Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GCRA
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): TERMINALS OF ECU; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

TERMINALS OF ECU

HYBRID VEHICLE CONTROL ECU

Terminal No.

(Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

A57-2 (R) - I3-3 (E1)

L - W-B

IN

Shift lever position signal

Power switch on (IG), shift lever in R

7.5 to 14 V

Power switch on (IG), shift lever not in R

0 to 1.5 V

A57-3 (DB1) - I3-3 (E1)

W - W-B

IN

Shift lever position signal

Power switch on (IG), shift lever in D or B

7.5 to 14 V

Power switch on (IG), shift lever not in D or B

0 to 1.5 V

A57-4 (HMCH) - I3-3 (E1)

B - W-B

IN/OUT

Communication signal

Power switch on (IG)

Pulse generation

(Waveform 1)

A57-5 (MREL) - I3-3 (E1)

BE - W-B

OUT

Main relay

Power switch on (IG)

11 to 14 V

A57-6 (HSDN) - I3-3 (E1)

B - W-B

OUT

MG ECU shutdown signal

Power switch on (READY)

0 to 1.5 V

A57-7 (STP) - I3-3 (E1)

SB - W-B

IN

Stop light switch

Brake pedal depressed

11 to 14 V

Brake pedal released

0 to 1.5 V

A57-8 (LIN3) - I3-3 (E1)

W - W-B

IN/OUT

LIN communication signal

(A/C inverter, auxiliary battery state sensor)

Power switch on (READY)

Pulse generation

A57-11 (+B1) - I3-3 (E1)

L - W-B

IN

Power source

Power switch on (IG)

11 to 14 V

A57-13 (DRN5) - Body ground

L - Body ground

-

Shield ground

Always

Below 1 Ω

A57-14 (HMCL) - I3-3 (E1)

W - W-B

IN/OUT

Communication signal

Power switch on (IG)

Pulse generation

(Waveform 1)

A57-15 (DB2) - I3-3 (E1)

G - W-B

IN

Shift lever position signal

Power switch on (IG), shift lever in D or B

7.5 to 14 V

Power switch on (IG), shift lever not in D or B

0 to 1.5 V

A57-16 (PR) - I3-3 (E1)

V - W-B

IN

Shift lever position signal

Power switch on (IG), shift lever in P or R

7.5 to 14 V

Power switch on (IG), shift lever not in P or R

0 to 1.5 V

A57-18 (PSFT) - I3-3 (E1)

R - W-B

OUT

Shift lever position sensor power source

Power switch on (ACC)

7.5 to 14 V

A57-20 (BL) - I3-3 (E1)

LG - W-B

OUT

Back-up light relay

Power switch on (IG), shift lever in R

11 to 14 V

A57-24 (VCPA) - A57-37 (EPA)

Y - L

OUT

Accelerator pedal sensor assembly power source (for VPA)

Power switch on (IG)

4.5 to 5.5 V

A57-26 (VCP2) - A57-25 (EPA2)

G - W

OUT

Accelerator pedal sensor assembly power source (for VPA2)

Power switch on (IG)

4.5 to 5.5 V

A57-28 (P) - I3-3 (E1)

Y - W-B

IN

Shift lever position signal

Power switch on (IG), shift lever in P

7.5 to 14 V

Power switch on (IG), shift lever not in P

0 to 1.5 V

A57-29 (N) - I3-3 (E1)

SB - W-B

IN

Shift lever position signal

Power switch on (IG), shift lever in N

7.5 to 14 V

Power switch on (IG), shift lever not in N

0 to 1.5 V

A57-30 (PNB) - I3-3 (E1)

P - W-B

IN

Shift lever position signal

Power switch on (IG), shift lever in P or N

7.5 to 14 V

A57-33 (NIWP) - I3-3 (E1)

SB - W-B

IN

Inverter water pump assembly signal

Power switch on (READY)

Pulse generation

(Waveform 2)

A57-34 (IWP) - I3-3 (E1)

G - W-B

OUT

Inverter water pump assembly signal

Power switch on (READY)

Pulse generation

(Waveform 2)

