NIGHT VIEW SYSTEM, Diagnostic DTC:B281C

DTC Code DTC Name
B281C Near Infrared Camera Sync Signal is not received

DESCRIPTION

The No. 1 night view ECU monitors the synchronization signal of the object recognition camera (night view camera). This DTC is stored when a synchronization signal malfunction is detected.

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
B281C There is an NTSC signal synchronization problem.

  • Harness or connector

  • Object recognition camera (night view camera)

  • No. 1 night view ECU

WIRING DIAGRAM

A01H1RXE02

INSPECTION PROCEDURE

Note

When the No. 1 night view ECU and/or object recognition camera (night view camera) is replaced, perform object recognition camera (night view camera) adjustment Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (NO. 1 NIGHT VIEW ECU - OBJECT RECOGNITION CAMERA [NIGHT VIEW CAMERA])


    1. Disconnect the p2 No. 1 night view ECU connector.

    2. Disconnect the X17 object recognition camera (night view camera) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      p2-17 (CCD+) - X17-1 (CB+) Always Below 1 Ω
      p2-18 (NTSC) - X17-4 (CV+) Always Below 1 Ω
      p2-19 (CLTS) - X17-3 (CC+) Always Below 1 Ω
      p2-20 (CCD-) - X17-2 (CGND) Always Below 1 Ω
      p2-21 (SG) - X17-5 (SG2) Always Below 1 Ω
      p2-17 (CCD+) - Body ground Always 10 kΩ or higher
      p2-18 (NTSC) - Body ground Always 10 kΩ or higher
      p2-19 (CLTS) - Body ground Always 10 kΩ or higher
      p2-20 (CCD-) - Body ground Always 10 kΩ or higher
      p2-21 (SG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK NO. 1 NIGHT VIEW ECU


    1. A01GXFLE02
      Text in Illustration
      *a

      Component with harness connected

      (No. 1 Night View ECU)

      Using the GTS, follow the instructions to switch to the "Night View" screen and select "Active Test" Click here.

    2. Select "Night View System Operation" on the screen and forcibly operate the night view system.

    3. Measure the pulse from the rear of the No. 1 night view ECU.

      Measurement Condition
      Item Content
      Terminal No. (Symbol) p2-18 (NTSC) - p2-20 (CCD-)
      Tool Setting 200 mV/DIV., 10 μs./DIV.
      Condition Night view system operating (forcibly operated using Active Test) and image output to accessory meter assembly
      OK
      The pulse changes according to the image from No. 1 night view ECU.

    NG

    REPLACE OBJECT RECOGNITION CAMERA (NIGHT VIEW CAMERA) Click here

    OK

    REPLACE NO. 1 NIGHT VIEW ECU Click here