Lexus NX: Image from Camera for Parking Assist Monitor is Abnormal

Lexus NX Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Parking Assist Monitor System / Image from Camera for Parking Assist Monitor is Abnormal

DESCRIPTION

The video signal from the rear television camera assembly is transmitted to the multi-display assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When the "!" mark is displayed on the multi-display assembly after disconnecting the cable from the negative (-) auxiliary 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 the parking assist monitor system may be needed.

    Click here

HINT:

Images may be unclear even in normal conditions if:
  • Electrical devices are used in the cabin (noise may occur in the image).
  • Accessories that generate radio waves have been installed (noise may occur in the image).
  • The camera lens is frosted over (the image immediately after turning the power switch on (IG) may be blurred or darker than normal).
  • The camera lens is dirty with snow, mud, etc.
  • A strong beam of light, such as a sunbeam or headlight, hits the camera.
  • It is too dark around the camera (at night, etc.).
  • The ambient temperature around the camera is either too high or too low.
  • The vehicle is tilted at a steep angle.
  • The rear television camera assembly lens is scratched.
  • The rear television camera assembly lens has drops of water on it or the humidity is high.
  • When the camera is used under fluorescent lights, sodium lights, mercury lights, etc., the lights and the illuminated area may appear to flicker.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the I42 multi-display assembly connector.

(b) Disconnect the Y25 rear television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I42-10 (CA+) - Y25-6 (CB+)

Always

Below 1 Ω

I42-8 (V+) - Y25-3 (CV+)

Always

Below 1 Ω

I42-9 (V-) - Y25-2 (CV-)

Always

Below 1 Ω

I42-21 (CGND) - Y25-5 (CGND)

Always

Below 1 Ω

I42-10 (CA+) or Y25-6 (CB+) - Body ground

Always

10 kΩ or higher

I42-8 (V+) or Y25-3 (CV+) - Body ground

Always

10 kΩ or higher

I42-9 (V-) or Y25-2 (CV-) - Body ground

Always

10 kΩ or higher

I42-21 (CGND) or Y25-5 (CGND) - Body ground

Always

10 kΩ or higher

I42-20 (CSLD) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK MULTI-DISPLAY ASSEMBLY (CGND, CA+)

(a) Disconnect the rear television camera assembly.

*a

Component with harness connected

(Multi-display Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I42-21 (CGND) - 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

I42-10 (CA+) - I42-21 (CGND)

Power switch on (ACC)

5.5 to 7.05 V

I42-10 (CA+) - I42-21 (CGND)

Power switch off

Below 1 V

NG

REPLACE MULTI-DISPLAY ASSEMBLY

OK

3.

CHECK REAR TELEVISION CAMERA ASSEMBLY

(a) Remove the multi-display assembly with the connector still connected.

*a

Component with harness connected

(Multi-display Assembly)

*b

Waveform 1

*c

Waveform 2

*d

Synchronization Signal

*e

Video Waveform

-

-

(b) Check the waveform of the rear television camera assembly using an oscilloscope.

HINT:

A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the multi-display assembly with the connector connected.

Item

Content

Terminal No. (Symbol)

I42-8 (V+) - I42-21 (CGND)

Tool Setting

200 mV/DIV., 50 μsec./DIV.

Condition

Waveform 1: Power switch on (IG), shift lever in R, camera lens is not covered, displaying an image

Waveform 2: Power switch on (IG), shift lever in R, camera lens is covered, blacking out the screen

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

Result

Proceed to

Waveform is as shown in the illustration

A

Waveform is not as shown in the illustration

B

B

REPLACE REAR TELEVISION CAMERA ASSEMBLY

A

4.

CHECK MULTI-DISPLAY ASSEMBLY

(a) Replace the multi-display assembly with a new or normally functioning one.

Click here

(b) Check if the same malfunction recurs when the parking assist monitor screen is displayed.

OK:

Malfunction does not reoccur (returns to normal).

OK

END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE)

NG

REPLACE REAR TELEVISION CAMERA ASSEMBLY

READ NEXT:

 Rear Cross Traffic Alert Buzzer

 Components

COMPONENTS ILLUSTRATION *1 BLIND SPOT MONITOR BUZZER *2 DECK TRIM SIDE PANEL ASSEMBLY RH *3 LUGGAGE HOLD BELT STRIKER ASSEMBLY *4 NO. 1 LUGGAGE COMPARTMENT TRIM HOOK *5 REAR

 Removal

REMOVAL PROCEDURE 1. REMOVE REAR SEAT ASSEMBLY (a) for Manual Seat: Click here (b) for Power Seat: Click here 2. REMOVE REAR FLOOR FINISH PLATE Click here 3. DISCONNECT REAR DOOR OPENING TRIM W

SEE MORE:

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART CAN Communication System DTC No. Detection Item DTC Output from Link B1003 ECU Malfunction Central gateway ECU (network gateway ECU) U0199 Lost Communication with "Door Control Module A" Main Body U0200 Lost Communication with "D

 Installation

INSTALLATION PROCEDURE 1. INSTALL FRONT LUMBAR POWER SEAT SWITCH (a) Attach the 4 claws to install the front lumbar power seat switch. 2. INSTALL FRONT POWER SEAT SWITCH LH Click here 3. INSTALL FRONT SEAT CUSHION SHIELD LH Click here 4. INSTALL POWER SEAT SWITCH KNOB LH Click here 5. INSTALL

© 2016-2024 Copyright www.lexunx.com