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

TERMINALS OF ECU

HINT:

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

RADIO RECEIVER ASSEMBLY

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

*: It is connected, but not used

J151-1 (VMTF) - J148-1 (GND1)

Y - W-B

Visual mute signal

Engine switch on (ACC) Screen display changing

3.5 V or higher → Below 1 V → 3.5 V or higher

J151-5 (CNH1)

V

Local bus communication signal

-

-

J151-6 (CNL1)

W

Local bus communication signal

-

-

J151-13 (CANH)

BE

CAN communication signal

-

-

J151-14 (CANL)

W

CAN communication signal

-

-

J151-15 (ILL+) - J148-1 (GND1)

V - W-B

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

11 to 14 V

J151-16 (ILL-) - J148-1 (GND1)

W - W-B

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

Pulse generation

J151-19 (IG) - J148-1 (GND1)

L - W-B

Power source (IG)

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

J151-21 (MIN+) - J148-1 (GND1)

R - W-B

Microphone voice signal

See "Microphone Check" in Operation Check

-

J151-22 (MIN-) - Body ground

G - Body ground

Microphone voice signal

See "Microphone Check" in Operation Check

-

J151-24 (SGND) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

J151-25 (SNS2) - J148-1 (GND1)

SB - W-B

Microphone connection detection signal

Always

Below 1 V

J148-1 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

J148-2 (GND2) - Body ground

R - Body ground

Ground

Always

Below 1 Ω

J148-3 (+B) - J148-1 (GND1)

B - W-B

Power source (+B)

Always

11 to 14 V

J148-4 (+B1) - J148-1 (GND1)

LA-BE - W-B

Power source (+B)

Always

11 to 14 V

J148-5 (TX1+)

GR

AVC-LAN communication signal

-

-

J148-6 (TX1-)

V

AVC-LAN communication signal

-

-

J148-10 (AGND) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

J148-11 (VAL+) - J148-13 (VA-)

G - P

Sound signal (Left)

External device system playing (when No. 1 stereo jack adapter assembly used)

A waveform synchronized with sound signals is output

J148-12 (VAR+) - J148-13 (VA-)

L - P

Sound signal (Right)

External device system playing (when No. 1 stereo jack adapter assembly used)

A waveform synchronized with sound signals is output

J148-13 (VA-) - J148-1 (GND1)

P - W-B

Sound signal ground

Always

Below 1 V

J148-14 (ADPG) - J148-1 (GND1)

BE - W-B

External device connection detection signal

External device connected

Below 1 V

External device not connected

1.1 to 1.9 V

J148-15 (ACC1) - J148-1 (GND1)

SB - W-B

Power source (ACC)

Engine switch off

Below 1 V

Engine switch on (ACC)

11 to 14 V

J148-16 (ACC) - J148-1 (GND1)

L - W-B

Power source (ACC)

Engine switch off

Below 1 V

Engine switch on (ACC)

11 to 14 V

J148-21 (SW1) - J148-24 (SWG)

V - L

Steering pad switch signal

No switch pushed

2.97 to 3.56 V

Seek+ switch pushed

0.27 to 0.35 V

Seek- switch pushed

0.86 to 1.03 V

Volume+ switch pushed

1.51 to 1.79 V

Volume- switch pushed

2.22 to 2.66 V

J148-22 (SW2) - J148-24 (SWG)

G - L

Steering pad switch signal

No switch pushed

2.97 to 3.56 V

MODE switch pushed

0.27 to 0.35 V

On hook switch pushed

0.86 to 1.03 V

Off hook switch pushed

1.51 to 1.79 V

Voice switch pushed

2.22 to 2.66 V

J148-24 (SWG) - Body ground

L - Body ground

Steering pad switch signal

Always

Below 1 Ω

J148-27 (SPD) - J148-1 (GND1)

BR - W-B

Vehicle speed signal

See "Vehicle Signal Check Mode" in Operation Check

-

J149-7 (SUP) - J148-1 (GND1)

