Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N24I
Model Year Start: 2021 Model: GR Corolla Prod Date Range: [04/2020 - 06/2021]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): TERMINALS OF ECU; 2021 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 06/2021]

TERMINALS OF ECU

HINT:

Check from the rear of the connector while it is connected to the components.

RADIO AND DISPLAY RECEIVER ASSEMBLY

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

I71-1 (FR+) - I55-1 (GND1)

LA-G - W-B*1

LA-Y - W-B*2

G - W-B*4

Sound signal (Front right)*3

Sound signal (Right)*4

Audio system playing

A waveform synchronized with sound signals is output

I71-2 (FL+) - I55-1 (GND1)

LA-Y - W-B*3

W - W-B*4

Sound signal (Front left)*3

Sound signal (Left)*4

Audio system playing

A waveform synchronized with sound signals is output

I71-3 (RL+) - I55-1 (GND1)

V - W-B*3

L - W-B*4

Sound signal (Rear left)*3

Voice signal*4

Audio system playing*3

Voice guidance sounding*4

A waveform synchronized with sound signals is output*3

A waveform synchronized with voice signals is output*4

I71-4 (RR+) - I55-1 (GND1)*3

V - W-B

Sound signal (Rear right)

Audio system playing

A waveform synchronized with sound signals is output

I71-6 (FR-) - I55-1 (GND1)

LA-L - W-B*1

LA-B - W-B*2

R - W-B*4

Sound signal (Front right)*3

Sound signal (Right)*4

Audio system playing

A waveform synchronized with sound signals is output

I71-7 (FL-) - I55-1 (GND1)

LA-B - W-B*3

B - W-B*4

Sound signal (Front left)*3

Sound signal (Left)*4

Audio system playing

A waveform synchronized with sound signals is output

I71-8 (RL-) - I55-1 (GND1)

P - W-B*3

R - W-B*4

Sound signal (Rear left)*3

Voice signal*4

Audio system playing

A waveform synchronized with sound signals is output

I71-9 (RR-) - I55-1 (GND1)

P - W-B

Sound signal (Rear right)

Audio system playing

A waveform synchronized with sound signals is output

I55-1 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

I55-4 (+B1) - I55-1 (GND1)

SB - W-B*5

LA-SB - W-B*6

Power source (+B)

Always

11 to 14 V

I55-5 (TX1+)*4

R

AVC-LAN communication signal

-

-

I55-6 (TX1-)*4

L

AVC-LAN communication signal

-

-

I55-15 (ACC1) - I55-1 (GND1)

B - W-B

Power source (ACC)

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

I55-21 (SW1) - I55-24 (SWG)

L - BR

Steering pad switch signal

No switch pushed

2.97 to 3.56 V

Seek+ switch pushed

0.27 to 0.35 V

Seek- switch pushed

0.86 to 1.03 V

Volume+ switch pushed

1.51 to 1.79 V

Volume- switch pushed

2.22 to 2.66 V

I55-22 (SW2) - I55-24 (SWG)

G - BR

Steering pad switch signal

No switch pushed

2.97 to 3.56 V

MODE switch pushed

0.27 to 0.35 V

Telephone switch pushed

1.51 to 1.79 V

Voice switch pushed

2.22 to 2.66 V

I55-24 (SWG) - I55-1 (GND1)

BR - W-B

Steering pad switch ground

Always

Below 1 V

I55-25 (MUT1) - I55-1 (GND1)*4

LG - W-B

Mute signal

Audio system playing

2.0 V or higher

Audio system changing modes

Below 1 V

I55-27 (SPD) - I55-1 (GND1)

V - W-B*5

BR - W-B*6

Vehicle speed signal

See "Check Vehicle Signal" in Operation Check

Click here 2021 - 2023 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 11/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I55-28 (REV) - I55-1 (GND1)

G - W-B

Reverse signal

See "Check Vehicle Signal" in Operation Check

Click here 2021 - 2023 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 11/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I56-3 (TMUT) - I55-1 (GND1)*1*3

