Lexus ES manuals

Lexus ES: Driver Side Camera Video Sync Signal Malfunction (C1686)

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 driver side television camera assembly to the parking assist ECU.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1686

Driver Side Camera Video Sync Signal Malfunction

Side camera feedback malfunction

  • Harness or connector
  • Parking assist ECU
  • Side television camera assembly LH
  • Outer rear view mirror assembly LH

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.
  • 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 C1686 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

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

(a) Disconnect the N43 parking assist ECU connector.

(b) Disconnect the J34 outer rear view mirror assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N43-12 (LCB+) - J34-2 (LCB+)

Always

Below 1 Ω

N43-10 (LCV+) - J34-7 (LCV+)

Always

Below 1 Ω

N43-34 (LCV-) - J34-6 (LCV-)

Always

Below 1 Ω

N43-35 (LGND) - J34-1 (LGND)

Always

Below 1 Ω

N43-11 (SGND) - J34-3 (SGND)

Always

Below 1 Ω

N43-12 (LCB+) or J34-2 (LCB+) - Body ground

Always

10 kΩ or higher

N43-10 (LCV+) or J34-7 (LCV+) - Body ground

Always

10 kΩ or higher

N43-34 (LCV-) or J34-6 (LCV-) - Body ground

Always

10 kΩ or higher

N43-35 (LGND) or J34-1 (LGND) - Body ground

Always

10 kΩ or higher

N43-11 (SGND) or J34-3 (SGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK PARKING ASSIST ECU (LCV-, LGND)

(a) Disconnect the N43 parking assist ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

35 (LGND) - Body ground

Always

Below 1 Ω

34 (LCV-) - 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 (LCB+, LGND)

(a) Remove the parking assist ECU with the connector still connected.

*a

Component with harness connected

(Parking Assist ECU)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N43-35 (LGND) - 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

N43-12 (LCB+) - N43-35 (LGND)

Engine switch on (IG)

5.5 to 7.05 V

NG

REPLACE PARKING ASSIST ECU

OK

5.

CHECK SIDE TELEVISION CAMERA ASSEMBLY LH (LCV+, LGND)

(a) Remove the parking assist ECU with the connector still connected.

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

HINT:

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

*a

Component with harness connected

(Parking Assist ECU)

*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 side television camera assembly LH.
  • The video waveform is constantly output when the engine switch is on (ACC).
Measurement Condition

Item

Content

Tester Connection

N43-10 (LCV+) - N43-35 (LGND)

Tool Setting

200 mV/DIV., 50 μsec./DIV.

Condition

Engine switch on (IG), panoramic view monitor system operating

OK:

Waveform is similar to that shown in illustration.

OK

REPLACE PARKING ASSIST ECU

NG

6.

CHECK TELEVISION CAMERA ASSEMBLY SIDE LH

(a) Replace the side television camera assembly LH 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 C1686 is not output.

OK

END (SIDE TELEVISION CAMERA ASSEMBLY LH IS DEFECTIVE)

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

READ NEXT:

 Over Current Detected in Driver Side Camera (C1687)

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 driver side television camer

 Back Camera Initialization Incomplete (C1691)

DESCRIPTION This DTC is stored when the rear television camera assembly judges that the back camera initial setting has not been memorized (rear television camera assembly optical axis adjustment (bac

 Steering Angle Initialization Incomplete (C1694)

DESCRIPTION This DTC is stored when the parking assist ECU judges that the maximum steering angle has not been memorized (steering angle setting is incomplete). This DTC is stored when the rear t

SEE MORE:

 Check Assist Limit Record

CAUTION / NOTICE / HINT HINT: Perform this troubleshooting procedure when no DTCs are output, including DTCs related to CAN communication system malfunctions. PROCEDURE 1. READ VALUE USING GTS (ASSIST LIMIT RECORD 1) (a) Using the GTS, read the Data List item "Assist Limit Record 1". Click

 Door Mirror ECU LH Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Door Mirror ECU LH Communication Stop Mode Any of the following conditions are met: Communication stop for "Front Door LH/L-Mirror (FL-Door/L-Mirror)" is indicated on the "Communication Bus Check" screen of the Techstream. Click here

© 2016-2023 Copyright www.lexguide.net