PARKING ASSIST MONITOR SYSTEM, Diagnostic DTC:C1621, C1622

DTC Code DTC Name
C1621 Back Camera Power Supply Failure
C1622 Open or Short Circuit in Back Camera Signal

DESCRIPTION

These DTCs are stored if the parking assist ECU judges that the signals or signal lines between the parking assist ECU and the rear television camera assembly are not normal as a result of its self check.

DTC No. DTC Detection Condition Trouble Area
C1621 Rear television camera power supply failure

  • Harness or connector

  • Rear television camera assembly

  • Parking assist ECU
C1622 Open or short in the rear television camera signal circuit

  • Harness or connector

  • Rear television camera assembly

  • Parking assist ECU

WIRING DIAGRAM

A003X8BE04

INSPECTION PROCEDURE

Note


  • When "System initializing" is displayed on the multi-display after disconnecting the cable from the negative (-) auxiliary 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 parking assist monitor system may be needed Click here.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE


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


    1. Disconnect the H8 connector from the parking assist ECU.

    2. Disconnect the V8 connector from the rear television camera assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H8-11 (CV-) - V8-1 (CV-) Always Below 1 Ω
      H8-12 (CV+) - V8-2 (CV+) Always Below 1 Ω
      H8-13 (CGND) - V8-3 (CGND) Always Below 1 Ω
      H8-14 (CB+) - V8-4 (CB+) Always Below 1 Ω
      H8-11 (CV-) - Body ground Always 10 kΩ or higher
      H8-12 (CV+) - Body ground Always 10 kΩ or higher
      H8-13 (CGND) - Body ground Always 10 kΩ or higher
      H8-14 (CB+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK PARKING ASSIST ECU (CV-, CGND)


    1. A003VQ3E15
      Text in Illustration
      *a

      Component with harness connected

      (Parking Assist ECU)

      Reconnect the H8 connector to the parking assist ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H8-11 (CV-) - Body ground Always Below 1 Ω
      H8-13 (CGND) - Body ground Always Below 1 Ω

    NG

    REPLACE PARKING ASSIST ECU Click here

    OK

  3. CHECK REAR TELEVISION CAMERA ASSEMBLY (CB+, CGND)


    1. Disconnect the V8 connector from the rear television camera assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      V8-4 (CB+) - V8-3 (CGND)

      Power switch on (READY)

      Reverse (R) selected

      		 5.5 to 7.0 V

    NG

    REPLACE PARKING ASSIST ECU Click here

    OK

  4. CHECK PARKING ASSIST ECU (CV+, GND1)


    1. Reconnect the V8 connector to the rear television camera assembly.

    2. A003YG1E15
      Text in Illustration
      *a

      Component with harness connected

      (Parking Assist ECU)

      Reconnect the H9 connector to the parking assist ECU.

    3. A003ZLFE13
      Text in Illustration
      *a Waveform 1 (camera lens is not covered, displaying an image)
      *b Waveform 2 (camera lens is covered, blacking out the screen)
      *c Synchronization Signal
      *d Video Waveform

      Check the waveform of the rear television camera assembly using an oscilloscope.

      Tech Tips

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

      OK
      Waveform is similar to that shown in the illustration.
      Item Content
      Terminal No. (Symbol) H8-12 (CV+) - H9-3 (GND1)
      Tool Setting 200 mV/DIV., 50 μsec./DIV.
      Condition Power switch on (READY), reverse (R) selected

      Tech Tips

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


    NG

    REPLACE REAR TELEVISION CAMERA ASSEMBLY Click here

    OK

    REPLACE PARKING ASSIST ECU Click here