PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A26

DTC Code DTC Name
C1A26 Lost Communication with Gigabit Video Interface

DESCRIPTION

The driving support ECU uses the front millimeter wave radar sensor, rear millimeter wave radar sensor, driver monitor camera and object recognition camera to detect obstacles in front of and behind the vehicle, and detect the direction that the driver's head is facing. Based on this information, the driving support ECU sends pre-crash control operation signals.

When a video signal format malfunction or communication stop is detected between the object recognition ECU and object recognition camera, this DTC is output.

This DTC is also output from the dynamic radar cruise control system and lane-keeping assist system.

DTC Code DTC Detection Condition Trouble Area
C1A26 While engine switch is on (IG), video signal format malfunction or communication stop is detected between object recognition ECU and object recognition camera sensor for 1 second

  • Harness and connector

  • Object recognition camera sensor

  • Object recognition ECU

  • Driving support ECU

WIRING DIAGRAM

A001DPSE02
*a Object Recognition Camera Sensor
*b Object Recognition ECU

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (OBJECT RECOGNITION ECU - OBJECT RECOGNITION CAMERA SENSOR)

    A001D6OE03
    *1 Front view of wire harness connector: (to Object Recognition ECU)
    *2 Front view of wire harness connector: (to Object Recognition Camera Sensor)

    1. Disconnect the R58 ECU connector.

    2. Disconnect the X15 sensor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      R58-1 (GVIF) - X15-1 (GVIF) Always Below 1 Ω
      R58-1 (GVIF) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. REPLACE OBJECT RECOGNITION CAMERA SENSOR


    1. Replace the object recognition camera sensor Click here.


    NEXT

  3. ADJUST OBJECT RECOGNITION CAMERA SENSOR


    1. Adjust the object recognition camera sensor Click here.


    NEXT

  4. CHECK OBJECT RECOGNITION ECU


    1. Using the intelligent tester, enter the following menus: Body / Pre-Crash2 /. Then select "Diagnostic Code".

    2. Select "Clear" and clear the data.

    3. Recheck for DTC.

      OK
      DTC C1A26 is not output.

    OK

    END

    NG

  5. REPLACE OBJECT RECOGNITION ECU


    1. Replace the object recognition ECU Click here.


    NEXT

  6. ADJUST OBJECT RECOGNITION CAMERA SENSOR


    1. Adjust the object recognition camera sensor Click here.


    NEXT

  7. CHECK DRIVING SUPPORT ECU


    1. Using the intelligent tester, enter the following menus: Body / Pre-Crash2 /. Then select "Diagnostic Code".

    2. Select "Clear" and clear the data.

    3. Recheck for DTC.

      OK
      DTC C1A26 is not output.

    OK

    END

    NG

    REPLACE DRIVING SUPPORT ECU Click here