Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Terminals Of Ecu

J10-2 (MSM+) - Body ground

Y - Body ground

Steering pad switch signal

Engine switch on (IG), enter, back and top switches on steering pad switch assembly not pushed

4.3 to 6 V

Engine switch on (IG), enter switch on steering pad switch assembly pushed

Below 0.6 V

Engine switch on (IG), back switch on steering pad switch assembly pushed

2.3 to 3.2 V

Engine switch on (IG), top switch on steering pad switch assembly pushed

1 to 2 V

J10-3 (MSTI) - Body ground

LG - Body ground

Steering pad switch signal

Engine switch on (IG), up, down, right and left switches on steering pad switch assembly not pushed

4.3 to 6 V

Engine switch on (IG), up switch on steering pad switch assembly pushed

1 to 2 V

Engine switch on (IG), down switch on steering pad switch assembly pushed

2.3 to 3.2 V

Engine switch on (IG), right switch on steering pad switch assembly pushed

3.4 to 4.1 V

Engine switch on (IG), left switch on steering pad switch assembly pushed

Below 0.6 V

J10-4 (ODO) - Body ground

W - Body ground

ODO/TRIP switch signal

Engine switch on (IG), ODO/TRIP switch not pushed

4 to 6 V

Engine switch on (IG), ODO/TRIP switch pushed

Below 1 V

J10-6 (RRBT) - Body ground*1

W - Body ground

Rear No. 2 seat belt buckle switch RH signal

Engine switch on (IG), rear No. 2 seat belt RH unfastened

Below 1 V

Engine switch on (IG), rear No. 2 seat belt RH fastened

11 to 14 V

J10-8 (RLBT) - Body ground*1

R - Body ground

Rear No. 2 seat belt buckle switch LH signal

Engine switch on (IG), rear No. 2 seat belt LH unfastened

Below 1 V

Engine switch on (IG), rear No. 2 seat belt LH fastened

11 to 14 V

J10-9 (S) - Body ground

V - Body ground

Engine oil pressure signal

Engine started

11 to 14 V

Engine not started

Below 1 V

J10-12 (RRSB) - Body ground

W - Body ground

Rear seat belt buckle switch RH signal

Engine switch on (IG), rear seat belt RH unfastened

Below 1 V

Engine switch on (IG), rear seat belt RH fastened

11 to 14 V

J10-13 (RCSB) - Body ground*2

B - Body ground

Rear seat belt buckle switch center signal

Engine switch on (IG), rear seat belt center unfastened

Below 1 V

Engine switch on (IG), rear seat belt center fastened

11 to 14 V

J10-14 (RLSB) - Body ground

R - Body ground

Rear seat belt buckle switch LH signal

Engine switch on (IG), rear seat belt LH unfastened

Below 1 V

Engine switch on (IG), rear seat belt LH fastened

11 to 14 V

J10-15 (OILW) - Body ground

SB - Body ground

Engine oil level signal

Engine switch on (IG), engine oil level not low

11 to 14 V

Engine switch on (IG), engine oil level low

Below 1 V

J10-16 (WLVL) - Body ground

L - Body ground

Washer fluid level signal

Engine switch on (IG), washer fluid level not low

11 to 14 V

Engine switch on (IG), washer fluid level low

Below 1 V

J10-17 (SW) - Body ground

LG - Body ground

Brake fluid level signal

Engine switch on (IG), brake fluid level not low (brake warning light / red (malfunction) off)

11 to 14 V

Engine switch on (IG), brake fluid level low (brake warning light / red (malfunction) on)

Below 1 V

J10-18 (FV) - Body ground

R - Body ground

Fuel sender gauge (Power source)

Engine switch on (IG)

Pulse generation (See waveform 3)

J10-19 (+S) - Body ground

V - Body ground

Speed signal for other system (Output)

Engine switch on (IG), wheel being rotated

Pulse generation (See waveform 1)

J10-20 (SI) - Body ground

P - Body ground

Speed signal for other system (Input)

Engine switch on (IG), wheel being rotated

Pulse generation (See waveform 1)

J10-21 (IG+) - Body ground

GR - Body ground

Engine switch signal

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

J10-22 (B) - Body ground

G - Body ground

Battery

Always

11 to 14 V

J10-23 (IND) - Body ground

B - Body ground

Vacuum warning switch signal

Engine started, vacuum warning switch off (brake warning light / red (malfunction) off)

11 to 14 V

Engine started, vacuum warning switch on (brake warning light / red (malfunction) on)

Below 1 V

J10-25 (TR) - Body ground

BE - Body ground

Light control rheostat switch signal

Engine switch on (IG), up switch and down switch of trip switch not pushed

4 to 6 V

Engine switch on (IG), up switch or down switch of trip switch pushed

Below 1 V

J10-26 (SW3) - Body ground

V - Body ground

Ground for trip switch

Always

Below 1 Ω

J10-27 (FR) - J10-28 (FE)

P - G

Fuel level signal

Engine switch on (IG), fuel level full → low (fuel level warning light on)

Pulse generation (See waveform 2)

J10-29 (CANH)

