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

A37-1 (BATT) - D2-53 (E1)

G - BR

Battery (for measuring battery voltage and for ECM memory)

Always

11 to 14 V

A37-2 (+B) - D2-53 (E1)

R - BR

Power source of ECM

Engine switch on (IG)

11 to 14 V

A37-3 (+B2) - D2-53 (E1)

L - BR

Power source of ECM

Engine switch on (IG)

11 to 14 V

A37-13 (CANH) - D2-53 (E1)

Y - BR

CAN communication line

Engine switch on (IG)

Pulse generation

A37-17 (S) - D2-53 (E1)

B - BR

M shift position switch signal

Engine switch on (IG) and shift lever in M

11 to 14 V

Engine switch on (IG) and shift lever not in M

Below 1 V

A37-26 (CANL) - D2-53 (E1)

P - BR

CAN communication line

Engine switch on (IG)

Pulse generation

A37-27 (STP) - D2-53 (E1)

Y - BR

Stop light switch signal

Brake pedal depressed

7.5 to 14 V

Brake pedal released

Below 1 V

A37-37 (SFTD) - D2-53 (E1)

BE - BR

Down-shift switch signal

Engine switch on (IG)

11 to 14 V

Engine switch on (IG) and shift lever held in "-" (Down shift)

Below 1 V

Engine switch on (IG) and "-" shift paddle switch pulled

Below 1 V

A37-38 (SFTU) - D2-53 (E1)

V - BR

Up-shift switch signal

Engine switch on (IG)

11 to 14 V

Engine switch on (IG) and shift lever held in "+" (Up shift)

Below 1 V

Engine switch on (IG) and "+" shift paddle switch pulled

Below 1 V

A37-40 (SPCN) - D2-53 (E1)

SB - BR

Pattern select switch (NORMAL) signal

Engine switch on (IG) and pattern select switch being pushed and held at NORMAL position

Below 1.5 V

Engine switch on (IG) and pattern select switch not pushed

11 to 14 V

A37-43 (STA) - D2-53 (E1)

B - BR

Starter signal

Cranking (shift lever in P or N, engine switch on (START))

11 to 14 V

Engine switch on (IG) and shift lever in P or N

Below 2 V

A37-55 (PWMS) - D2-53 (E1)

GR - BR

Pattern select switch (SPORT) signal

Engine switch on (IG) and pattern select switch being turned and held at SPORT position

Below 1.5 V

Engine switch on (IG) and pattern select switch not turned

11 to 14 V

D2-6 (SL2+) - D2-7 (SL2-)

LG - Y

Shift solenoid valve SL2 signal

5th, 6th, 7th or 8th gear

Pulse generation

D2-10 (SL5+) - D2-11 (SL5-)

W - Y

Shift solenoid valve SL5 signal

2nd or 8th gear

Pulse generation

D2-12 (SL4+) - D2-13 (SL4-)

LG - GR

Shift solenoid valve SL4 signal

4th or 6th gear

Pulse generation

D2-14 (SL1+) - D2-15 (SL1-)

Y - BR

Shift solenoid valve SL1 signal

1st, 2nd, 3rd, 4th or 5th gear

Pulse generation

D2-31 (SL3+) - D2-1 (SL3-)

GR - B

Shift solenoid valve SL3 signal

3rd or 7th gear

Pulse generation

D2-53 (E1) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

D2-62 (S1) - D2-53 (E1)

G - BR

Shift solenoid valve S1 signal

11 to 14 V

D2-67 (SLT+) - D2-37 (SLT-)

L - GR

Shift solenoid valve SLT signal

Engine idling

Pulse generation

D2-72 (NCO) - D2-53 (E1)

Y - BR

Transmission Revolution Sensor (NC) signal

Vehicle being driven

Pulse generation

D2-73 (NCB) - D2-53 (E1)

L - BR

Power source for sensor

(specific voltage)

Engine switch on (IG)

11 to 14 V

D2-74 (NTO) - D2-53 (E1)

B - BR

Transmission Revolution Sensor (NT) signal

Engine idling (shift lever in P or N)

Pulse generation

D2-75 (NTB) - D2-53 (E1)

Y - BR

Power source for sensor

(specific voltage)

Engine switch on (IG)

11 to 14 V

D2-76 (SLU+) - D2-61 (SLU-)

L - B

Shift solenoid valve SLU signal

Pulse generation

D2-77 (S2) - D2-53 (E1)

BE - BR

Shift solenoid valve S2 signal

3rd gear

11 to 14 V

D2-78 (NC3B) - D2-53 (E1)

B - BR

Power source for sensor

(specific voltage)

Engine switch on (IG)

11 to 14 V

D2-86 (THO1) - D2-133 (ETHW)

W - BR

ATF temperature sensor signal

ATF temperature 115°C (239°F) or higher

Below 1.5 V

D2-106 (NSW) - D2-53 (E1)

V - BR

Park/neutral position switch signal

Engine switch on (IG) and shift lever in P or N

Below 1 V

Engine switch on (IG) and shift lever not in P or N

11 to 14 V

D2-107 (R) - D2-53 (E1)

GR - BR

R shift position switch signal

Engine switch on (IG) and shift lever in R

11 to 14 V

Engine switch on (IG) and shift lever not in R

Below 1 V

D2-108 (P) - D2-53 (E1)

V - BR

P shift position switch signal

Engine switch on (IG) and shift lever in P

11 to 14 V

Engine switch on (IG) and shift lever not in P

Below 1 V

D2-110 (NC3O) - D2-53 (E1)

W - BR

Transmission Revolution Sensor (NC3) signal

1st, 3rd, 4th, 5th, 6th or 7th gear

Pulse generation

D2-139 (D) - D2-53 (E1)

B - BR

D shift position switch signal

Engine switch on (IG) and shift lever in D or M

11 to 14 V

Engine switch on (IG) and shift lever not in D or M

Below 1 V

D2-140 (N) - D2-53 (E1)

BR - BR

N shift position switch signal

Engine switch on (IG) and shift lever in N

11 to 14 V

Engine switch on (IG) and shift lever not in N

Below 1 V