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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