Dtc C1681 Front Camera Feedback Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

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, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display). 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 (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 wide view front monitor system may be needed (LandCruiser RM0000035DD06LX.html).
1.CHECK FOR DTC

  1. Clear the DTCs (LandCruiser RM000003EB400YX.html).

  1. Check for DTCs (LandCruiser RM000003EB400YX.html).

    Result
    Result
    		Proceed to
    DTC C1681 and C1682 are not output
    		A
    DTC C1681 and/or C1682 is output
    		B


B
Go to step 2
A

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

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

  1. Disconnect the I6 and I7 parking assist ECU connectors.

  1. Disconnect the A52 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
    I7-36 (BCV-) - A52-4 (BCV-)
    		Always
    		Below 1 Ω
    I7-12 (BCV+) - A52-2 (BCV+)
    		Always
    		Below 1 Ω
    I7-35 (BGND) - A52-3 (BGND)
    		Always
    		Below 1 Ω
    I7-11 (BCB+) - A52-1 (BCB+)
    		Always
    		Below 1 Ω
    I7-36 (BCV-) - Body ground
    		Always
    		10 kΩ or higher
    I7-12 (BCV+) - Body ground
    		Always
    		10 kΩ or higher
    I7-35 (BGND) - Body ground
    		Always
    		10 kΩ or higher
    I7-11 (BCB+) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK PARKING ASSIST ECU (BCB+, BGND)


    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 C1681 Front Camera Feedback Malfunction

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    I7-35 (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
    I7-11 (BCB+) - I7-35 (BGND)
    		Engine switch on (IG), wide view front and side monitor switch on
    		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


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


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


    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 C1681 Front Camera Feedback Malfunction


    Text in Illustration
    *a
    		Component with harness connected
    (Parking Assist ECU)
    		*b
    		Waveform A
    *c
    		Waveform B
    		*d
    		Synchronized 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.
    OK:
    Waveform is as shown in the illustration.
    Item
    		Content
    Terminal No. (Symbol)
    		I7-12 (BCV+) - I7-35 (BGND)
    Tool Setting
    		200 mV/DIV., 50 μsec./DIV.
    Condition
    1. Waveform A: Engine switch on (IG), wide view front and side monitor switch on and camera lens is not covered, displaying an image
    2. Waveform B: Engine switch on (IG), wide view front and side monitor switch on and camera lens is covered, blacking out the screen
Result
Proceed to
Result
OK (for LHD)
A
OK (for RHD)
B
NG
C


B
REPLACE PARKING ASSIST ECU (LandCruiser RM00000470500OX.html)

C
REPLACE FRONT TELEVISION CAMERA ASSEMBLY (LandCruiser RM00000470L00JX.html)
A

REPLACE PARKING ASSIST ECU (LandCruiser RM00000466X026X.html)