      6 (IRR) - A-7 Always Below 1 Ω
      8 (LO) - A-5 Always Below 1 Ω
      9 (E) - A-4 Always Below 1 Ω
      9 (E) - A-3 Always Below 1 Ω
      A-1 - B-3 Always Below 1 Ω
      A-2 - B-3 Always Below 1 Ω
      LH Side
      Tester Connection Condition Specified Condition
      4 (SLO) - A-6 Always Below 1 Ω
      6 (IRL) - A-7 Always Below 1 Ω
      8 (LO) - A-5 Always Below 1 Ω
      9 (E) - A-4 Always Below 1 Ω
      9 (E) - A-3 Always Below 1 Ω
      A-1 - B-3 Always Below 1 Ω
      A-2 - B-3 Always Below 1 Ω

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY Click here

    OK

  8. REPLACE LIGHT FAILURE INDICATOR SENSOR


    1. Temporarily replace the light failure indicator sensor with a new or normally functioning one Click here.


    NEXT

  9. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch off.

    3. Wait 6 seconds after turning the power switch off and then turn power switch on (IG).

    4. Check for DTCs Click here.

      OK
      DTC B2851 is not output.

    NG

    REPLACE NO.1 NIGHT VIEW ECU Click here

    OK

    END (LIGHT FAILURE INDICATOR SENSOR IS DEFECTIVE)

  10. REPLACE NO.1 NIGHT VIEW ECU


    1. Temporarily replace the No. 1 night view ECU with a new or normally functioning one Click here.


    NEXT

  11. ADJUST NIGHT VIEW CAMERA ASSEMBLY


    1. Perform night view camera adjustment Click here.


    NEXT

  12. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch off.

    3. Wait 6 seconds after turning the power switch off and then turn power switch on (IG).

    4. Wait 30 seconds after turning the headlight dimmer switch to the head position.

    5. Check for DTCs Click here.

      OK
      DTC B2851 is not output.

    NG

    REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY Click here

    OK

    END (NO. 1 NIGHT VIEW ECU IS DEFECTIVE)