Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Terminals Of Ecu

TERMINALS OF ECU

REAR TELEVISION CAMERA ASSEMBLY

(a) Disconnect the rear television camera assembly connector.

(b) Measure the voltage on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

U48-4 (CB+) - Body ground

Power source

Ignition switch ON

6 to 9 V

(c) Reconnect the rear television camera assembly connector.

(d) Measure the resistance and check for pulses at each terminal of the connector.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

U48-1 (CANH) - Body ground

CAN communication line

-

-

U48-2 (CANL) - Body ground

CAN communication line

-

-

U48-3 (CGND) - Body ground

Camera ground

Always

Below 1 Ω

U48-6 (CV+) - U48-5 (CV-)

Video signal

Ignition switch ON

Shift position in R

Camera lens not covered, displaying image

Pulse generation

(Refer to waveform 1)

Ignition switch ON

Shift position in R

Camera lens covered, blacking out screen

Pulse generation

(Refer to waveform 2)

U48-7 (SGND) - Body ground

Camera ground (shield)

Always

Below 1 Ω

(e) Reference (Oscilloscope waveform):

*a

Waveform 1 (camera lens not covered, displaying image)

*b

Waveform 2 (camera lens covered, blacking out screen)

*c

Synchronization Signal

*d

Video Waveform

(1) Waveform 1 (camera lens is not covered, displaying an image)

Item

Content

Measurement terminal

U48-6 (CV+) - U48-5 (CV-)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Ignition switch ON, shift position in R, camera lens not covered, displaying image

HINT:

  • The video waveform changes according to the image sent by the rear television camera assembly.
  • The video waveform is constantly output when the ignition switch is ACC.

(2) Waveform 2 (camera lens is covered, blacking out the screen)

Item

Content

Measurement terminal

U48-6 (CV+) - U48-5 (CV-)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Ignition switch ON, shift position in R, camera lens covered, blacking out screen

HINT:

  • The video waveform changes according to the image sent by the rear television camera assembly.
  • The video waveform is constantly output when the ignition switch is ACC.

RADIO AND DISPLAY RECEIVER ASSEMBLY

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