Dtc C1681 Front Camera Feedback Malfunction

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200
Park Assist Monitoring. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK PARKING ASSIST ECU (BCB+, BGND)

CHECK FRONT TELEVISION CAMERA ASSEMBLY (BCV+, BGND)

DTC C1681 Front Camera Feedback Malfunction

DTC C1682 Front Camera Current Malfunction


DESCRIPTION

DTC C1681 is stored if the parking assist ECU judges as a result of its 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 C1682 is stored if the parking assist ECU judges as a result of its self check that there is a problem with the current supplied from the front television camera assembly connected to the parking assist ECU.

DTC Code
DTC Detection Condition
Trouble Area
C1681
Front television camera power supply failure
  1. Harness or connector
  2. Front television camera assembly
  3. Parking assist ECU
C1682
An open or short in the front television camera signal circuit

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Park Assist Monitoring.Toyota Parking Assist-Sensor System. Dtc C1681 Front Camera Feedback Malfunction


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 (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 wide view front monitor system may be needed (Click here).
1.CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY AND BODY GROUND)

  1. Disconnect the F75 and F76 parking assist ECU connectors.

  1. Disconnect the A55 front television camera assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F76-36 (BCV-) - A55-4 (BCV-)
    		Always
    		Below 1 Ω
    F76-12 (BCV+) - A55-2 (BCV+)
    		Always
    		Below 1 Ω
    F76-35 (BGND) - A55-3 (BGND)
    		Always
    		Below 1 Ω
    F76-11 (BCB+) - A55-1 (BCB+)
    		Always
    		Always
    F75-4 (GND1) - 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 (BCB+, BGND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Park Assist Monitoring.Toyota Parking Assist-Sensor System. Dtc C1681 Front Camera Feedback Malfunction

  1. Reconnect the F75 and F76 parking assist ECU connectors.

  1. 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

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    F76-11 (BCB+) - F76-35 (BGND)
    		Engine switch on (IG), front and side monitor main switch assembly on
    		5.5 to 7.05 V
Text in Illustration
*a
Component with harness connected
(Parking Assist ECU)


NG
REPLACE PARKING ASSIST ECU (Click here)
OK


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


  1. Reconnect the A55 front television camera assembly connector.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Park Assist Monitoring.Toyota Parking Assist-Sensor System. Dtc C1681 Front Camera Feedback Malfunction


    Text in Illustration
    *a
    		Component with harness connected
    (Parking Assist ECU)
    		*b
    		Waveform A
    *c
    		Waveform B
    		*d
    		Synchronization Signal
    *e
    		Video Waveform
    		-
    		-
    HINT:
    1. A waterproof connector is used for the front television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.
    2. The video waveform changes according to the image sent by the front television camera assembly.

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

    OK:
    Waveform is as shown in the illustration.
    Item
    		Content
    Terminal No. (Symbol)
    		F76-12 (BCV+) - F76-35 (BGND)
    Tool Setting
    		200 mV/DIV., 50 μsec./DIV.
    Condition
    1. Waveform A: Engine switch on (IG), front and side monitor main switch assembly on and camera lens is not covered, displaying an image
    2. Waveform B: Engine switch on (IG), front and side monitor main switch assembly on and camera lens is covered, blacking out the screen


NG
REPLACE FRONT TELEVISION CAMERA ASSEMBLY (Click here)
OK

REPLACE PARKING ASSIST ECU (Click here)