R - W-B

Start up signal

20 seconds elapse after turning the engine switch on (ACC)

11 to 14 V

J149-10 (USBV) - J148-1 (GND1)

L - W-B

DCM (telematics transceiver) power supply

Engine switch off

Below 1 V

Engine switch on (ACC)

4.75 to 5.25 V

J149-11 (USBG) - Body ground

G - Body ground

Ground

Always

Below 1 Ω

J149-12 (SGND) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

J149-19 (RST)*

W

-

-

-

J149-22 (SI+) - J148-1 (GND1)

Y - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with sound is output

J149-23 (SI-) - J148-1 (GND1)

BR - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with sound is output

J149-24 (SGND) - J148-1 (GND1)

Shielded - W-B

Shield ground

Always

Below 1 Ω

J149-25 (MCO+) - J149-26 (MCO-)

R - G

Microphone voice signal

See "Check Microphone (DCU)" in Operation Check

-

J149-26 (MCO-) - J148-1 (GND1)

R - W-B

Microphone voice signal

See "Check Microphone (DCU)" in Operation Check

-

J149-28 (REV2) - J148-1 (GND1)

GR - W-B

Reverse signal

Engine running, shift position not in R → in R

2 V or less → 11 to 14 V

J166-1 (GVI-)

-

Video signal (Digital)

-

-

J166-2 (GVI+)

-

Video signal (Digital)

-

-

J166-3 (GVG1) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

z31-1 (GV2-)

-

Video signal (Digital)

-

-

z31-2 (GV2+)

-

Video signal (Digital)

-

-

z31-3 (GVG2) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

z31-4 (US4+)

-

USB communication line

-

-

z31-5 (US4-)

-

USB communication line

-

-

z31-6 (UGD4) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

J122-1 (WUO)

W

MOST communication wake-up signal

-

-

J122-2 (MI+)

B

MOST communication signal

-

-

J122-3 (MI-)

B

MOST communication signal

-

-

J122-4 (SLDI)

Shielded

Shield ground

-

-

J122-5 (MO+)

B

MOST communication signal

-

-

J122-6 (MO-)

B

MOST communication signal

-

-

J122-7 (SLDO)

Shielded

Shield ground

-

-

J169-1 (USV1)

-

Power source

-

-

J169-2 (US1-)

-

Data signal

-

-

J169-3 (US1+)

-

Data signal

-

-

J169-4 (UGD1)

-

Ground

-

-

J169-5 (USG1) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

RA-5 (ANT+) - J148-1 (GND1)

- - W-B

Power source of antenna

Engine switch on (ACC)

Radio switch on and AM or FM selected

11 to 14 V

NAVIGATION ECU

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

*: It is connected, but not used

J153-6 (VOI+) - J153-23 (GND)

Y - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with sound is output

J153-7 (VOI-) - J153-23 (GND)

BR - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with sound is output

J153-8 (SLD1) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

J153-9 (SPD) - J153-23 (GND)

W - W-B

Vehicle speed signal

See "Check GPS and Vehicle Sensors" in Operation Check

-

J153-10 (+B) - J153-23 (GND)

SB - W-B

Power source (+B)

Always

11 to 14 V

J153-13 (MIC+) - J153-23 (GND)

R - W-B

Microphone voice signal

See "Microphone Check (MEU)" in Operation Check

-

J153-14 (MIC-) - Body ground

G - Body ground

Microphone voice signal

See "Microphone Check (MEU)" in Operation Check

-

J153-19 (REV2) - J153-23(GND)

GR - W-B

Reverse signal

Engine running, shift position not in R → in R

2 V or less → 11 to 14 V

J153-21 (SUP) - J153-23 (GND)

R - W-B

Power source (ACC)

20 seconds elapse after turning the engine switch on (ACC)

11 to 14 V

J153-22 (RST)*

W

-

-

-

J153-23 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

J164-1 (USB+)

