REAR VIEW MONITOR SYSTEM, Diagnostic DTC:C1622

DTC Code DTC Name
C1622 Open or Short Circuit in Back Camera Signal

DESCRIPTION

This DTC is stored if the radio and display receiver assembly judges as a result of its self check that the signals or signal lines between the radio and display receiver assembly and the rear television camera assembly are not normal.

DTC Code

DTC Detection Condition

Trouble Area

C1622

Open or Short Circuit in television camera signal

  • Harness or connector

  • Rear television camera assembly

  • Radio and display receiver assembly

WIRING DIAGRAM

E224825E12

PROCEDURE

  1. CHECK FOR DTC

    1. Clear the DTCs (Click here).

    2. Check for DTCs (Click here).

      Table 1. Result

      Result

      Proceed to

      No DTC is output

      A

      DTC is output

      B

    USE SIMULATION METHOD TO CHECK

    (Click here)

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)

    1. Disconnect the H123 radio and display receiver assembly connector.

    2. Disconnect the S13 rear television camera assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H123-11 (CA+) - S13-6 (CB+)

      Always

      Below 1 Ω

      H123-12 (V+) - S13-3 (CV+)

      Always

      Below 1 Ω

      H123-23 (CGND) - S13-5 (CGND)

      Always

      Below 1 Ω

      H123-24 (V-) - S13-2 (CV-)

      Always

      Below 1 Ω

      H123-11 (CA+) - Body ground

      Always

      10 kΩ or higher

      H123-12 (V+) - Body ground

      Always

      10 kΩ or higher

      H123-23 (CGND) - Body ground

      Always

      10 kΩ or higher

      H123-24 (V-) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

    1. U124076E02

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H123-23 (CGND) - Body ground

      Always

      Below 1 Ω

      H123-24 (V-) - 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

      H123-11 (CA+) - Body ground

      Ignition switch ON

      5.5 to 7.05 V
    Table 2. Text in Illustration

    *a

    Component with harness connected

    (Radio and Display Receiver Assembly)

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    (Click here)

  4. CHECK REAR TELEVISION CAMERA ASSEMBLY

    1. Using an oscilloscope, check the waveform.

      U124068E02
      Table 3. Text in Illustration

      *a

      Component with harness connected

      (Radio and Display Receiver Assembly)

      *b

      Waveform 1

      *c

      Waveform 2

      *d

      Synchronized Signal

      *e

      Video Waveform

      -

      -
      Table 4. Measurement Condition

      Item

      Content

      Tester Connection

      H123-12 (V+) - H123-23 (CGND)

      Tool Setting

      200 mV/DIV., 50 μs/DIV.

      Condition

      • Waveform 1: Ignition switch ON, camera lens not covered, displaying an image

      • Waveform 2: Ignition switch ON, camera lens covered, blacking out screen

      OK

      Waveform is as shown in illustration.

      Tip:

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

    USE SIMULATION METHOD TO CHECK

    (Click here)

  5. REPLACE REAR TELEVISION CAMERA ASSEMBLY

    1. Replace the rear television camera assembly with a new or normally functioning one (Click here).

  6. CHECK FOR DTC

    1. Clear the DTCs (Click here).

    2. Check for DTCs (Click here).

    END (REAR TELEVISION CAMERA ASSEMBLY WAS DEFECTIVE)

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    (Click here)