Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Terminals Of Ecu

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-32 (IG) - Body ground

-

Ignition power supply (IG signal)

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

MB-30 (ACC) - Body ground

-

Ignition power supply (ACC signal)

Engine switch off

Below 1 V

Engine switch on (ACC)

11 to 14 V

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

J8-6 (FLCY) - Body ground

P - Body ground

Front door courtesy light switch assembly (for LH) input

Front door LH closed

10 kΩ or higher

Front door LH open

Below 1 Ω

J8-27 (FRCY) - Body ground

R - Body ground

Front door courtesy light switch assembly (for RH) input

Front door RH closed

10 kΩ or higher

Front door RH open

Below 1 Ω

MB-13 (LCTY) - Body ground

-

Rear door courtesy light switch assembly (for LH) input

Rear door LH closed

10 kΩ or higher

Rear door LH open

Below 1 Ω

MB-2 (RCTY) - Body ground

-

Rear door courtesy light switch assembly (for RH) input

Rear door RH closed

10 kΩ or higher

Rear door RH open

Below 1 Ω

J8-11 (HCTY) - Body ground

R - Body ground

Engine hood courtesy switch input

Engine hood open

10 kΩ or higher

Engine hood closed

Below 1 Ω

MB-14 (TRLY) - Body ground

-

Taillight relay drive output

Always

11 to 14 V

2B-13 (LSFL) - Body ground

B - Body ground

Front door LH unlock detection switch input

Front door LH unlocked

Below 1 V

Front door LH locked

Pulse generation

2B-12 (LSFR) - Body ground

P - Body ground

Front door RH unlock detection switch input

Front door RH unlocked

Below 1 V

Front door RH locked

Pulse generation

J8-29 (L2) - Body ground

P - Body ground

Driver door key-linked lock input

Driver door key cylinder turned to lock position

Below 1 V

Driver door key cylinder off

Pulse generation

J8-2 (UL3) - Body ground

V - Body ground

Driver door key-linked unlock input

Driver door key cylinder turned to unlock position

Below 1 V

Driver door key cylinder off

Pulse generation

2B-14 (LSWL) - Body ground

V - Body ground

Rear door LH unlock detection switch input

Rear door LH unlocked

Below 1 V

Rear door LH locked

Pulse generation

J9-2 (LSWR) - Body ground

L - Body ground

Rear door RH unlock detection switch input

Rear door RH unlocked

Below 1 V

Rear door RH locked

Pulse generation

2C-26 (SH) - Body ground*1

L - Body ground

Security horn assembly drive

Security horn assembly sounding

(Theft deterrent system in alarm sounding state)

Pulse generation

(Below 1 V ← → 11 to 14 V)

J9-18 (SSCL) - Body ground*2

W - Body ground

Theft warning siren assembly drive

Theft warning siren assembly sounding

(Theft deterrent system in alarm sounding state)

Pulse generation

(Below 1 V ← → 11 to 14 V)

2C-27 (HORN) - Body ground

G - Body ground

Vehicle horns drive

Vehicle horns sounding

(Theft deterrent system in alarm sounding state)

Pulse generation

(Below 1 V ← → 11 to 14 V)

2C-31 (HRLY) - Body ground

V - Body ground*3

B - Body ground*4

Headlight relay drive output

Low beams blinking

(Theft deterrent system in alarm sounding state)

Pulse generation

(Below 1 V ← → 11 to 14 V)

2B-29 (ILE) - Body ground

GR - Body ground

Interior lights drive output

Interior lights illuminated

(Theft deterrent system in alarm sounding state)

Below 1 V