-

USB communication line

-

-

J164-2 (USB-)

-

USB communication line

-

-

J164-3 (USBS) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

z32-1 (GVO-)

-

Video signal (Digital)

-

-

z32-2 (GVO+)

-

Video signal (Digital)

-

-

z32-3 (GVG1) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

z32-4 (US4+)

-

USB communication line

-

-

z32-5 (US4-)

-

USB communication line

-

-

z32-6 (UGD4) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

STEREO COMPONENT AMPLIFIER ASSEMBLY

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J66-1 (+B) - J66-3 (GND)

P - W-B

Power source (+B)

Always

11 to 14 V

J66-2 (TMUT) - Body ground

BE - Body ground

Mute signal

Audio system playing

3.0 to 5.0 V

Emergency call mode

Below 1 V

J66-3 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

J66-4 (WFL+) - J66-3 (GND)

L - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-5 (WFR+) - J66-3 (GND)

G - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

J66-6 (WF1+) - J66-3 (GND)*2

GR - W-B

Sound signal (Woofer)

Audio system playing

A waveform synchronized with sound signals is output

J66-7 (CTR+) - J66-3 (GND)

L - W-B

Sound signal (Front Center)

Audio system playing

A waveform synchronized with sound signals is output

J66-8 (RL+) - J66-3 (GND)

B - W-B

Sound signal (Rear Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-9 (RR+) - J66-3 (GND)

R - W-B

Sound signal (Rear Right)

Audio system playing

A waveform synchronized with sound signals is output

J66-10 (SL+) - J66-3 (GND)*1

P - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-11 (SR+) - J66-3 (GND)*1

W - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

J66-12 (FL+) - J66-3 (GND)

R - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-13 (FR+) - J66-3 (GND)

LG - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

J66-16 (+B2) - J66-3 (GND)

L - W-B

Power source (+B)

Always

11 to 14 V

J66-17 (SPD) - J66-3 (GND)

Y - W-B

Vehicle speed signal

Engine switch on (IG)

Wheel being rotated

Pulse generation

J66-18 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

J66-19 (WFL-) - J66-3 (GND)

LG - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-20 (WFR-) - J66-3 (GND)

R - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

J66-21 (WF1-) - J66-3 (GND)*2

W - W-B

Sound signal (Woofer)

Audio system playing

A waveform synchronized with sound signals is output

J66-22 (CTR-) - J66-3 (GND)

V - W-B

Sound signal (Front Center)

Audio system playing

A waveform synchronized with sound signals is output

J66-23 (RL-) - J66-3 (GND)

Y - W-B

Sound signal (Rear Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-24 (RR-) - J66-3 (GND)

W - W-B

Sound signal (Rear Right)

Audio system playing

A waveform synchronized with sound signals is output

J66-25 (SL-) - J66-3 (GND)*1

R - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-26 (SR-) - J66-3 (GND)*1

GR - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

J66-27 (FL-) - J66-3 (GND)

BR - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

J66-28 (FR-) - J66-3 (GND)

L - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

J123-2 (MI+)

B

MOST communication signal

-

-

J123-3 (MI-)

B

MOST communication signal

-

-

J123-4 (SLDI)

Shielded

Shield ground

-

-

J123-5 (MO+)

B

MOST communication signal

-

-

J123-6 (MO-)

B

MOST communication signal

-

-

J123-7 (SLDO)

Shielded

Shield ground

-

-

J123-8 (WUI)

W

MOST communication wake-up signal

-

-

  • *1: for 15 Speakers

    *2: except 9 Speakers

MULTI-DISPLAY ASSEMBLY

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J56-2 (ILL) - J56-13 (GND1)

LG - LA

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

11 to 14 V

J56-7 (TX+)

GR

AVC-LAN communication signal

-

-

J56-8 (V+) - J56-9 (V-)*1

W - R

Video signal

Engine switch on (IG)

