Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028EKV
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [11/2022 -           ]
Title: K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]

TERMINALS OF ECU

TCM

HINT:

The standard voltage and resistance between each pair of TCM terminals is shown in the table below.

The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage or resistance for that pair of terminals shown in the "Specified Condition" column.

Use the illustration above as a reference for the TCM terminals.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition
*1: w/ Sequential Shift

*2: w/o Sequential Shift

C80-1 (+B) - C80-2 (E1)

R - W-B

Power source of TCM

Engine switch on (IG)

11 to 14 V

C80-2 (E1) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

C80-4 (SLS+) - C80-3 (SLS-)

B - L

Shift solenoid valve SLS signal

Engine idling

Pulse generation

C80-6 (SLU+) - C80-5 (SLU-)

G - GR

Shift solenoid valve SLU signal

Lock-up turned from OFF to ON

Pulse generation

C80-7 (NSSO) - C80-2 (E1)

R - W-B

Transmission revolution sensor (NSS) signal

Vehicle being driven with shift lever in D

Pulse generation

C80-8 (NC1O) - C80-2 (E1)

V - W-B

Transmission revolution sensor (NC1) signal

Vehicle being driven in gear mode

Pulse generation

C80-9 (NTO) - C80-2 (E1)

L - W-B

Transmission revolution sensor (NT) signal

Vehicle being driven with shift lever in D

Pulse generation

C80-10 (NOO) - C80-2 (E1)

GR - W-B

Transmission revolution sensor (NOUT) signal

Vehicle being driven with shift lever in D

Pulse generation

C80-13 (NE) - C80-2 (E1)

B - W-B

Crankshaft position sensor signal from ECM

Engine idling with warm engine

Pulse generation

C80-14 (S) - C80-2 (E1)*1

B - W-B

M position switch signal
  • Engine switch on (IG)
  • Shift lever in M

11 to 14 V
  • Engine switch on (IG)
  • Shift lever not in M

Below 1 V

C80-14 (B) - C80-2 (E1)*2

GR - W-B

B position switch signal
  • Engine switch on (IG)
  • Shift lever in B

11 to 14 V
  • Engine switch on (IG)
  • Shift lever not in B

Below 1 V

C80-15 (CANH) - C80-2 (E1)

Y - W-B

CAN communication line

Engine switch on (IG)

Pulse generation

C80-16 (CANL) - C80-2 (E1)

W - W-B

CAN communication line

Engine switch on (IG)

Pulse generation

C80-17 (CAN-) - C80-2 (E1)

V - W-B

CAN communication line to ECM

Engine switch on (IG)

Pulse generation

C80-18 (CAN+) - C80-2 (E1)

P - W-B

CAN communication line to ECM

Engine switch on (IG)

Pulse generation

C80-19 (SL2+) - C80-20 (SL2-)

SB - R

Shift solenoid valve SL2 signal

Vehicle being driven in belt mode

Pulse generation

C80-21 (SLG+) - C80-22 (SLG-)

W - V

Shift solenoid valve SLG signal
  • Vehicle being driven in gear mode
  • Shift lever in P

Pulse generation

C80-23 (NSSB) - C80-2 (E1)

W - W-B

Power source of transmission revolution sensor (NSS)

Engine switch on (IG)

11 to 14 V

C80-24 (NC1B) - C80-2 (E1)

P - W-B

Power source of transmission revolution sensor (NC1)

Engine switch on (IG)

11 to 14 V

C80-25 (NTB) - C80-2 (E1)

G - W-B

Power source of transmission revolution sensor (NT)

Engine switch on (IG)

11 to 14 V

C80-26 (NOB) - C80-2 (E1)

P - W-B

Power source of transmission revolution sensor (NOUT)

Engine switch on (IG)

11 to 14 V

C80-27 (SFTD) - C80-2 (E1)

L - W-B

Down-shift switch signal
  • Engine switch on (IG)
  • Shift lever in M

11 to 14 V
  • Engine switch on (IG)
  • Shift lever held in "-"

Below 1 V

C80-28 (SFTU) - C80-2 (E1)

R - W-B

Up-shift switch signal
  • Engine switch on (IG)
  • Shift lever in M

11 to 14 V
  • Engine switch on (IG)
  • Shift lever held in "+"

