Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

REAR TELEVISION CAMERA ASSEMBLY

(a) Disconnect the S11 rear television camera assembly connector.

(b) Measure the voltage of each terminal of the wire harness side connector.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S11-6 (CB+) - Body ground

G - Body ground

Power source

Ignition switch ACC

5.5 to 7.05 V

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the S11 rear television camera assembly connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S11-3 (CV+) - S11-2 (CV-)

W - R

Video signal

Ignition switch ON

Shift lever in R

Camera lens not covered, displaying an image

Pulse generation

(Refer to waveform 1)

Ignition switch ON

Shift lever in R

Camera lens covered, blacking out the screen

Pulse generation

(Refer to waveform 2)

S11-5 (CGND) - Body ground

B - Body ground

Camera ground

Always

Below 1 Ω

HINT:

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

If the result is not as specified, the rear television camera assembly may be malfunctioning.

(e) Reference (Oscilloscope waveform):

*a

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

*b

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

*c

Synchronization Signal

*d

Video Waveform

HINT:

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

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

Item

Content

Measurement terminal

S11-3 (CV+) - S11-2 (CV-)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Ignition switch ON, shift lever in R

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 turned to ACC.

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

Item

Content

Measurement terminal

S11-3 (CV+) - S11-2 (CV-)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Ignition switch ON, shift lever in R

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 turned to ACC.

RADIO AND DISPLAY RECEIVER ASSEMBLY

HINT:

Check from the rear of the connector while it is connected to the components.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F131-26 (CSLD) - Body ground

Shield - Body ground

Shield ground

Always

Below 1 V

F131-27 (CGND) - Body ground

B - Body ground

Camera ground

Always

Below 1 V

F131-28 (V+) - F129-1 (GND1)

R - LA*1

W - LA*2

Video signal

Ignition switch ON

Shift lever in R

Camera lens not covered, displaying an image

Pulse generation

(Refer to waveform 1)

Ignition switch ON

Shift lever in R

Camera lens covered, blacking out screen

Pulse generation

(Refer to waveform 2)

F131-29 (V-) - F129-1 (GND1)

W - LA*1

R - LA*2

Ground

Always

Below 1 V

F131-30 (CA+) - F129-1 (GND1)

G - LA

Rear television camera assembly power supply

Ignition switch ACC

5.5 to 7.05 V

  • *1: for TMC Made
  • *2: for TMMT Made

(a) Reference (Oscilloscope waveform):

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

Item

Content

Measurement terminal

F131-28 (V+) - F129-1 (GND1)

Measurement setting

200 mV/DIV., 50 μs/DIV.

Condition

Ignition switch ON, shift lever in R

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 turned to ACC.

*a

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

*b

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

*c

Synchronization Signal

*d

Video Waveform

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

Item

Content

Measurement terminal

F131-28 (V+) - F129-1 (GND1)

Measurement setting

200 mV/DIV., 50 μs/DIV.

Condition

Ignition switch ON, shift lever in R

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 turned to ACC.
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