Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Terminals Of Ecu

2B-3 - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

2C-1 - Body ground

GR - Body ground

Battery power supply

Always

11 to 14 V

2E-1 - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

2C-19 - Body ground

LA-R - Body ground

BKUP LP relay drive output

Engine switch off, reverse (R) not selected

Below 1 V

Engine switch on (IG), reverse (R) selected

11 to 14 V

2C-31 - Body ground

B - Body ground

H-LP LH relay drive output

Engine switch on (IG) or taillights on

Below 1 V

Engine switch off and taillights off

11 to 14 V

2C-32 - Body ground

SB - Body ground

Parking lights and front side marker lights drive output

Taillights on

11 to 14 V

Taillights off

Below 1 V

2D-10 - Body ground

R - Body ground

Back-up lights drive output

Engine switch off, reverse (R) not selected

Below 1 V

Engine switch on (IG), reverse (R) selected

11 to 14 V

2D-30 - Body ground

B - Body ground

Taillights, rear side marker lights and license plate lights drive output

Taillights on

11 to 14 V

Taillights off

Below 1 V

J8-1 (DIM) - Body ground

L - Body ground

H-LP RH relay drive output

Engine switch on (IG) or taillights on

Below 1 V

Engine switch off and taillights off

11 to 14 V

J8-3 (RLEW) - Body ground

GR - Body ground

Light control ECU signal input

Engine switch on (IG), taillight off

11 to 14 V

Engine switch on (IG), light control switch in head position

Pulse generation

J8-8 (A) - Body ground

G - Body ground

Light control switch AUTO position signal input

Light control switch in AUTO position

Below 1 V

Light control switch not in AUTO position

Pulse generation

J8-10 (HF) - Body ground

W - Body ground

Dimmer switch high flash position signal input

Dimmer switch in high flash position

Below 1 V

Dimmer switch not in high flash position

Pulse generation

J8-12 (HEAD) - Body ground

Y - Body ground

Light control switch head position input

Light control switch in head position

Below 1 V

Light control switch not in head position

Pulse generation

J8-16 (LLEW) - Body ground

LG - Body ground

Light control ECU signal input

Engine switch on (IG), taillight off

11 to 14 V

Engine switch on (IG), light control switch in head position

Pulse generation

J8-19 (CLTB) - J8-21 (CLTE)

V - Y

Automatic light control sensor power supply output

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

J8-20 (CLTS) - Body ground

BE - Body ground

Automatic light control sensor signal input

Engine switch off

Below 1 V

Engine switch on (IG)

(See waveform 1)

Pulse generation

J8-22 (TAIL) - Body ground

V - Body ground

Light control switch tail position signal input

Taillights on

Below 1 V

Taillights off

Pulse generation

J8-24 (HU) - Body ground

GR - Body ground

Dimmer switch high position signal input

Dimmer switch in high position

Below 1 V

Dimmer switch not in high position

Pulse generation

J9-4 (MILE) - Body ground

SB - Body ground

Outside handle foot lights drive output

Outside handle foot light illuminates

11 to 14 V

Outside handle foot light off

Below 3 V

J9-23 (AHBI) - Body ground*

G - Body ground

Automatic high beam switch signal input

Automatic high beam switch on

Below 1 V

Automatic high beam switch off

Pulse generation

Tester Connection

J8-20 (CLTS) - Body ground

Tool setting

2 V/DIV., 10 ms./DIV.

Condition

Engine switch on (IG)