Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

PARKING ASSIST ECU

(a) Disconnect the J159 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

J159-1 (+B) - J159-4 (GND1)

LA-L - LA

Power source signal

Always

11 to 14 V

J159-2 (ACC) - J159-4 (GND1)

V - LA

ACC power source signal

Engine switch on (ACC)

11 to 14 V

Engine switch off

Below 1 V

J159-3 (IG) - J159-4 (GND1)

P - LA

IG power source signal

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

J159-4 (GND1) - Body ground

LA - Body ground

Ground

Always

Below 1 Ω

(c) Connect the J159 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

J158-6 (RSW+) - J159-4 (GND1)

B - LA

Terminal required by law

Panoramic image being displayed

0 to 2 V

Panoramic image not being displayed

5.5 to 7.05 V

J158-10 (LCV+) - J158-35 (LGND)

BR - SB

Side television camera assembly LH display signal input

Engine switch on (IG), panoramic view monitor switch on, camera lens not covered, displaying image

Pulse generation (See waveform 1)

Engine switch on (IG), panoramic view monitor switch on, camera lens covered, blacking out screen

Pulse generation (See waveform 2)

J158-11 (SGND) - J158-35 (LGND)

B - SB

Side television camera assembly LH ground (shield)

Always

Below 1 Ω

J158-12 (LCB+) - J158-35 (LGND)

P - SB

Power source to side television camera assembly LH

Engine switch on (IG)

5.5 to 7.05 V

J158-13 (BCV-) - J159-4 (GND1)

R - LA

Front television camera assembly ground

Always

Below 1 Ω

J158-14 (SGND) - J158-37 (BGND)

V - W

Front television camera assembly ground (shield)

Always

Below 1 Ω

J158-15 (BCB+) - J158-37 (BGND)

G - W

Power source to front television camera assembly

Engine switch on (IG)

5.5 to 7.05 V

J158-16 (RCV-) - J159-4 (GND1)

R - LA

Side television camera assembly RH ground

Always

Below 1 Ω

J158-17 (RGND) - Body ground

G - Body ground

Side television camera assembly RH ground

Always

Below 1 Ω

J158-29 (CV+) - J158-32 (CGND)

B - G

Rear television camera assembly display signal input

Engine switch on (IG), panoramic view monitor switch on, camera lens not covered, displaying image

Pulse generation (See waveform 1)

Engine switch on (IG), panoramic view monitor switch on, camera lens covered, blacking out screen

Pulse generation (See waveform 2)

J158-30 (CV-) - J159-4 (GND1)

R - LA

Rear television camera assembly ground

Always

Below 1 V

J158-31 (SGND) - J158-32 (CGND)

V - G

Rear television camera assembly ground (shield)

Always

Below 1 Ω

J158-32 (CGND) - Body ground

G - Body ground

Rear television camera assembly ground

Always

Below 1 Ω

J158-33 (CB+) - J158-32 (CGND)

B - G

Power source to rear television camera assembly

Engine switch on (IG)

5.5 to 7.05 V

J158-34 (LCV-) - J159-4 (GND1)

LG - LA

Side television camera assembly LH ground

Always

Below 1 Ω

J158-35 (LGND) - Body ground

SB - Body ground

Side television camera assembly LH ground

Always

Below 1 Ω

J158-36 (BCV+) - J158-37 (BGND)

B - W

Front television camera assembly display signal input

Engine switch on (IG), panoramic view monitor switch on, camera lens not covered, displaying image

Pulse generation (See waveform 1)

Engine switch on (IG), panoramic view monitor switch on, camera lens covered, blacking out screen

Pulse generation (See waveform 2)

J158-37 (BGND) - Body ground

W - Body ground

Front television camera assembly ground

Always

Below 1 Ω

J158-38 (RCV+) - J158-17 (RGND)

W - G

Side television camera assembly RH display signal input

Engine switch on (IG), panoramic view monitor switch on, camera lens not covered, displaying image

Pulse generation (See waveform 1)

Engine switch on (IG), panoramic view monitor switch on, camera lens covered, blacking out screen

Pulse generation (See waveform 2)

J158-39 (SGND) - J158-17 (RGND)

Shielded - G

Side television camera assembly RH ground (shield)

Always

Below 1 Ω

J158-40 (RCB+) - J158-17 (RGND)

B - G

Power source to side television camera assembly RH

Engine switch on (IG)

5.5 to 7.05 V

J159-9 (CA2H)

R

CAN communication line

-

-

J159-10 (CA2L)

W

CAN communication line

-

-

J159-11 (CANH)

LG

CAN communication line

-

-

J159-12 (CANL)

W

CAN communication line

-

-

J159-14 (REV) - J159-4 (GND1)

LG - LA

Reverse signal

Engine switch on (IG), shift lever in R

11 to 14 V

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

Below 1 V

J159-15 (BLSW) - J159-4 (GND1)

V - LA

Panoramic view monitor switch signal

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

5.5 to 6.5 V

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

Below 1 V

J172-1 (GVO+)

-

Video signal (Digital)

-

-

J172-2 (GVO-)

-

Video signal (Digital)

-

-

J172-3 (GVG1)

Shielded

Shield ground

-

-

(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 and side television camera assembly RH. Therefore, inspect the waveform at the parking assist ECU with the connector connected.

*a

Waveform 1

*b

Waveform 2

*c

Synchronization Signal

*d

Video Waveform

Measurement Condition

Item

Content

Measurement terminal

  • J158-36 (BCV+) - J158-37 (BGND)
  • J158-29 (CV+) - J158-32 (CGND)
  • J158-10 (LCV+) - J158-35 (LGND)
  • J158-38 (RCV+) - J158-17 (RGND)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

  • Waveform 1: Engine switch on (IG), panoramic view monitor switch on, camera lens not covered, displaying image
  • Waveform 2: Engine switch on (IG), panoramic view monitor switch on, camera lens covered, blacking out screen

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 engine switch is on (ACC).

RADIO RECEIVER ASSEMBLY

w/ Audio and Visual System (for 12.3 Inch Display): Click here

w/ Audio and Visual System (for 8 Inch Display): Click here

w/ Navigation System: Click here

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

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