A57-36 (VPA) - A57-37 (EPA)

R - L

IN

Accelerator pedal sensor assembly (for accelerator pedal position detection)

Power switch on (IG), accelerator pedal released

0.4 to 1.4 V

Power switch on (IG), engine stopped, shift position P, accelerator pedal fully depressed

2.6 to 4.5 V

A57-38 (VPA2) - A57-25 (EPA2)

B - W

IN

Accelerator pedal sensor assembly (for accelerator pedal sensor malfunction detection)

Power switch on (IG), accelerator pedal released

1.0 to 2.2 V

Power switch on (IG), engine stopped, shift position P, accelerator pedal fully depressed

3.4 to 5.3 V

A57-40 (TTA) - A57-39 (ETTA)

P - R

IN

Transmission fluid temperature sensor

Power switch on (IG), temperature 25°C (77°F)

3.6 to 4.6 V

Power switch on (IG), temperature 60°C (140°F)

2.2 to 3.2 V

A57-46 (MMT) - A57-45 (MMTG)

L - BR

IN

Motor temperature sensor

Power switch on (IG), temperature 25°C (77°F)

3.6 to 4.6 V

Power switch on (IG), temperature 60°C (140°F)

2.2 to 3.2 V

A57-48 (GMT) - A57-47 (GMTG)

B - R

IN

Generator temperature sensor

Power switch on (IG), temperature 25°C (77°F)

3.6 to 4.6 V

Power switch on (IG), temperature 60°C (140°F)

2.2 to 3.2 V

I2-5 (ILK) - I3-3 (E1)

V - W-B

IN

Interlock switch

Power switch on (IG), service plug grip installed correctly

0 to 1.5 V

Power switch on (IG), service plug grip not installed

11 to 14 V

I2-7 (CA3P) - I3-3 (E1)

R - W-B

IN/OUT

CAN communication signal

Power switch on (IG)

Pulse generation

(Waveform 3)

I2-8 (CA1L) - I3-3 (E1)

W - W-B

IN/OUT

CAN communication signal

Power switch on (IG)

Pulse generation

(Waveform 4)

I2-11 (E02) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

I2-12 (E01) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

I2-13 (SMRG) - I2-12 (E01)

Y - W-B

OUT

System main relay operation signal

Power switch on (IG)→Power switch on (READY)

Pulse generation

(Waveform 5)

I2-15 (SMRP) - I2-12 (E01)

W - W-B

OUT

System main relay operation signal

Power switch on (IG)→Power switch on (READY)

Pulse generation

(Waveform 5)

I2-16 (SMRB) - I2-12 (E01)

SB - W-B

OUT

System main relay operation signal

Power switch on (IG)→Power switch on (READY)

Pulse generation

(Waveform 5)

I2-20 (CA3N) - I3-3 (E1)

W - W-B

IN/OUT

CAN communication signal

Power switch on (IG)

Pulse generation

(Waveform 3)

I2-21 (CA1H) - I3-3 (E1)

L - W-B

IN/OUT

CAN communication signal

Power switch on (IG)

Pulse generation

(Waveform 4)

I2-25 (PLKC) - I3-3 (E1)

B - W-B

OUT

Shift lock release request signal

Power switch on (READY), brake pedal depressed

11 to 14 V

Power switch on (READY), brake pedal released

0 to 1.5 V

I2-28 (ST1-) - I3-3 (E1)

LA-R - W-B

IN

Stop light switch signal

Power switch on (IG), brake pedal depressed

0 to 1.5 V

Power switch on (IG), brake pedal released

11 to 14 V

I2-29 (ACCI) - I3-3 (E1)

B - W-B

IN

ACC relay

Power switch on (ACC)

11 to 14 V

I2-34 (E12) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

I2-35 (IG2) - I3-3 (E1)

LG - W-B

IN

Power source

Power switch on (IG)

11 to 14 V

I2-38 (SI0) - I3-3 (E1)

Y - W-B

OUT

Battery cooling blower operation signal

Battery cooling blower operating

Pulse generation

(Waveform 6)

Battery cooling blower not operating

4.5 to 5.5 V

I2-41 (BTH+) - I3-3 (E1)

