Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Panoramic View Monitor System(for Gasoline Model) / Terminals Of Ecu

TERMINALS OF ECU

PARKING ASSIST ECU

(a) Disconnect the K35 parking assist ECU connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

K35-2 (+B) - K35-3 (GND1)

R - W-B

Power source signal

Always

11 to 14 V

K35-3 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

K35-6 (IG) - K35-3 (GND1)

BE - W-B

IG power source signal

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

K35-1 (ACC) - K35-3 (GND1)

L - W-B

ACC power source signal

Engine switch on (ACC)

11 to 14 V

Engine switch off

Below 1 V

(c) Reconnect the K35 parking assist ECU connector.

(d) Measure the voltage, resistance and waveform according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

K36-1 (CV+) - K36-9 (CGND)

B - W

Television camera assembly display signal input

Engine switch on (IG) with the camera lens of the television camera assembly not covered, displaying the panoramic image

Pulse generation (See waveform 1)

Engine switch on (IG) with the camera lens of the television camera assembly covered, blacking out the panoramic image

Pulse generation (See waveform 2)

K36-2 (CV-) - K35-3 (GND1)

R - W-B

Television camera assembly ground

Always

Below 1 Ω

K36-4 (RCV+) - K36-18 (RGND)

W - G

Side television camera assembly RH display signal input

Engine switch on (IG) with the camera lens of the side television camera assembly RH not covered, displaying the panoramic image

Pulse generation (See waveform 1)

Engine switch on (IG) with the camera lens of the side television camera assembly RH covered, blacking out the panoramic image

Pulse generation (See waveform 2)

K36-5 (RCV-) - K35-3 (GND1)

R - W-B

Side television camera assembly RH ground

Always

Below 1 Ω

K36-6 (RCB+) - K36-18 (RGND)

B - G

Power source to side television camera assembly RH

Engine switch on (ACC)

5.5 to 7.05 V

K36-7 (RSW+) - K35-3 (GND1)

BE - W-B

Terminal required by law

Panoramic image being displayed

0 to 2 V

Panoramic image not being displayed

5.5 to 7.05 V

K36-8 (SGND) - Body ground

V - Body ground

Television camera assembly ground (shield)

Always

Below 1 Ω

K36-9 (CGND) - Body ground

W - Body ground

Television camera assembly ground

Always

Below 1 Ω

K36-10 (LCV+) - K36-24 (LGND)

W - G

Side television camera assembly LH display signal input

Engine switch on (IG) with the camera lens of the side television camera assembly LH not covered, displaying the panoramic image

Pulse generation (See waveform 1)

Engine switch on (IG) with the camera lens of the side television camera assembly LH covered, blacking out the panoramic image

Pulse generation (See waveform 2)

K36-11 (LCV-) - K35-3 (GND1)

R - W-B

Side television camera assembly LH ground

Always

Below 1 Ω

K36-12 (LCB+) - K36-24 (LGND)

B - G

Power source to side television camera assembly LH

Engine switch on (ACC)

5.5 to 7.05 V

K36-13 (BCV+) - K36-27 (BGND)

B - R

Front television camera assembly display signal input

Engine switch on (IG) with the camera lens of the front television camera assembly not covered, displaying the panoramic image

Pulse generation (See waveform 1)

Engine switch on (IG) with the camera lens of the front television camera assembly covered, blacking out the panoramic image

Pulse generation (See waveform 2)

K36-14 (BCV-) - K35-3 (GND1)

W - W-B

Front television camera assembly ground

Always

Below 1 Ω

K36-15 (BCB+) - K36-27 (BGND)

G - R

Power source to front television camera assembly

Engine switch on (ACC)

5.5 to 7.05 V

K36-16 (SGND) - Body ground

BR - Body ground

Side television camera assembly RH ground (shield)

Always

Below 1 Ω

K36-18 (RGND) - Body ground

G - Body ground

Side television camera assembly RH ground

Always

Below 1 Ω

K36-23 (SGND) - Body ground

BR - Body ground

Side television camera assembly LH ground (shield)

Always

Below 1 Ω

K36-24 (LGND) - Body ground

G - Body ground

Side television camera assembly LH ground

Always

Below 1 Ω

K36-25 (SGND) - Body ground

BR - Body ground

Front television camera assembly ground (shield)

Always

Below 1 Ω

K36-27 (BGND) - Body ground

R - Body ground

Front television camera assembly ground

Always

Below 1 Ω

K35-15 (REV) - K35-3 (GND1)