LG - W-B

Mute signal

Audio system playing

Above 2.0 V

Emergency call mode

Below 1 V

I56-5 (CNH1)*9

L*5

P*6

Local bus communication signal

-

-

I56-6 (CNL1)*9

Y*5

BR*6

Local bus communication signal

-

-

I56-13 (CANH)

B

CAN communication signal

-

-

I56-14 (CANL)

W

CAN communication signal

-

-

I56-15 (ILL+) - I55-1 (GND1)

BR - W-B*5

P - W-B*6

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

11 to 14 V

I56-16 (ILL-) - I55-1 (GND1)

W-B - W-B*5

L - W-B*6

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

Pulse generation

I56-19 (IG) - I55-1 (GND1)

R - W-B*5

L - W-B*6

Power source (IG)

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

I56-20 (PKB) - I55-1 (GND1)

LG - W-B*5*8

GR - W-B*6*7

Y - W-B*6*8

Parking brake signal

See "Check Vehicle Signal" in Operation Check

Click here 2021 - 2023 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 11/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I56-21 (MIN+) - I55-1 (GND1)

B - W-B*1

W - W-B*2

Microphone voice signal

See "Check Microphone" in Operation Check

Click here 2021 - 2023 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 11/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I56-22 (MIN-) - I55-1 (GND1)

W - W-B*1

R - W-B *2

Microphone voice signal

See "Check Microphone" in Operation Check

Click here 2021 - 2023 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 11/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I56-23 (MACC) - I55-1 (GND1)*2

B - W-B

Microphone power supply

Ignition switch off

Below 1 V

Ignition switch ACC

4 to 6 V

I56-24 (SGND) - Body ground

Shield - Body ground

Shield ground

Always

Below 1 V

I56-25 (SNS2) - I55-1 (GND1)

BR - W-B

Microphone connection detection signal

Always

Below 1 V

x2-1 (USV1)

-

Power source

-

-

x2-2 (US1-)

-

Data signal

-

-

x2-3 (US1+)

-

Data signal

-

-

x2-4 (UGD1)

-

Ground

-

-

x2-5 (USG1)

-

Shield ground

-

-

t2-1 (USB+)*1

-

Data signal

-

-

t2-2 (USB-)*1

-

Data signal

-

-

t2-3 (USBS)*1

-

Ground

-

-

I57-10 (USBV) - I57-11 (USBG)*1

G - V

DCM (telephone microphone assembly) power supply

Ignition switch off

Below 1 V

Ignition switch ACC

4.75 to 5.25 V

I57-11 (USBG) - Body ground*1

V

Ground

-

-

RA-5 (ANT+) - I55-1 (GND1)

- - W-B

Power source of antenna

Ignition switch ACC

Radio switch on and FM or AM selected

11 to 14 V

  • *1: w/ Manual (SOS) Switch
  • *2: w/o Manual (SOS) Switch
  • *3: for 6 Speakers
  • *4: except 6 Speakers
  • *5: for Hatchback Model
  • *6: for Sedan Model
  • *7: w/o Electric Parking Brake System
  • *8: w/ Electric Parking Brake System
  • *9: w/Audio Tab Function for Combination Meter Assembly

STEREO COMPONENT AMPLIFIER ASSEMBLY (except 6 Speakers)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

I54-1 (+B) - I54-3 (GND)

B - W-B

Power source (+B)

Always

11 to 14 V

I54-3 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

I54-8 (WF2+) - I54-3 (GND)

P - W-B

Sound signal (Woofer)

Audio system playing

A waveform synchronized with sound signals is output

I54-9 (RL+) - I54-3 (GND)

B - W-B

Sound signal (Rear Left)

Audio system playing

A waveform synchronized with sound signals is output

I54-10 (WF1+) - I54-3 (GND)

LG - W-B

Sound signal (Woofer)

Audio system playing

A waveform synchronized with sound signals is output

I54-11 (RR+) - I54-3 (GND)

R - W-B

Sound signal (Rear Right)

Audio system playing

A waveform synchronized with sound signals is output

I54-12 (TWL+) - I54-3 (GND)

P - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

I54-13 (FL+) - I54-3 (GND)

G - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

I54-14 (TWR+) - I54-3 (GND)

P - W-B*1

Y - W-B*2

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

I54-15 (FR+) - I54-3 (GND)

Y - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

I54-23 (WF2-) - I54-3 (GND)

V - W-B

Sound signal (Woofer)

Audio system playing

A waveform synchronized with sound signals is output

I54-24 (RL-) - I54-3 (GND)

G - W-B

Sound signal (Rear Left)

Audio system playing

A waveform synchronized with sound signals is output

I54-25 (WF1-) - I54-3 (GND)

L - W-B

Sound signal (Woofer)

Audio system playing

A waveform synchronized with sound signals is output

I54-26 (RR-) - I54-3 (GND)

W - W-B

Sound signal (Rear Right)

Audio system playing

A waveform synchronized with sound signals is output

I54-27 (TWL-) - I54-3 (GND)

V - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

I54-28 (FL-) - I54-3 (GND)

L - W-B

Sound signal (Front Left)

Audio system playing

A waveform synchronized with sound signals is output

I54-29 (TWR-) - I54-3 (GND)

BR - W-B*1

B - W-B*2

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

I54-30 (FR-) - I54-3 (GND)

B - W-B

Sound signal (Front Right)

Audio system playing

A waveform synchronized with sound signals is output

I68-1 (MUTE) - I54-3 (GND)

LG - W-B

Mute signal

Ignition switch ACC

Audio system playing

2.0 V or higher

Audio system changing modes

Below 1 V

I68-2 (L-) - I54-3 (GND)

B - W-B

Sound signal (Left)

Audio system playing

A waveform synchronized with sound signals is output

I68-3 (L+) - I54-3 (GND)

W - W-B

Sound signal (Left)

Audio system playing

A waveform synchronized with sound signals is output

I68-4 (R-) - I54-3 (GND)

R - W-B

Sound signal (Right)

Audio system playing

A waveform synchronized with sound signals is output

I68-5 (R+) - I54-3 (GND)

G - W-B

Sound signal (Right)

Audio system playing

A waveform synchronized with sound signals is output

I68-6 (SLD) - Body ground

Shield - Body ground

Shield ground

Always

Below 1 V

I68-7 (TX-)

L

AVC-LAN communication signal

-

-

I68-8 (TX+)

R

AVC-LAN communication signal

-

-

I68-11 (SPD) - I54-3 (GND)

W - W-B

Vehicle speed signal

Ignition switch ON

Wheel being rotated

Pulse generation

I68-12 (ACC) - I54-3 (GND)

R - W-B

Power source (ACC)

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

I68-14 (II1-) - I54-3 (GND)

R - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with voice signals is output

I68-15 (II1+) - I54-3 (GND)

L - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with voice signals is output

I68-18 (SLD1) - Body ground

Shield - Body ground

Shield ground

Always

Below 1 V

I68-24 (TMUT) - Body ground*1

L - Body ground

Mute signal

Ignition switch ACC

Audio system playing

2.0 V or higher

Emergency call mode

Below 1 V

  • *1: w/ Manual (SOS) Switch
  • *2: w/o Manual (SOS) Switch

DCM (TELEMATICS TRANSCEIVER) (w/ Manual (SOS) Switch)

Click here 2021 - 2022 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 09/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): TERMINALS OF ECU

COMBINATION METER ASSEMBLY

Click here 2021 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 06/2021]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): TERMINALS OF ECU

SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

Click here 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): TERMINALS OF ECU

HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) (w/ Headup Display System)

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; METER / GAUGE / DISPLAY: HEADUP DISPLAY SYSTEM: TERMINALS OF ECU