R - W-B

IN

Communication signal from battery voltage sensor to hybrid vehicle control ECU

Power switch on (IG)

Pulse generation

(Waveform 7)

I2-42 (BTH-) - I3-3 (E1)

G - W-B

IN

Communication signal from battery voltage sensor to hybrid vehicle control ECU

Power switch on (IG)

Pulse generation

(Waveform 7)

I3-1 (+B2) - I3-3 (E1)

L - W-B

IN

Power source

Power switch on (IG)

11 to 14 V

I3-3 (E1) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

I3-4 (ST2) - I3-3 (E1)

V - W-B

IN

Starter signal

Power switch on (IG)

0 to 1.5 V

I3-7 (INDR) - I3-3 (E1)

LA-R - W-B

IN

Shift position indicator signal

Power switch on (IG), shift lever in R

0 to 3.2 V

Power switch on (IG), shift lever not in R

11 to 14 V

I3-8 (INDD) - I3-3 (E1)

LA-W - W-B

IN

Shift position indicator signal

Power switch on (IG), shift lever in D

0 to 3.2 V

Power switch on (IG), shift lever not in D

11 to 14 V

I3-19 (INDP) - I3-3 (E1)

LA-GR - W-B

IN

Shift position indicator signal

Power switch on (IG), shift lever in P

0 to 3.2 V

Power switch on (IG), shift lever not in P

11 to 14 V

I3-20 (INDB) - I3-3 (E1)

LA-V - W-B

IN

Shift position indicator signal

Power switch on (IG), shift lever in B

0 to 3.2 V

Power switch on (IG), shift lever not in B

11 to 14 V

I3-21 (INDN) - I3-3 (E1)

LA-SB - W-B

IN

Shift position indicator signal

Power switch on (IG), shift lever in N

0 to 3.2 V

Power switch on (IG), shift lever not in N

11 to 14 V

I3-27 (BATT) - I3-3 (E1)

V - W-B

IN

Constant power source

Always

10 to 14 V

I3-29 (ABFS) - I3-3 (E1)

B - W-B

IN

Airbag activation signal

Power switch on (READY)

Pulse generation

(Waveform 8)

I3-33 (EVSW) - I3-3 (E1)

SB - W-B

IN

EV drive mode switch (combination switch assembly) signal

Power switch on (IG), EV drive mode switch not pushed

11 to 14 V

Power switch on (IG), EV drive mode switch pushed and held

0 to 1.5 V

I3-37 (PDRV) - I3-3 (E1)

R - W-B

IN

Drive mode select switch (combination switch assembly) signal

Power switch on (IG), drive mode select switch not pushed

11 to 14 V

Power switch on (IG), drive mode select switch pushed and held

0 to 1.5 V

I3-44 (IGB) - I3-3 (E1)

Y - W-B

IN

Power source

Power switch on (IG)

11 to 14 V

(a) Oscilloscope waveforms

HINT:

Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering waveforms have been omitted.

(1) Waveform 1 (Communication signal)

Item

Content

Terminal

CH1: A57-4 (HMCH) - I3-3 (E1)

CH2: A57-14 (HMCL) - I3-3 (E1)

Equipment Setting

1 V/DIV., 50 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(2) Waveform 2 (Inverter water pump assembly signal)

Item

Content

Terminal

CH1: A57-34 (IWP) - I3-3 (E1)

CH2: A57-33 (NIWP) - I3-3 (E1)

Equipment Setting

5 V/DIV., 20 ms./DIV.

Condition

Power switch on (READY)

HINT:

The duty of the IWP signal and the frequency of the NIWP signal change according to the coolant (for inverter) temperature.

