Dtc C1622 Open Or Short Circuit In Back Camera Signal


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - REAR TELEVISION CAMERA ASSEMBLY AND BODY GROUND)

CHECK PARKING ASSIST ECU (CB+, CGND)

CHECK REAR TELEVISION CAMERA ASSEMBLY (CV+, CGND)

DTC C1622 Open or Short Circuit in Back Camera Signal


DESCRIPTION

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

DTC Code
DTC Detection Condition
Trouble Area
C1622
An 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


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display). Dtc C1622 Open Or Short Circuit In Back Camera Signal


INSPECTION PROCEDURE

NOTICE:
  1. When "System initializing" is displayed on the parking assist ECU after the cable is disconnected from the negative (-) battery terminal, correct the steering angle neutral point (LandCruiser RM0000035DE05TX.html).
  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 (LandCruiser RM0000035DD06LX.html).
1.CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - REAR TELEVISION CAMERA ASSEMBLY AND BODY GROUND)

  1. Disconnect the I7 parking assist ECU connector.

  1. Disconnect the X9*1 or v2*2 rear television camera assembly connector.

    1. *1: w/ Tire Carrier
    2. *2: w/o Tire Carrier

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

    Standard Resistance:
    w/ Tire Carrier
    Tester Connection
    		Condition
    		Specified Condition
    I7-38 (CV-) - X9-2 (CV-)
    		Always
    		Below 1 Ω
    I7-15 (CV+) - X9-3 (CV+)
    		Always
    		Below 1 Ω
    I7-14 (CB+) - X9-6 (CB+)
    		Always
    		Below 1 Ω
    I7-37 (CGND) - X9-5 (CGND)
    		Always
    		Below 1 Ω
    I7-38 (CV-) - Body ground
    		Always
    		10 kΩ or higher
    I7-15 (CV+) - Body ground
    		Always
    		10 kΩ or higher
    I7-14 (CB+) - Body ground
    		Always
    		10 kΩ or higher
    I7-37 (CGND) - Body ground
    		Always
    		10 kΩ or higher
    w/o Tire Carrier
    Tester Connection
    		Condition
    		Specified Condition
    I7-38 (CV-) - v2-2 (CV-)
    		Always
    		Below 1 Ω
    I7-15 (CV+) - v2-3 (CV+)
    		Always
    		Below 1 Ω
    I7-14 (CB+) - v2-6 (CB+)
    		Always
    		Below 1 Ω
    I7-37 (CGND) - v2-5 (CGND)
    		Always
    		Below 1 Ω
    I7-38 (CV-) - Body ground
    		Always
    		10 kΩ or higher
    I7-15 (CV+) - Body ground
    		Always
    		10 kΩ or higher
    I7-14 (CB+) - Body ground
    		Always
    		10 kΩ or higher
    I7-37 (CGND) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK PARKING ASSIST ECU (CB+, CGND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display). Dtc C1622 Open Or Short Circuit In Back Camera Signal

  1. Reconnect the I7 parking assist ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    I7-37 (CGND) - Body ground
    		Always
    		Below 1 Ω
    I7-38 (CV-) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    I7-14 (CB+) - Body ground
    		Engine switch on (IG)
    		5.5 to 7.05 V
Text in Illustration
*a
Component with harness connected
(Parking Assist ECU)
Result
Proceed to
Result
OK
A
NG (for LHD)
B
NG (for RHD)
C


B
REPLACE PARKING ASSIST ECU (LandCruiser RM00000466X026X.html)

C
REPLACE PARKING ASSIST ECU (LandCruiser RM00000470500OX.html)
A


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

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display). Dtc C1622 Open Or Short Circuit In Back Camera Signal


Text in Illustration
*a
Component with harness connected
(Parking Assist ECU)
*b
Waveform A
*c
Waveform B
*d
Synchronized Signal
*e
Video Waveform
-
-

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

    HINT:
    1. A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the navigation receiver assembly*1 or radio and display receiver assembly*2 with the connector connected.
      1. *1: for Navigation Receiver Type
      2. *2: for Radio and Display Type
    2. The video waveform changes according to the image sent by the rear television camera assembly.
    Item
    		Content
    Terminal No. (Symbol)
    		I7-15 (CV+) - I7-37 (CGND)
    Tool Setting
    		200 mV/DIV., 50 μsec./DIV.
    Condition
    1. Waveform A: Engine switch on (IG), camera lens is not covered, displaying an image
    2. Waveform B: Engine switch on (IG), camera lens is covered, blacking out the screen
    OK:
    Waveform is as shown in the illustration.
Result
Proceed to
Result
OK (for LHD)
A
OK (for RHD)
B
NG (w/ Tire Carrier)
C
NG (w/o Tire Carrier)
D


B
REPLACE PARKING ASSIST ECU (LandCruiser RM00000470500OX.html)

C
REPLACE REAR TELEVISION CAMERA ASSEMBLY (LandCruiser RM00000470R008X.html)

D
REPLACE REAR TELEVISION CAMERA ASSEMBLY (LandCruiser RM00000470R008X.html)
A

REPLACE PARKING ASSIST ECU (LandCruiser RM00000466X026X.html)