Below 1 V

C80-29 (P) - C80-2 (E1)

LG - W-B

P position switch signal
  • Engine switch on (IG)
  • Shift lever in P

11 to 14 V
  • Engine switch on (IG)
  • Shift lever not in P

Below 1 V

C80-30 (R) - C80-2 (E1)

W - W-B

R position switch signal
  • Engine switch on (IG)
  • Shift lever in R

11 to 14 V
  • Engine switch on (IG)
  • Shift lever not in R

Below 1 V

C80-31 (D) - C80-2 (E1)

P - W-B

D position switch signal
  • Engine switch on (IG)
  • Shift lever in D

11 to 14 V
  • Engine switch on (IG)
  • Shift lever not in D

Below 1 V

C80-32 (N) - C80-2 (E1)

R - W-B

N position switch signal
  • Engine switch on (IG)
  • Shift lever in N

11 to 14 V
  • Engine switch on (IG)
  • Shift lever not in N

Below 1 V

C80-38 (SL1+) - C80-37 (SL1-)

P - LG

Shift solenoid valve SL1 signal

Vehicle being driven in gear mode

Pulse generation

C80-40 (SLP+) - C80-39 (SLP-)

L - Y

Shift solenoid valve SLP signal

Engine idling

Pulse generation

C80-41 (IGSW) - C80-2 (E1)

B - W-B

Engine switch signal

Engine switch on (IG)

11 to 14 V

C80-43 (STP) - C80-2 (E1)

GR - W-B

Stop light switch assembly signal

Brake pedal depressed

7.5 to 14 V

Brake pedal released

Below 1.5 V

C80-45 (VCSF) - C80-44 (E2SF)

B - W

Power source of shift stroke sensor

Engine switch on (IG)

4.5 to 5.5 V

C80-46 (SFV) - C80-44 (E2SF)

G - W

Shift stroke sensor signal

Synchronizer engaged

1.19 to 1.29 V

Synchronizer not engaged

3.64 to 3.74 V

C80-49 (VCPT) - C80-48 (EPTO)

L - V

Power source of oil pressure sensor

Engine switch on (IG)

4.5 to 5.5 V

C80-50 (PTO) - C80-48 (EPTO)

G - V

Oil pressure sensor signal

Engine idling with shift lever in P

0.8 to 1.2 V

C80-51 (THO1) - C80-52 (ETHO)

B - SB

CVT fluid temperature sensor signal

CVT fluid temperature: 60 to 120°C (140 to 248°F)

0.2 to 1.0 V

ECM

HINT:

The standard voltage and resistance between each pair of ECM terminals is shown in the table below.

The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage or resistance for that pair of terminals shown in the "Specified Condition" column.

Use the illustration above as a reference for the ECM terminals.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A47-9 (+B) - A47-10 (E1)

BE - W-B

Power source of ECM

Engine switch on (IG)

11 to 14 V

A47-16 (NEO) - A47-10 (E1)

BR - W-B

Crankshaft position sensor signal to TCM

Engine idling with warm engine

Pulse generation

A47-28 (ECCS) - A47-10 (E1)

BR - W-B

Shift paddle switch ground

Always

Below 1 Ω

A47-31 (YZK) - A47-10 (E1)

LG - W-B

Drive mode select switch (combination switch assembly) signal
  • Engine switch on (IG)
  • Drive mode select switch (combination switch assembly) in neutral position

11 to 14 V
  • Engine switch on (IG)
  • Drive mode select switch (combination switch assembly) pushed forward

Below 1.5 V

A47-35 (+B2) - A47-10 (E1)

BE - W-B

Power source of ECM

Engine switch on (IG)

11 to 14 V

A47-41 (DMS-) - A47-10 (E1)

Y - W-B

Drive mode select switch (combination switch assembly) signal
  • Engine switch on (IG)
  • Drive mode select switch (combination switch assembly) in neutral position

11 to 14 V
  • Engine switch on (IG)
  • Drive mode select switch (combination switch assembly) pulled rearward

Below 1.5 V

C76-39 (CANN) - A47-10 (E1)

V - W-B

CAN communication line to TCM

Engine switch on (IG)

Pulse generation

C76-40 (CANP) - A47-10 (E1)

P - W-B

CAN communication line to TCM

Engine switch on (IG)

Pulse generation