Shift lever in R

Camera lens not covered, displaying image

Pulse generation

(Refer to waveform 1)

Engine switch on (IG)

Shift lever in R

Camera lens covered, blacking out screen

Pulse generation

(Refer to waveform 2)

J56-9 (V-) - J56-13 (GND1)*1

R - LA

Ground

Always

Below 1 V

J56-10 (CA+) - J56-21(CGND)*1

B - G

Rear television camera assembly power supply

Engine switch on (ACC)

5.5 to 7.05 V

J56-11 (VMT1) - J56-13 (GND1)

Y - LA

Visual mute signal

When image on display switches

3.5 V or higher

→ Below 1 V

→ 3.5 V or higher

J56-12 (B) - J56-13 (GND1)

LA-B - LA

Power source (+B)

Always

11 to 14 V

J56-13 (GND1) - Body ground

LA - Body ground

Ground

Always

Below 1 Ω

J56-19 (TX-)

V

AVC-LAN communication signal

-

-

J56-20 (CSLD) - Body ground*1

Shielded - Body ground

Shield ground

Always

Below 1 Ω

J56-21 (CGND) - Body ground*1

G - Body ground

Camera ground

Always

Below 1 Ω

J56-24 (ACC) - J56-13 (GND1)

BE - LA

Power source (ACC)

Engine switch off

Below 1 V

Engine switch on (ACC)

11 to 14 V

J165-1 (GV+)

-

Video signal (Digital)

-

-

J165-2 (GV-)

-

Video signal (Digital)

-

-

J165-3 (GVG)

Shielded

Shield ground

-

-

J171-1 (GVI+)*2

-

Video signal (Digital)

-

-

J171-2 (GVI-)*2

-

Video signal (Digital)

-

-

J171-3 (GVG1)*2

Shielded

Shield ground

-

-

  • *1: w/ Parking Assist Monitor System

    *2: w/ Panoramic View Monitor System

(a) Reference (Oscilloscope waveform):

(w/ Parking Assist Monitor System)

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

Item

Content

Measurement terminal

J56-8 (V+) - J56-9 (V-)

Measurement setting

200 mV/DIV., 50 μs/DIV.

Condition

Engine switch on (IG), 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 engine switch is on (ACC).

*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

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

Item

Content

Measurement terminal

J56-8 (V+) - J56-9 (V-)

Measurement setting

200 mV/DIV., 50 μs/DIV.

Condition

Engine switch on (IG), 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 engine switch is on (ACC).

REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J154-1 (+B) - J154-10 (GND)

LA-SB - W-B

Power source (+B)

Always

11 to 14 V

J154-2 (ILL+) - J154-10 (GND)

V - W-B

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

11 to 14 V

J154-5 (ILL-) - J154-10 (GND)

B - W-B

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

Pulse generation

J154-6 (ACC) - J154-10 (GND)

R - W-B

Power source (ACC)

Engine switch on (ACC)

11 to 14 V

Engine switch off

Below 1 V

J154-8 (MO-)

W

Local bus communication signal

-

-

J154-9 (MO+)

P

Local bus communication signal

-

-

J154-10 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

CLOCK ASSEMBLY

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J79-1 (B) - G7-7 (E)

P - W-B

Power source (+B)

Always

11 to 14 V

J79-2 (ACC) - J79-7 (E)

LG - W-B

Power source (ACC)

Engine switch off

Below 1 V

Engine switch on (ACC)

11 to 14 V

J79-5 (TX+1)

Y

Local bus communication signal

-

 

J79-6 (TX-1)

W

Local bus communication signal

-

-

J79-7 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

COMBINATION METER ASSEMBLY

Click here

DCM (TELEMATICS TRANSCEIVER)

Click here

PARKING ASSIST ECU (w/ Panoramic View Monitor System)

Click here

REAR TELEVISION CAMERA ASSEMBLY (w/ Parking Assist Monitor System)

Click here

HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) (w/ Headup Display System)

Click here

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