DTC C1686: Driver Side Camera Video Sync Signal Malfunction [11/2018 - 10/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK FOR DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [11/2018 - 10/2022]

Chassis > Circumference Monitoring Camera Control Module > Clear DTCs

Check for DTCs.

Refer to DTC CHECK / CLEAR [11/2018 - 10/2022]

Chassis > Circumference Monitoring Camera Control Module > Trouble Codes

DTC C1686 is not output.

Result

Proceed to
OK
NG

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result:

See step 2

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

Disconnect the N24 parking assist ECU connector.
Disconnect the J13 outer rear view mirror assembly LH connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
N24-12 (LCB+) - J13-3 (LCB+)	Always	Below 1 Ω
N24-10 (LCV+) - J13-4 (LCV+)	Always	Below 1 Ω
N24-34 (LCV-) - J13-12 (LCV-)	Always	Below 1 Ω
N24-35 (LGND) - J13-11 (LGND)	Always	Below 1 Ω
N24-12 (LCB+) or J13-3 (LCB+) - Body ground	Always	10 kΩ or higher
N24-10 (LCV+) or J13-4 (LCV+) - Body ground	Always	10 kΩ or higher
N24-34 (LCV-) or J13-12 (LCV-) - Body ground	Always	10 kΩ or higher
N24-35 (LGND) or J13-11 (LGND) - Body ground	Always	10 kΩ or higher
N24-11 (SGND) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 3

CHECK PARKING ASSIST ECU (LCV-, LGND)

Disconnect the N24 parking assist ECU connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component without harness connected (Parking Assist ECU)

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

Result

Proceed to
OK
NG

Result:

REPLACE PARKING ASSIST ECU. Refer to REMOVAL [11/2018 - 10/2022]

Result:

See step 4

CHECK PARKING ASSIST ECU (LCB+, LGND)

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Parking Assist ECU)

Standard Resistance

Tester Connection	Condition	Specified Condition
N24-35 (LGND) - Body ground	Always	Below 1 Ω

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
N24-12 (LCB+) - N24-35 (LGND)	Power switch on (IG)	5.5 to 7.05 V
N24-12 (LCB+) - N24-35 (LGND)	Power switch off	Below 1 V

Result

Proceed to
OK
NG

Result:

REPLACE PARKING ASSIST ECU. Refer to REMOVAL [11/2018 - 10/2022]

Result:

See step 5

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

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.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*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 power switch is on (ACC).

MEASUREMENT CONDITION

Item	Content
Tester Connection	N24-10 (LCV+) - N24-35 (LGND)
Tool Setting	200 mV/DIV., 50 μsec./DIV.
Condition	Power switch on (IG), panoramic view monitor switch on

Waveform is similar to that shown in illustration.

Result

Proceed to
OK
NG

Result:

REPLACE PARKING ASSIST ECU. Refer to REMOVAL [11/2018 - 10/2022]

Result:

See step 6

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

Disconnect the outer rear view mirror assembly LH connector.

*a	Front view of wire harness connector (to Side Television Camera Assembly LH)
*b	Front view of wire harness connector (to Outer Rear View Mirror Assembly LH)

Disconnect the side television camera assembly LH connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A-1 (SCB+) - J13-3 (LCB+)	Always	Below 1 Ω
A-3 (SCV+) - J13-4 (LCV+)	Always	Below 1 Ω
A-7 (SCV-) - J13-12 (LCV-)	Always	Below 1 Ω
A-5 (SGND) - J13-11 (LGND)	Always	Below 1 Ω
A-1 (SCB+) or J13-3 (LCB+) - Body ground	Always	10 kΩ or higher
A-3 (SCV+) or J13-4 (LCV+) - Body ground	Always	10 kΩ or higher
A-7 (SCV-) or J13-12 (LCV-) - Body ground	Always	10 kΩ or higher
A-5 (SGND) or J13-11 (LGND) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH. Refer to REMOVAL [11/2018 - ]

Result:

See step 7

CHECK SIDE TELEVISION CAMERA ASSEMBLY LH

Replace the side television camera assembly LH with a new or normally functioning one.

Refer to REMOVAL [11/2018 - ]

Result

Proceed to
NEXT

Result:

See step 8

CHECK FOR DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [11/2018 - 10/2022]

Chassis > Circumference Monitoring Camera Control Module > Clear DTCs

Check for DTCs.

Refer to DTC CHECK / CLEAR [11/2018 - 10/2022]

Chassis > Circumference Monitoring Camera Control Module > Trouble Codes

DTC C1686 is not output.

Result

Proceed to
OK
NG

Result:

END (SIDE TELEVISION CAMERA ASSEMBLY LH IS DEFECTIVE)

Result:

REPLACE PARKING ASSIST ECU. Refer to REMOVAL [11/2018 - 10/2022]