GR

CAN communication line

-

-

J10-30 (CANL)

W

CAN communication line

-

-

J10-31 (ES) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

J10-32 (L) - Body ground*1

L - Body ground

Rear seat belt warning light (rear No. 2 seat LH) output signal

Engine switch on (IG), rear seat belt warning light (rear No. 2 seat LH) off

11 to 14 V

Engine switch on (IG), rear seat belt warning light (rear No. 2 seat LH) on

Below 1 V

J10-33 (SW) - Body ground*1

R - Body ground

Rear seat belt warning light (rear No. 2 seat RH) output signal

Engine switch on (IG), rear seat belt warning light (rear No. 2 seat RH) off

11 to 14 V

Engine switch on (IG), rear seat belt warning light (rear No. 2 seat RH) on

Below 1 V

J10-35 (RLMT) - Body ground

Y - Body ground

Rear seat belt warning light LH output signal

Engine switch on (IG), rear seat belt warning light LH off

11 to 14 V

Engine switch on (IG), rear seat belt warning light LH on

Below 1 V

J10-36 (RCMT) - Body ground*2

W - Body ground

Rear seat belt warning light center output signal

Engine switch on (IG), rear seat belt warning light center off

11 to 14 V

Engine switch on (IG), rear seat belt warning light center on

Below 1 V

J10-37 (RRMT) - Body ground

B - Body ground

Rear seat belt warning light RH output signal

Engine switch on (IG), rear seat belt warning light RH off

11 to 14 V

Engine switch on (IG), rear seat belt warning light RH on

Below 1 V

J10-38 (IL2-) - Body ground

G - Body ground

Illumination signal

Headlight dimmer switch off

Below 1 V

Headlight dimmer switch in tail or head position

Pulse generation

J10-39 (ILL-) - Body ground

L - Body ground

Illumination signal

Headlight dimmer switch off

Below 1 V

Headlight dimmer switch in tail or head position

Pulse generation

J10-40 (EP) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

J11-1 (B) - Body ground

Y - Body ground

Battery

Always

11 to 14 V

J11-2 (HZSW) - Body ground

GR - Body ground

Hazard warning signal switch signal (Input)

Hazard warning signal switch not pressed

11 to 14 V

Hazard warning signal switch pressed

Below 1 V

J11-3 (ER) - Body ground

SB - Body ground

RH turn signal switch signal

Engine switch on (IG), RH turn signal switch off

11 to 14 V

Engine switch on (IG), RH turn signal switch on

Below 1 V

J11-4 (EL) - Body ground

BE - Body ground

LH turn signal switch signal

Engine switch on (IG), LH turn signal switch off

11 to 14 V

Engine switch on (IG), LH turn signal switch on

Below 1 V

J11-5 (TRNR) - Body ground

V - Body ground

Rear turn signal light LH signal

Engine switch on (IG), LH turn indicator light off

Below 1 V

Engine switch on (IG), LH turn indicator light blinking

11 to 14 V ←→ Below 1 V

J11-6 (INT) - Body ground

L - Body ground

Tire pressure warning ECU and receiver signal

Engine switch on (IG)

8 to 15 V

Engine switch on (IG), steering pad switch assembly operated, "TPMS" selected on the multi-information display and "ENTER" switch (steering pad switch assembly) pressed and held

Below 1.5 V

J11-7 (LR) - Body ground

W - Body ground

Front and side turn signal light RH signal

Engine switch on (IG), RH turn indicator light off

Below 1 V

Engine switch on (IG), RH turn indicator light blinking

11 to 14 V ←→ Below 1 V

J11-8 (SW) - Body ground

B - Body ground

Turn signal switch signal

Engine switch on (IG), LH and RH turn signal switch off

11 to 14 V

Engine switch on (IG), LH or RH turn signal switch on

Below 1 V

J11-9 (TX-)

W

Local bus communication line

-

-

J11-10 (TX+)

LG

Local bus communication line

-

-

J11-11 (TRNL) - Body ground

G - Body ground

Rear turn signal light RH signal

Engine switch on (IG), RH turn indicator light off

Below 1 V

Engine switch on (IG), RH turn indicator light blinking

11 to 14 V ←→ Below 1 V

J11-12 (HAZM) - Body ground

P - Body ground

Hazard warning signal switch signal (Output)

Hazard warning signal switch not pressed

11 to 14 V

Hazard warning signal switch pressed

Below 1 V

J11-13 (LL) - Body ground

R - Body ground

Front and side turn signal light LH signal

Engine switch on (IG), LH turn indicator light off

Below 1 V

Engine switch on (IG), LH turn indicator light blinking

11 to 14 V ←→ Below 1 V

Tool setting

5 V/DIV., 20 ms./DIV.

Vehicle condition

Engine switch on (IG), wheel being rotated

Tool setting

5 V/DIV., 20 ms./DIV.

Vehicle condition

Engine switch on (IG), fuel level full → low

Tool setting

2.5 V/DIV., 20 ms./DIV.

Condition

Engine switch on (IG)

Specified Condition

4.5 to 5.5 V