Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Side Camera Feedback Malfunction (C1683)

DESCRIPTION

This DTC 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 passenger side television camera assembly to the parking assist ECU.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1683

Side Camera Feedback Malfunction

Side camera feedback malfunction

  • Harness or connector
  • Parking assist ECU
  • Outer rear view mirror assembly RH
    • Side television camera assembly RH
    • Outer mirror retractor RH*
  • *: w/ Power Retract Mirror

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

  • 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

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs.

Chassis > Circumference Monitoring Camera Control Module > Clear DTCs

(b) Check for DTCs.

Chassis > Circumference Monitoring Camera Control Module > Trouble Codes

OK:

DTC C1683 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - OUTER REAR VIEW MIRROR ASSEMBLY RH)

(a) Disconnect the J158 parking assist ECU connector.

(b) Disconnect the M1 outer rear view mirror assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J158-40 (RCB+) - M1-2 (RCB+)

Always

Below 1 Ω

J158-38 (RCV+) - M1-7 (RCV+)

Always

Below 1 Ω

J158-16 (RCV-) - M1-6 (RCV-)

Always

Below 1 Ω

J158-17 (RGND) - M1-1 (RGND)

Always

Below 1 Ω

J158-39 (SGND) - Body ground

Always

Below 1 Ω

J158-40 (RCB+) or M1-2 (RCB+) - Body ground

Always

10 kΩ or higher

J158-38 (RCV+) or M1-7 (RCV+) - Body ground

Always

10 kΩ or higher

J158-16 (RCV-) or M1-6 (RCV-) - Body ground

Always

10 kΩ or higher

J158-17 (RGND) or M1-1 (RGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK PARKING ASSIST ECU (RCV-, RGND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J158-17 (RGND) - Body ground

Always

Below 1 Ω

J158-16 (RCV-) - Body ground

Always

Below 1 Ω

*a

Component without harness connected

(Parking Assist ECU)

NG

REPLACE PARKING ASSIST ECU

OK

4.

CHECK PARKING ASSIST ECU (RCB+, RGND)

(a) Connect the J158 parking assist ECU connector.

*a

Component with harness connected

(Parking Assist ECU)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

J158-40 (RCB+) - J158-17 (RGND)

Engine switch on (IG)

5.5 to 7.05 V

NG

REPLACE PARKING ASSIST ECU

OK

5.

CHECK SIDE TELEVISION CAMERA ASSEMBLY RH (RCV+, RGND)

(a) Connect the M1 outer rear view mirror assembly RH connector.

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

HINT:

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

*a

Component with harness connected

(Parking Assist ECU)

*b

Waveform 1

*c

Waveform 2

*d

Synchronization Signal

*e

Video Waveform

-

-

Measurement Condition

Item

Content

Tester Connection

J158-38 (RCV+) - J158-17 (RGND)

Tool Setting

200 mV/DIV., 50 μs./DIV.

Condition

  • Waveform 1: Engine switch on (IG), panoramic view monitor main switch (integration control and panel assembly) on, camera lens not covered, displaying image
  • Waveform 2: Engine switch on (IG), panoramic view monitor main switch (integration control and panel assembly) on, camera lens covered, blacking out screen

HINT:

  • The video waveform changes according to the image sent by the side television camera assembly RH.
  • The video waveform is constantly output when the engine switch is on (ACC).

OK:

Waveform is similar to that shown in illustration.

OK

REPLACE PARKING ASSIST ECU

NG

6.

REPLACE SIDE TELEVISION CAMERA ASSEMBLY RH

(a) Replace the side television camera assembly RH with a new or normally functioning one.

Click here

NEXT

7.

CHECK FOR DTC

(a) Clear the DTCs.

Chassis > Circumference Monitoring Camera Control Module > Clear DTCs

(b) Check for DTCs.

Chassis > Circumference Monitoring Camera Control Module > Trouble Codes

OK:

DTC C1683 is not output.

Result

Proceed to

OK

A

NG (w/ Power Retract Mirror)

B

NG (w/o Power Retract Mirror)

C

A

END (SIDE TELEVISION CAMERA ASSEMBLY RH WAS DEFECTIVE)

B

REPLACE OUTER MIRROR RETRACTOR RH

C

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

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