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	Harness or connector Front television camera assembly Parking assist ECU
C1682	An open or short in the front television camera signal circuit

WIRING DIAGRAM

Dtc C1681 Front Camera Feedback Malfunction. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

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 ().

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 ().

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

Disconnect the F75 and F76 parking assist ECU connectors.

Disconnect the A55 front television camera assembly connector.

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

Dtc C1681 Front Camera Feedback Malfunction. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Reconnect the F75 and F76 parking assist ECU connectors.

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

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)

REPLACE PARKING ASSIST ECU ()

OK

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

Reconnect the A55 front television camera assembly connector.

Dtc C1681 Front Camera Feedback Malfunction. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

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

HINT:

A waterproof connector is used for the front television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.

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

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	Waveform A: Engine switch on (IG), front and side monitor main switch assembly on and camera lens is not covered, displaying an image Waveform B: Engine switch on (IG), front and side monitor main switch assembly on and camera lens is covered, blacking out the screen

REPLACE FRONT TELEVISION CAMERA ASSEMBLY ()

REPLACE PARKING ASSIST ECU ()