PANORAMIC VIEW MONITOR SYSTEM, Diagnostic DTC:C1681

DTC Code DTC Name
C1681 Front Camera Feedback Malfunction

DESCRIPTION

DTC C1681 is stored if the parking assist ECU judges as a result of its self check that a synchronization problem is occurring in the image signal sent from the front television camera assembly to the parking assist ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1681 Front Camera Feedback Malfunction Front television camera power supply failure

  • Harness or connector

  • Front television camera assembly

  • Parking assist ECU

WIRING DIAGRAM

A002C1OE22

CAUTION / NOTICE / HINT

Note


  • When "!" mark is displayed on the multi-display after the cable is disconnected from the negative (-) battery terminal, correct the steering angle neutral point.

    Click here

  • Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the panoramic view monitor system may be needed.

    Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY)


    1. Disconnect the F130 parking assist ECU connector.

    2. Disconnect the A90 front television camera assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F130-15 (BCB+) - A90-6 (BCB+) Always Below 1 Ω
      F130-13 (BCV+) - A90-3 (BCV+) Always Below 1 Ω
      F130-14 (BCV-) - A90-2 (BCV-) Always Below 1 Ω
      F130-27 (BGND) - A90-5 (BGND) Always Below 1 Ω
      F130-15 (BCB+) or A90-6 (BCB+) - Body ground Always 10 kΩ or higher
      F130-13 (BCV+) or A90-3 (BCV+) - Body ground Always 10 kΩ or higher
      F130-14 (BCV-) or A90-2 (BCV-) - Body ground Always 10 kΩ or higher
      F130-27 (BGND) or A90-5 (BGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK PARKING ASSIST ECU (BCV-, BGND)


    1. Disconnect the F130 parking assist ECU connector.

    2. B003YXQC23
      *a

      Component without harness connected

      (Parking Assist ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      27 (BGND) - Body ground Always Below 1 Ω
      14 (BCV-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARKING ASSIST ECU Click here

    OK

  3. CHECK PARKING ASSIST ECU (BCB+, BGND)


    1. A002C8PC80
      *a

      Component with harness connected

      (Parking Assist ECU)

      Remove the parking assist ECU with the connector still connected.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F130-27 (BGND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F130-15 (BCB+) - F130-27 (BGND) Ignition switch ACC 5.5 to 7.05 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARKING ASSIST ECU Click here

    OK

  4. CHECK FRONT TELEVISION CAMERA ASSEMBLY (BCV+, BGND)


    1. Remove the parking assist ECU with the connector still connected.

    2. Using an oscilloscope, check the waveform of the front television camera assembly.

      Tech Tips

      A waterproof connector is used for the front television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.

      A0029OBC73
      *a

      Component with harness connected

      (Parking Assist ECU)

      		 *b Waveform 1 (camera lens not covered, displaying an image)
      *c Waveform 2 (camera lens covered, blacking out the screen) *d Synchronization Signal
      *e Video Waveform - -

      Tech Tips


      • The video waveform changes according to the image sent by the front television camera assembly.

      • The video waveform is constantly output when the ignition switch is ACC.

      Measurement Condition
      Item Content
      Terminal No. (Symbol) F130-13 (BCV+) - F130-27 (BGND)
      Tool Setting 200 mV/DIV., 50 μsec./DIV.
      Condition Ignition switch ON, panoramic view monitor switch on
      OK
      Waveform is similar to that shown in the illustration.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING ASSIST ECU Click here

    NG

    REPLACE FRONT TELEVISION CAMERA ASSEMBLY Click here