GR - W-B

Reverse signal

Engine switch on (IG), shift lever in P

Below 1 V

Engine switch on (IG), shift lever in other than P

11 to 14 V

K35-20 (BLSW) - K35-3 (GND1)

G - W-B

Panoramic view monitor switch switch signal

Engine switch on (IG), panoramic view monitor switch not pushed

5.5 to 6.5 V

Engine switch on (IG), panoramic view monitor switch pushed

Below 1 V

K35-28 (NS+) - K35-27 (NSG)

B - BR

Video signal

Engine switch on (IG) and panoramic image being displayed

Pulse generation (See waveform 3)

K35-26 (NS-) - K35-3 (GND1)

W - W-B

Ground

Always

Below 1 Ω

K35-27 (NSG) - Body ground

BR - Body ground

Shield ground

Always

Below 1 Ω

*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

(e) Reference (Oscilloscope waveform):

HINT:

A waterproof connector is used for the television camera assembly, front television camera assembly, side television camera assembly LH or side television camera assembly RH. 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
  • K36-1 (CV+) - K36-9 (CGND)
  • K36-10 (LCV+) - K36-24 (LGND)
  • K36-13 (BCV+) - K36-27 (BGND)
  • K36-4 (RCV+) - K36-18 (RGND)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Panoramic view monitor system operating

HINT:

  • The video waveform changes according to the image sent by the television camera assembly, front television camera assembly, side television camera assembly LH or side television camera assembly RH.
  • The video waveform is constantly output when the engine switch is on (ACC).

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

Item

Content

Measurement terminal
  • K36-1 (CV+) - K36-9 (CGND)
  • K36-10 (LCV+) - K36-24 (LGND)
  • K36-13 (BCV+) - K36-27 (BGND)
  • K36-4 (RCV+) - K36-18 (RGND)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Panoramic view monitor system operating

HINT:

  • The video waveform changes according to the image sent by the television camera assembly, front television camera assembly, side television camera assembly LH or side television camera assembly RH.
  • The video waveform is constantly output when the engine switch is on (ACC).

(3) Waveform 3

Item

Content

Measurement terminal

K35-28 (NS+) - K35-27 (NSG)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Panoramic image being displayed

*a

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

*b

Synchronization Signal

*c

Video Waveform

HINT:

The video waveform changes according to the image sent by the parking assist ECU.

TELEVISION CAMERA ASSEMBLY

(a) Disconnect the P7 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)

Wiring Color

Terminal Description

Condition

Specified Condition

P7-6 (CB+) - Body ground

L - Body ground

Power source

Engine switch on (ACC)

11 to 14 V

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

(c) Reconnect the P7 television camera assembly connector.

(d) Measure the voltage and waveform according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

P7-3 (CV+) - P7-2 (CV-)

B - R

Video signal

Engine switch on (IG) with the camera lens of the side television camera assembly RH not covered, displaying the panoramic image

Pulse generation

(Refer to waveform 1)

Engine switch on (IG) with the camera lens of the television camera assembly covered, blacking out the panoramic image

Pulse generation

(Refer to waveform 2)

P7-5 (CGND) - Body ground

W - Body ground

Shield ground

Always

Below 1 V

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.

If the result is not as specified, the 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 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

P7-3 (CV+) - P7-2 (CV-)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Panoramic view monitor system operating

HINT:

  • The video waveform changes according to the image sent by the television camera assembly.
  • The video waveform is constantly output when the engine switch is on (ACC).

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

Item

Content

Measurement terminal

P7-3 (CV+) - P7-2 (CV-)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Panoramic view monitor system operating

HINT:

  • The video waveform changes according to the image sent by the television camera assembly.
  • The video waveform is constantly output when the engine switch is on (ACC).

RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Measure the resistance and waveform according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G2-28 (V+) - G3-1 (GND1)

V - BR

Video signal

Panoramic image being displayed

Pulse generation

(Refer to waveform 1)

G2-29 (V-) - G3-1 (GND1)

SB - BR

Ground

Always

Below 1 Ω

(b) Reference (Oscilloscope waveform):

(1) Waveform 1

Item

Content

Measurement terminal

G2-28 (V+) - G3-1 (GND1)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Panoramic image being displayed

*a

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

*b

Synchronization Signal

*c

Video Waveform

HINT:

The video waveform changes according to the image sent by the parking assist ECU.

    System Diagram

    Lost Communication with Panoramic View Monitor Control Module (U023B)

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