Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Front Camera Current Malfunction (C1682)

DESCRIPTION

DTC C1682 is stored if the parking assist ECU judges as a result of its self check that there is a problem with the current supplied from the front television camera assembly connected to the parking assist ECU.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1682

Front Camera Current Malfunction

Open or short in the front television camera signal circuit

  • Harness or connector
  • Front television camera assembly
  • Parking assist ECU

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 panoramic view monitor system may be needed.

    Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the J158 parking assist ECU connector.

(b) Disconnect the p1 front television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J158-15 (BCB+) - p1-6 (BCB+)

Always

Below 1 Ω

J158-37 (BGND) - p1-5 (BGND)

Always

Below 1 Ω

J158-15 (BCB+) or p1-6 (BCB+) - Body ground

Always

10 kΩ or higher

J158-37 (BGND) or p1-5 (BGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK PARKING ASSIST ECU (BCB+, BGND)

(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

J158-37 (BGND) - 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

J158-15 (BCB+) - J158-37 (BGND)

Engine switch on (IG)

5.5 to 7.05 V

OK

REPLACE FRONT TELEVISION CAMERA ASSEMBLY

NG

REPLACE PARKING ASSIST ECU

    Front Camera Feedback Malfunction (C1681)
    DESCRIPTION DTC C1681 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 front television camera ass ...

    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 ca ...

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