DTC    C1621    Back Camera Power Supply Failure

DTC    C1622    Open or Short Circuit in Back Camera Signal

for Preparation Click here


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
  1. Harness or connector
  2. Rear television camera assembly
  3. Parking assist ECU
C1622
Open or short in the rear television camera signal circuit
  1. Harness or connector
  2. Rear television camera assembly
  3. Parking assist ECU

WIRING DIAGRAM


E182455E04


INSPECTION PROCEDURE

NOTICE:
  1. 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).
  2. 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).
  3. 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).

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

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

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

  1. 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)


    E160600E15

  1. Reconnect the H8 connector to the parking assist ECU.

  1. 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

    Text in Illustration 
    *a
    		Component with harness connected
    (Parking Assist ECU)



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.

  1. 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.



    E159998E15

  1. Reconnect the H9 connector to the parking assist ECU.
    Text in Illustration 
    *a
    		Component with harness connected
    (Parking Assist ECU)



    E171712E13

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

    HINT:
    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

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

    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



NG
REPLACE REAR TELEVISION CAMERA ASSEMBLY (Click here)
OK

REPLACE PARKING ASSIST ECU (Click here)