(3) Waveform 3 (CAN communication signal)

Item

Content

Terminal

CH1: I2-7 (CA3P) - I3-3 (E1)

CH2: I2-20 (CA3N) - I3-3 (E1)

Equipment Setting

1 V/DIV., 50 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(4) Waveform 4 (CAN communication signal)

Item

Content

Terminal

CH1: I2-21 (CA1H) - I3-3 (E1)

CH2: I2-8 (CA1L) - I3-3 (E1)

Equipment Setting

1 V/DIV., 50 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(5) Waveform 5 (System main relay operation signal)

Item

Content

Terminal

CH1: I2-15 (SMRP) - I2-12 (E01)

CH2: I2-16 (SMRB) - I2-12 (E01)

CH3: I2-13 (SMRG) - I2-12 (E01)

Equipment Setting

10 V/DIV., 200 ms./DIV.

Condition

Power switch on (IG) → Power switch on (READY)

(6) Waveform 6 (HV battery blower fan operation signal)

Item

Content

Terminal

I2-38 (SI0) - I3-3 (E1)

Equipment Setting

10 V/DIV., 1 ms./DIV.

Condition

Cooling fans operating

HINT:

The waveform will vary with the operating speed of the battery cooling blower assembly.

(7) Waveform 7 (Communication signal from battery voltage sensor to hybrid vehicle control ECU)

Item

Content

Terminal

CH1: I2-41 (BTH+) - I3-3 (E1)

CH2: I2-42 (BTH-) - I3-3 (E1)

Equipment Setting

2 V/DIV., 500 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(8) Waveform 8 (Airbag activation signal)

Item

Content

Terminal

I3-29 (ABFS) - I3-3 (E1)

Equipment Setting

5 V/DIV., 125 ms./DIV.

Condition

Power switch on (READY)

BATTERY VOLTAGE SENSOR

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Input/Output

Condition

Specified Condition

z10-1 (TC0) - z10-7 (GC0)

G - G

Intake air temperature sensor

Input

Power switch on (IG), HV battery intake air temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

z10-2 (TB2) - z10-8 (GB2)

R - R

Battery temperature sensor 2

Input

Power switch on (IG), HV battery temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

z10-3 (TB1) - z10-9 (GB1)

W - W

Battery temperature sensor 1

Input

Power switch on (IG), HV battery temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

z10-4 (TB0) - z10-10 (GB0)

L - L

Battery temperature sensor 0

Input

Power switch on (IG), HV battery temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

z10-5 (IB0) - z10-12 (GIB)

Y - B

Battery current sensor

Input

Power switch on (READY)

0.5 to 4.5 V

z10-6 (VIB) - z10-12 (GIB)

BR - B

Power source for battery current sensor

Output

Power switch on (IG)

4.5 to 5.5 V

O33-1 (IGCT) - O33-5 (GND)

BR - W-B

Control signal

Input

Power switch on (READY)

11 to 15.5 V

O33-2 (BTH+) - O33-5 (GND)

GR - W-B

Serial communication

Output

Power switch on (IG)

Pulse generation

(waveform 1)

O33-3 (BTH-) - O33-5 (GND)

LG - W-B

Serial communication

Output

Power switch on (IG)

Pulse generation

(waveform 2)

O33-5 (GND) - Body ground

W-B - Body ground

Ground

-

Always (continuity check)

Below 1 Ω

O33-8 (FP0) - O33-5 (GND)

B - W-B

Battery cooling blower No. 0 monitor signal

Input

Battery cooling blower stopped

0 Hz

Battery cooling blower activated

Pulse generation

(waveform 3)

(a) Oscilloscope waveforms

HINT:

Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering waveforms have been omitted.

(1) Waveform 1 (Serial communication)

Item

Content

Terminal

O33-2 (BTH+) - O33-5 (GND)

Equipment Setting

2 V/DIV., 500 μs/DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(2) Waveform 2 (Serial communication)

Item

Content

Terminal

O33-3 (BTH-) - O33-5 (GND)

Equipment Setting

2 V/DIV., 500 μs/DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(3) Waveform 3 (Battery cooling blower No. 0 monitor signal)

Item

Content

Terminal

O33-8 (FP0) - O33-5 (GND)

Equipment Setting

2 V/DIV., 2 ms/DIV.

Condition

Battery cooling blower assembly (No. 0) operating (Active Test of cooling fan being performed)

HINT:

The frequency of the waveform will vary with the operating speed of the battery cooling blower assembly (No. 0).