Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001RE86
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM: C1681; Front Camera Feedback Malfunction; 2021 - 2024 MY Camry [10/2020 -        ]

DTC

C1681

Front Camera Feedback Malfunction

DESCRIPTION

DTC C1681 is stored if the television camera controller 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 television camera controller.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1681

Front Camera Feedback Malfunction

Front television camera power supply failure

  • Harness or connector
  • Front television camera assembly
  • Television camera controller

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When "!" is displayed on the radio and display receiver assembly after the cable is disconnected from the negative (-) battery terminal, correct the steering angle neutral point.

    Click here 2021 - 2024 MY Camry [10/2020 -        ]; PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM: INITIALIZATION

  • 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 panoramic view monitor system may be needed.

    Click here 2021 - 2024 MY Camry [10/2020 -        ]; PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM: CALIBRATION

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (TELEVISION CAMERA CONTROLLER - FRONT TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the R126 television camera controller connector.

(b) Disconnect the B12 front television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R126-15 (BCB+) - B12-6 (BCB+)

Always

Below 1 Ω

R126-36 (BCV+) - B12-3 (BCV+)

Always

Below 1 Ω

R126-13 (BCV-) - B12-2 (BCV-)

Always

Below 1 Ω

R126-37 (BGND) - B12-5 (BGND)

Always

Below 1 Ω

R126-14 (SGND) - Body ground

Always

10 kΩ or higher

R126-15 (BCB+) or B12-6 (BCB+) - Body ground

Always

10 kΩ or higher

R126-36 (BCV+) or B12-3 (BCV+) - Body ground

Always

10 kΩ or higher

R126-13 (BCV-) or B12-2 (BCV-) - Body ground

Always

10 kΩ or higher

R126-37 (BGND) or B12-5 (BGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK TELEVISION CAMERA CONTROLLER (BCV-, BGND)

(a) Disconnect the R126 television camera controller connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

37 (BGND) - Body ground

Always

Below 1 Ω

13 (BCV-) - Body ground

Always

Below 1 Ω

*a

Component without harness connected

(Television Camera Controller)

NG

REPLACE TELEVISION CAMERA CONTROLLER

OK

3.

CHECK TELEVISION CAMERA CONTROLLER (BCB+, BGND)

(a) Remove the television camera controller with the connector still connected.

*a

Component with harness connected

(Television Camera Controller)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R126-37 (BGND) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

R126-15 (BCB+) - R126-37 (BGND)

Ignition switch ON

5.5 to 7.05 V

R126-15 (BCB+) - R126-37 (BGND)

Ignition switch off

Below 1 V

NG

REPLACE TELEVISION CAMERA CONTROLLER

OK

4.

CHECK FRONT TELEVISION CAMERA ASSEMBLY (BCV+, BGND)

(a) Remove the television camera controller with the connector still connected.

(b) Using an oscilloscope, check the waveform of the front television camera assembly.

HINT:

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

*a

Component with harness connected

(Television Camera Controller)

*b

Waveform 1 (camera lens not covered, displaying an image)

*c

Waveform 2 (camera lens covered, blacking out the screen)

*d

Synchronization Signal

*e

Video Waveform

-

-

HINT:

  • The video waveform changes according to the image sent by the front television camera assembly.
  • The video waveform is constantly output when the ignition switch is turned to ACC.

Measurement Condition

Item

Content

Terminal No. (Symbol)

R126-36 (BCV+) - R126-37 (BGND)

Tool Setting

200 mV/DIV., 50 μsec./DIV.

Condition

Ignition switch ON, panoramic view monitor system operating

OK:

Waveform is similar to that shown in the illustration.

OK

REPLACE TELEVISION CAMERA CONTROLLER

NG

REPLACE FRONT TELEVISION CAMERA ASSEMBLY