Lexus NX: Side Camera Current Malfunction (C1684)

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
C1684	Side Camera Current Malfunction	Side camera current malfunction	Harness or connector Parking assist ECU Side television camera assembly RH Outer mirror retractor RH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs.

Click here

Chassis > Panoramic View Monitor > Clear DTCs

(b) Check for DTCs.

Click here

Chassis > Panoramic View Monitor > Trouble Codes

OK:

DTC C1684 is not output.

Result	Proceed to
OK	A
NG	B

A

USE SIMULATION METHOD TO CHECK

B

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

(a) Disconnect the P45 parking assist ECU connector.

(b) Disconnect the L12*1 or L14*2 outer rear view mirror assembly RH connector.

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

Standard Resistance:

w/o Seat Memory

Tester Connection	Condition	Specified Condition
P45-40 (RCB+) - L12-5 (RCB+)	Always	Below 1 Ω
P45-17 (RGND) - L12-13 (RGND)	Always	Below 1 Ω
P45-40 (RCB+) or L12-5 (RCB+) - Body ground	Always	10 kΩ or higher
P45-17 (RGND) or L12-13 (RGND) - Body ground	Always	10 kΩ or higher

w/ Seat Memory

Tester Connection	Condition	Specified Condition
P45-40 (RCB+) - L14-2 (RCB+)	Always	Below 1 Ω
P45-17 (RGND) - L14-1 (RGND)	Always	Below 1 Ω
P45-40 (RCB+) or L14-2 (RCB+) - Body ground	Always	10 kΩ or higher
P45-17 (RGND) or L14-1 (RGND) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.	CHECK PARKING ASSIST ECU

(a) Disconnect the outer rear view mirror assembly RH 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
P45-17 (RGND) - 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
P45-40 (RCB+) - P45-17 (RGND)	Power switch on (IG)	5.5 to 7.05 V
P45-40 (RCB+) - P45-17 (RGND)	Power switch off	Below 1 V

NG

REPLACE PARKING ASSIST ECU

OK

4.	INSPECT OUTER MIRROR RETRACTOR RH

(a) Remove the outer mirror retractor RH. Click here

*A w/o Seat Memory *B w/ Seat Memory *a Front view of outer mirror retractor RH (to Side Television Camera Assembly RH) *b Front view of outer mirror retractor RH (to Vehicle Harness Connector)

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

Standard Resistance:

w/o Seat Memory

Tester Connection	Condition	Specified Condition
B-1 (SCB+) - 5 (RCB+)	Always	Below 1 Ω
B-5 (SGND) - 13 (RGND)	Always	Below 1 Ω
B-1 (SCB+) or 5 (RCB+) - Body ground	Always	10 kΩ or higher
B-5 (SGND) or 13 (RGND) - Body ground	Always	10 kΩ or higher

w/ Seat Memory

Tester Connection	Condition	Specified Condition
B-1 (SCB+) - 2 (RCB+)	Always	Below 1 Ω
B-5 (SGND) - 1 (RGND)	Always	Below 1 Ω
B-1 (SCB+) or 2 (RCB+) - Body ground	Always	10 kΩ or higher
B-5 (SGND) or 1 (RGND) - Body ground	Always	10 kΩ or higher

NG

REPLACE OUTER MIRROR RETRACTOR RH

OK

5.	REPLACE SIDE TELEVISION CAMERA ASSEMBLY RH

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

Click here

NEXT

6.	CHECK FOR DTC

(a) Clear the DTCs.

Click here

Chassis > Panoramic View Monitor > Clear DTCs

(b) Check for DTCs.

Click here

Chassis > Panoramic View Monitor > Trouble Codes

OK:

DTC C1684 is not output.

OK

END (SIDE TELEVISION CAMERA ASSEMBLY RH IS DEFECTIVE)

NG

REPLACE PARKING ASSIST ECU

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