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

N4-14 (BDR) - Body ground

L - Body ground

+B power supply

Always

11 to 14 V

N4-6 (CPUB) - Body ground

L - Body ground

+B power supply

Always

11 to 14 V

N4-5 (SIG) - Body ground

Y - Body ground

Ignition power supply

Engine switch off → on (IG)

Below 1 V → 11 to 14 V

N4-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

z12-3 (MR) - Body ground

SB - Body ground

Power retract mirror motor drive voltage

Outer rear view mirror assembly (driver door) being retracted

11 to 14 V

Outer rear view mirror assembly (driver door) stopped

Below 1 V

z12-11 (MF) - Body ground

LG - Body ground

Power retract mirror motor drive voltage

Outer rear view mirror assembly (driver door) returning

11 to 14 V

Outer rear view mirror assembly (driver door) stopped

Below 1 V

z12-1 (MV) - z12-10 (M+)

V - R

Vertical mirror motor drive voltage

Driver door mirror surface moving upward → stopped

11 to 14 V → Below 1 V

z12-10 (M+) - z12-1 (MV)

R - V

Vertical mirror motor drive voltage

Driver door mirror surface moving downward → stopped

11 to 14 V → Below 1 V

z12-10 (M+) - z12-9 (MH)

R - BR

Horizontal mirror motor drive voltage

Driver door mirror surface moving right → stopped

11 to 14 V → Below 1 V

z12-9 (MH) - z12-10 (M+)

BR - R

Horizontal mirror motor drive voltage

Driver door mirror surface moving left → stopped

11 to 14 V → Below 1 V

z12-4 (HTR+) - z12-12 (TRN-)

B-G - W

Mirror heater relay drive voltage

Mirror heater switch (rear window defogger switch) on

11 to 14 V

z12-5 (VDD) - N4-7 (GND)

O - W-B

Mirror position sensor power supply

Engine switch on (IG)

4.75 to 5.25 V

z12-6 (VSSR) - N4-7 (GND)

W-B - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

z12-13 (HSSR) - N4-7 (GND)

Y-B - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

z12-7 (EC+) - z12-15 (EC-)

L-Y - B-R

Automatic glare-resistant EC mirror drive signal

Automatic glare-resistant EC mirror on

1.05 to 1.35 V

Automatic glare-resistant EC mirror off

Below 1 V

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

R - W-B

M3 switch signal for seat memory switch

M3 switch on

Below 1 V

M3 switch off

11 to 14 V

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

V - W-B

M2 switch signal for seat memory switch

M2 switch on

Below 1 V

M2 switch off

11 to 14 V

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

G - W-B

M1 switch signal for seat memory switch

M1 switch on

Below 1 V

M1 switch off

11 to 14 V

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

W - W-B

SET switch signal for seat memory switch

SET switch on

Below 1 V

SET switch off

11 to 14 V

M4-14 (BDR) - Body ground

G - Body ground

+B power supply

Always

11 to 14 V

M4-6 (CPUB) - Body ground

GR - Body ground

+B power supply

Always

11 to 14 V

M4-5 (SIG) - Body ground

B - Body ground

Ignition power supply

Engine switch off → on (IG)

Below 1 V → 11 to 14 V

M4-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

z13-3 (MR) - Body ground

SB - Body ground

Power retract mirror motor drive voltage

Outer rear view mirror assembly (front passenger door) being retracted

11 to 14 V

Outer rear view mirror assembly (front passenger door) stopped

Below 1 V

z13-11 (MF) - Body ground

LG - Body ground

Power retract mirror motor drive voltage

Outer rear view mirror assembly (front passenger door) returning

11 to 14 V

Outer rear view mirror assembly (front passenger door) stopped

Below 1 V

z13-1 (MV) - z13-10 (M+)

V - R

Vertical mirror motor drive voltage

Front passenger door mirror surface moving upward → stopped

11 to 14 V → Below 1 V

z13-10 (M+) - z13-1 (MV)

R - V

Vertical mirror motor drive voltage

Front passenger door mirror surface moving downward → stopped

11 to 14 V → Below 1 V

z13-10 (M+) - z13-9 (MH)

R - BR

Horizontal mirror motor drive voltage

Front passenger door mirror surface moving right → stopped

11 to 14 V → Below 1 V

z13-9 (MH) - z13-10 (M+)

BR - R

Horizontal mirror motor drive voltage

Front passenger door mirror surface moving left → stopped

11 to 14 V → Below 1 V

z13-4 (HTR+) - z13-12 (TRN-)

B-G - W

Mirror heater relay drive voltage

Mirror heater switch (rear window defogger switch) on

11 to 14 V

z13-5 (VDD) - M4-7 (GND)

O - W-B

Mirror position sensor power supply

Engine switch on (IG)

4.75 to 5.25 V

z13-6 (VSSR) - M4-7 (GND)

W-B - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

z13-13 (HSSR) - M4-7 (GND)

Y-B - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

z13-7 (EC+) - z13-15 (EC-)

L-T - B-R

Automatic glare-resistant EC mirror drive signal

Automatic glare-resistant EC mirror on

1.05 to 1.35 V

Automatic glare-resistant EC mirror off

Below 1 V