Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Image from Camera for Rear View Monitor is Abnormal

DESCRIPTION

The display signal from the rear television camera assembly is transmitted to the radio and display receiver assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the radio and display receiver assembly, always replace it with a new one.

    If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:

    • A communication malfunction DTC may be stored.
    • The radio and display receiver assembly may not operate normally.

      Click here

PROCEDURE

1.

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

(a) Disconnect the I253 radio and display receiver assembly connector.

(b) Disconnect the U19 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

I253-30 (CA+) - U19-6 (CB+)

Always

Below 1 Ω

I253-28 (V+) - U19-3 (CV+)

Always

Below 1 Ω

I253-27 (CGND) - U19-5 (CGND)

Always

Below 1 Ω

I253-29 (V-) - U19-2 (CV-)

Always

Below 1 Ω

I253-30 (CA+) or U19-6 (CB+) - Body ground

Always

10 kΩ or higher

I253-28 (V+) or U19-3 (CV+) - Body ground

Always

10 kΩ or higher

I253-27 (CGND) or U19-5 (CGND) - Body ground

Always

10 kΩ or higher

I253-29 (V-) or U19-2 (CV-) - Body ground

Always

10 kΩ or higher

I253-26 (CSLD) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Remove the radio and display receiver assembly with its connectors still connected.

*a

Component with harness connected

(Radio and Display Receiver Assembly)

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I253-29 (V-) - Body ground

Always

Below 1 Ω

I253-27 (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

I253-30 (CA+) - Body ground

Ignition switch ACC

5.5 to 7.05 V

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

3.

CHECK REAR TELEVISION CAMERA ASSEMBLY

(a) Remove the radio and display receiver assembly with its connectors still connected.

*a

Component with harness connected

(Radio and Display Receiver 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 television camera assembly. Therefore, inspect the waveform at the radio and display receiver assembly with the connector connected.
  • The video waveform changes according to the image sent by the rear television camera assembly.

Item

Content

Terminal No. (Symbol)

I253-28 (V+) - I253-27 (CGND)

Tool Setting

200 mV/DIV., 50 μsec./DIV.

Condition

Waveform 1: Ignition switch ON, shift lever in R, camera lens not covered, displaying an image

Waveform 2: Ignition switch ON, shift lever in R, camera lens covered, blacking out screen

OK:

Waveform is as shown in the illustration.

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

4.

CHECK REAR TELEVISION CAMERA ASSEMBLY

(a) Replace the rear television camera assembly with a new or known good one.

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(b) Check if the same malfunction recurs when the rear view monitor screen is displayed.

OK:

Malfunction does not reoccur (returns to normal).

OK

END (REAR TELEVISION CAMERA ASSEMBLY WAS DEFECTIVE)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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