MULTI-TERRAIN 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 ifs 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 Code DTC Detection Condition Trouble Area
C1681 Front television camera power supply failure

  • Harness or connector

  • Front television camera assembly

  • Parking assist ECU

WIRING DIAGRAM

B001VSFE06

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 multi-terrain monitor system may be needed Click here.

PROCEDURE


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


    1. Disconnect the F76 parking assist ECU connector.

    2. Disconnect the A71 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
      F76-36 (BCV-) - A71-2 (BCV-) Always Below 1 Ω
      F76-12 (BCV+) - A71-3 (BCV+) Always Below 1 Ω
      F76-35 (BGND) - A71-5 (BGND) Always Below 1 Ω
      F76-11 (BCB+) - A71-6 (BCB+) Always Always
      F76-34 (SGND) - Body ground Always Always
      F76-36 (BCV-) - Body ground Always 10 kΩ or higher
      F76-12 (BCV+) - Body ground Always 10 kΩ or higher
      F76-35 (BGND) - Body ground Always 10 kΩ or higher
      F76-11 (BCB+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B001XEHE16
      Text in Illustration
      *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
      35 (BGND) - Body ground Always Below 1 Ω
      36 (BCV-) - Body ground Always Below 1 Ω

    NG

    REPLACE PARKING ASSIST ECU Click here

    OK

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


    1. B001VKAE02
      Text in Illustration
      *a

      Component with harness connected

      (Parking Assist ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-35 (BGND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F76-11 (BCB+) - F76-35 (BGND) Engine switch on (IG) 5.5 to 7.05 V

    NG

    REPLACE PARKING ASSIST ECU Click here

    OK

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


    1. Check the ware form of the front television camera assembly using an oscilloscope.

      B001VLFE06
      Text in Illustration
      *a

      Component with harness connected

      (Parking Assist ECU)

      		 *b Waveform A
      *c Waveform B *d Synchronization Signal
      *e Video Waveform - -

      Tech Tips

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

      Item Content
      Terminal No. (Symbol) F76-12 (BCV+) - F76-35 (BGND)
      Tool Setting 200 mV/DIV., 50 μsec./DIV.
      Condition

      • Waveform A: Engine switch on (IG), main switch assembly (multi-terrain monitor main switch) on and camera lens is not covered, displaying an image

      • Waveform B: Engine switch on (IG), main switch assembly (multi-terrain monitor main switch) on and camera lens is covered, blacking out the screen
      OK
      Waveform is as shown in the illustration.

    OK

    REPLACE PARKING ASSIST ECU Click here

    NG

    REPLACE FRONT TELEVISION CAMERA ASSEMBLY Click here