Lexus ES manuals

Lexus ES: Terminals Of Ecu

TERMINALS OF ECU

PARKING ASSIST ECU

(a) Disconnect the N44 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

N44-1 (+B) - N44-4 (GND1)

R - W-B

Power source signal

Always

11 to 14 V

N44-4 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

N44-3 (IG) - N44-4 (GND1)

BE - W-B

IG power source signal

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

N44-2 (ACC) - N44-4 (GND1)

L - W-B

ACC power source signal

Power switch on (ACC)

11 to 14 V

Power switch off

Below 1 V

(c) Reconnect the N44 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

N43-29 (CV+) - N43-32 (CGND)

B - R

Rear television camera assembly display signal input

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

Pulse generation (See waveform 1)

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

Pulse generation (See waveform 2)

N43-30 (CV-) - N44-4 (GND1)

W - W-B

Rear television camera assembly ground

Always

Below 1 Ω

N43-38 (RCV+) - N43-17 (RGND)

W - G

Side television camera assembly RH display signal input

Power 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)

Power 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)

N43-16 (RCV-) - N44-4 (GND1)

R - W-B

Side television camera assembly RH ground

Always

Below 1 Ω

N43-40 (RCB+) - N43-17 (RGND)

B - G

Power source to side television camera assembly RH

Power switch on (IG)

5.5 to 7.05 V

N43-6 (RSW+) - N44-4 (GND1)

B - 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

N43-32 (CGND) - Body ground

R - Body ground

Rear television camera assembly ground (shield)

Always

Below 1 Ω

N43-10 (LCV+) - N43-35 (LGND)

W - G

Side television camera assembly LH display signal input

Power 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)

Power 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)

N43-34 (LCV-) - N44-4 (GND1)

R - W-B

Side television camera assembly LH ground

Always

Below 1 Ω

N43-12 (LCB+) - N43-35 (LGND)

B - G

Power source to side television camera assembly LH

Power switch on (IG)

5.5 to 7.05 V

N43-36 (BCV+) - N43-37 (BGND)

B - R

Front television camera assembly display signal input

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

Pulse generation (See waveform 1)

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

Pulse generation (See waveform 2)

N43-13 (BCV-) - N44-4 (GND1)

W - W-B

Front television camera assembly ground

Always

Below 1 Ω

N43-15 (BCB+) - N43-37 (BGND)

G - R

Power source to front television camera assembly

Power switch on (IG)

5.5 to 7.05 V

N43-17 (RGND) - N44-4 (GND1)

G - W-B

Side television camera assembly RH ground

Always

Below 1 Ω

N43-35 (LGND) - N44-4 (GND1)

G - W-B

Side television camera assembly LH ground

Always

Below 1 Ω

N43-37 (BGND) - N44-4 (GND1)

R - W-B

Front television camera assembly ground

Always

Below 1 Ω

N44-15 (BLSW) - Body ground

G - Body ground

Panoramic view monitor switch switch signal

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

5.5 to 6.5 V

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

Below 1 V

N108-1 (GVO+)

-

Video signal (Digital)

-

-

N108-2 (GVO-)

-

Video signal (Digital)

-

-

N108-3 (GVG1)

Shielded

Shield ground

-

-

*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 rear 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 receiver assembly with the connector connected.

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

Item

Content

Measurement terminal

  • N43-29 (CV+) - N43-32 (CGND)
  • N43-10 (LCV+) - N43-35 (LGND)
  • N43-36 (BCV+) - N43-37 (BGND)
  • N43-38 (RCV+) - N43-17 (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 rear 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 power switch is on (ACC).

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

Item

Content

Measurement terminal

  • N43-29 (CV+) - N43-32 (CGND)
  • N43-10 (LCV+) - N43-35 (LGND)
  • N43-36 (BCV+) - N43-37 (BGND)
  • N43-38 (RCV+) - N43-17 (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 rear 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 power switch is on (ACC).

REAR TELEVISION CAMERA ASSEMBLY

(a) Disconnect the T2 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)

Wiring Color

Terminal Description

Condition

Specified Condition

T2-6 (CB+) - Body ground

GR - Body ground

Power source

Power 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 T2 rear 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

T2-3 (CV+) - T2-2 (CV-)

B - G

Video signal

Power 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)

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

Pulse generation

(Refer to waveform 2)

T2-5 (CGND) - Body ground

BR - Body ground

Shield ground

Always

Below 1 V

HINT:

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

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

Item

Content

Measurement terminal

T2-3 (CV+) - T2-2 (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 rear television camera assembly.
  • The video waveform is constantly output when the power switch is on (ACC).

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

Item

Content

Measurement terminal

T2-3 (CV+) - T2-2 (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 rear television camera assembly.
  • The video waveform is constantly output when the power switch is on (ACC).

RADIO RECEIVER ASSEMBLY (w/ Audio and Visual System )

Click here

RADIO RECEIVER ASSEMBLY (w/ Navigation System)

Click here

READ NEXT:

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DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the rear television camera assembly. HINT: If CAN communication system DTCs are stored, they ma

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DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the parking assist ECU. HINT: If CAN communication system DTCs are stored, they may also be sto

 Lost Communication with Image Processing Sensor B (U0266-U0268)

DESCRIPTION These DTCs are stored when communication between the parking assist ECU and front television camera assembly, side television camera assembly LH, side television camera RH is not possible.

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