Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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 camera assembly to the parking assist ECU.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1687	Over Current Detected in Driver Side Camera	Side camera current malfunction	Harness or connector Parking assist ECU Outer rear view mirror assembly LH Side television camera assembly LH Outer mirror retractor LH*

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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 C1687 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 J158 parking assist ECU connector.

(b) Disconnect the N1 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
J158-12 (LCB+) - N1-2 (LCB+)	Always	Below 1 Ω
J158-35 (LGND) - N1-1 (LGND)	Always	Below 1 Ω
J158-12 (LCB+) or N1-2 (LCB+) - Body ground	Always	10 kΩ or higher
J158-35 (LGND) or N1-1 (LGND) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.	CHECK PARKING ASSIST ECU (LCB+, LGND)

(a) Connect the J158 parking assist ECU connector.

*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
J158-35 (LGND) - Body ground	Always	Below 1 Ω

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
J158-12 (LCB+) - J158-35 (LGND)	Engine switch on (IG)	5.5 to 7.05 V

NG

REPLACE PARKING ASSIST ECU

OK

4.	REPLACE SIDE TELEVISION CAMERA ASSEMBLY LH

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

Click here

NEXT

5.	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 C1687 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 LH WAS DEFECTIVE)

B

REPLACE OUTER MIRROR RETRACTOR LH

C

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH