Last Modified: 06-05-2026 6.11:8.1.0 Doc ID: RM100000001CVEC
Model Year Start: 2019 Model: Corolla Hatchback Prod Date Range: [06/2018 - 01/2019]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): TERMINALS OF ECU; 2019 MY Corolla Hatchback [06/2018 - 01/2019]

TERMINALS OF ECU

HINT:

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

1. 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

Sound signal (Front right)

Audio system playing

A waveform synchronized with sound signals is output

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

LA-Y - W-B

Sound signal (Front left)

Audio system playing

A waveform synchronized with sound signals is output

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

V - W-B

Sound signal (Rear left)

Audio system playing

A waveform synchronized with sound signals is output

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

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

Sound signal (Front right)

Audio system playing

A waveform synchronized with sound signals is output

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

LA-B - W-B

Sound signal (Front left)

Audio system playing

A waveform synchronized with sound signals is output

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

P - W-B

Sound signal (Rear left)

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

Power source (+B)

Always

11 to 14 V

I55-10 (AGND) - Body ground

Shield - Body ground

Shield ground

Always

Below 1 V

I55-11 (VAL+) - I55-13 (VA-)

B - R

Sound signal (Left)

External device playing (When No. 1 stereo jack adapter assembly used)

A waveform synchronized with sound signals is output

I55-12 (VAR+) - I55-13 (VA-)

W - R

Sound signal (Right)

External device playing (When No. 1 stereo jack adapter assembly used)

A waveform synchronized with sound signals is output

I55-13 (VA-) - I55-1 (GND1)

R - W-B

Ground

Always

Below 1 V

I55-14 (ADPG) - I55-1 (GND1)

L - W-B

External device connection detection signal

External device connected

1.1 to 1.9 V

External device not connected

2.1 to 3 V

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

B - W-B

Power source (ACC)

Engine switch off

Below 1 V

Engine switch on (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

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

V - W-B

Vehicle speed signal

See "Check Vehicle Signal" in Operation Check

Click here 2019 MY Corolla Hatchback [06/2018 - 01/2019]; 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 2019 MY Corolla Hatchback [06/2018 - 01/2019]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

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

LG - W-B

Mute signal

Audio system playing

Above 2.0 V

Emergency call mode

Below 1 V

I56-5 (CNH1)*3

L

Local bus communication signal

-

-

I56-6 (CNL1)*3

Y

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

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

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

Power source (IG)

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

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

LG - W-B

Parking brake signal

See "Check Vehicle Signal" in Operation Check

Click here 2019 MY Corolla Hatchback [06/2018 - 01/2019]; 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 2019 MY Corolla Hatchback [06/2018 - 01/2019]; 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 2019 MY Corolla Hatchback [06/2018 - 01/2019]; 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

Engine switch off

Below 1 V

Engine switch on (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

I115-1 (USV1)

-

Power source

-

-

I115-2 (US1-)

-

Data signal

-

-

I115-3 (US1+)

-

Data signal

-

-

I115-4 (UGD1)

-

Ground

-

-

I115-5 (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

Engine switch off

Below 1 V

Engine switch on (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

Engine switch on (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: w/Audio Tab Function for Combination Meter Assembly

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

Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 09/2019]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): TERMINALS OF ECU

3. COMBINATION METER ASSEMBLY

Click here 2019 MY Corolla Hatchback [06/2018 - 01/2019]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): TERMINALS OF ECU

4. SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

Click here 2019 MY Corolla Hatchback [06/2018 - 01/2019]; PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for Gasoline Model): TERMINALS OF ECU

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

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