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

c5-2 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

c5-7 (+B) - c5-2 (GND)

W*1, R*2 - W-B

Battery power supply

Always

11 to 14 V

c6-12 (SYSB) - c5-2 (GND)

P - W-B

System power source

Always

11 to 14 V

c6-3 (IG) - c5-2 (GND)

R - W-B

Ignition power supply

Engine switch on (IG)

11 to 14 V

c6-3 (IG) - c5-2 (GND)

R - W-B

Ignition power supply

Engine switch off

Below 1 V

c6-10 (DBCL) - Body ground

GR - Body ground

Driver seat belt buckle switch signal

Driver seat belt fastened

Below 1 Ω

c6-10 (DBCL) - Body ground

GR - Body ground

Driver seat belt buckle switch signal

Driver seat belt unfastened

10 kΩ or higher

c5-6 (+B2) - c5-2 (GND)

SB - W-B

Lumbar support adjuster power source

Always

11 to 14 V

c5-1 (GND2) - Body ground

W-B - Body ground

Lumbar support adjuster ground

Always

Below 1 Ω

c5-3 (SLD+) - c5-2 (GND)

L - W-B

Slide motor signal (forward)

Slide switch off

Below 1 V

Slide switch on (Forward)

11 to 14 V

c5-4 (SLD-) - c5-2 (GND)

GR - W-B

Slide motor signal (rearward)

Slide switch off

Below 1 V

Slide switch on (Rearward)

11 to 14 V

c5-5 (FRV-) - c5-2 (GND)

R - W-B

Front vertical motor signal (downward)

Front vertical switch off

Below 1 V

Front vertical switch on (Downward)

11 to 14 V

c5-8 (FRV+) - c5-2 (GND)

B - W-B

Front vertical motor signal (upward)

Front vertical switch off

Below 1 V

Front vertical switch on (Upward)

11 to 14 V

c5-9 (RCL+) - c5-2 (GND)

P - W-B

Reclining motor signal (forward)

Reclining switch off

Below 1 V

Reclining switch on (Forward)

11 to 14 V

c5-11 (RCL-) - c5-2 (GND)

LG - W-B

Reclining motor signal (rearward)

Reclining switch off

Below 1 V

Reclining switch on (Rearward)

11 to 14 V

c5-10 (LFT+) - c5-2 (GND)

V - W-B

Lifter motor signal (upward)

Lifter switch off

Below 1 V

Lifter switch on (Upward)

11 to 14 V

c5-12 (LFT-) - c5-2 (GND)

G - W-B

Lifter motor signal (downward)

Lifter switch off

Below 1 V

Lifter switch on (Downward)

11 to 14 V

c6-1 (SGND) - c5-2 (GND)

BR - W-B

Position sensor ground

Always

Below 1 Ω

c6-5 (SSRS) - c6-1 (SGND)

G- BR

Slide position signal

Slide function operating

4.8 to 5.1 V

N4-6 (CPUB) - N4-7 (GND)

L - W-B

Battery power supply

Always

11 to 14 V

N4-14 (BDR) - N4-7 (GND)

L - W-B

Battery power supply

Always

11 to 14 V

N4-5 (SIG) - N4-7 (GND)

Y - W-B

Ignition power supply

Engine switch on (IG)

11 to 14 V

N4-5 (SIG) - N4-7 (GND)

Y - W-B

Ignition power supply

Always

Below 1 V

N4-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

N4-1 (MM) - N4-7 (GND)

W - W-B

SET switch signal for seat memory switch LH

SET switch on

Below 1 V

SET switch off

11 to 14 V

N4-2 (M1) - N4-7 (GND)

G - W-B

M1 switch signal for seat memory switch LH

M1 switch on

Below 1 V

M1 switch off

11 to 14 V

N4-3 (M2) - N4-7 (GND)

V - W-B

M2 switch signal for seat memory switch LH

M2 switch on

Below 1 V

M2 switch off

11 to 14 V

N4-4 (M3) - N4-7 (GND)

R - W-B

M3 switch signal for seat memory switch LH

M3 switch on

Below 1 V

M3 switch off

11 to 14 V

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-32 (IG) - Body ground

-

Ignition power supply

Engine switch on (IG)

11 to 14 V

MB-32 (IG) - Body ground

-

Ignition power supply

Engine switch off

Below 1 V

MB-30 (ACC) - Body ground

-

Ignition power supply

Engine switch on (ACC)

11 to 14 V

MB-30 (ACC) - Body ground

-

Ignition power supply

Engine switch off

Below 1 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 (driver door) input

Front door LH closed (OFF) → open (ON)

10 kΩ or higher → Below 1 Ω