Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001LF5E
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [09/2019 - 04/2020]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Sedan, Gasoline Model): TERMINALS OF ECU; 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]

TERMINALS OF ECU

CHECK DCM (TELEMATICS TRANSCEIVER)

*a

Connector Color: Natural (to Telephone Sub Antenna)

*b

Connector Color: Gray (to GPS Antenna)

*c

Connector Color: Blue (to Telephone Main Antenna)

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-

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

I72-1 (+B) - I72-4 (E)

SB - W-B

Battery power supply

Always

11 to 14 V

I72-2 (SPI+) - I72-4 (E)

P*3, LA-G*4 - W-B

Sound signal

Audio system playing

A waveform synchronized with sound is output

I72-3 (SPI-) - I72-4 (E)

BR*3, LA-L*4 - W-B

Sound signal

Audio system playing

A waveform synchronized with sound is output

I72-4 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

I72-5 (SPO+) - I72-4 (E)

G*3, LA-LG*4 - W-B

Sound signal

Audio system playing, or Emergency call mode

A waveform synchronized with sound is output

I72-6 (SPO-) - I72-4 (E)

B*3, LA-L*4 - W-B

Sound signal

Audio system playing, or Emergency call mode

A waveform synchronized with sound is output

I72-7 (IG2) - I72-4 (E)

BR - W-B

IG power supply

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

I72-8 (ACC) - I72-4 (E)

GR - W-B

ACC power supply

Engine switch on (ACC)

11 to 14 V

Engine switch off

Below 1 V

I72-9 (SLED) - I72-4 (E)

W - W-B

Manual (SOS) switch illumination power supply

Engine switch on (ACC)

11 to 14 V

Engine switch off

Below 1 V

I72-11 (IND1) - I72-4 (E)

G - W-B

Manual (SOS) switch red indicator illumination signal

For 2 seconds after turning the engine switch on (IG)

1 to 8.5 V

Engine switch off

Below 1 V

I72-12 (IND2) - I72-4 (E)

GR - W-B

Manual (SOS) switch green indicator illumination signal

For 2 seconds after turning the engine switch on (IG)

1 to 8.5 V

Engine switch off

Below 1 V

I72-15 (CANP)

L

CAN communication signal

-

-

I72-16 (CANN)

W

CAN communication signal

-

-

I72-17 (MUTE) - I72-4 (E)

L*3, LG*4 - W-B

Mute signal

Audio system playing

3.5 V or higher

Emergency call mode

Below 1 V

I72-18 (MCO+) - I72-4 (E)*1

B - W-B

Sent microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I72-18 (MCO+) - I72-4 (E)*2

B - W-B

Sent microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: OPERATION CHECK

-

I72-19 (MCO-) - I72-4 (E)*1

W - W-B

Sent microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I72-19 (MCO-) - I72-4 (E)*2

W - W-B

Sent microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: OPERATION CHECK

-

I72-24 (GSW) - I72-4 (E)

W - W-B

Collision detection signal

Engine switch on (IG)

Pulse generation

(Refer to waveform 1)

I72-26 (SIG-) - I72-4 (E)

W - W-B

Ground

Always

Below 1 V

I72-27 (SIG1) - I72-4 (E)

L - W-B

Manual (SOS) switch condition signal

Manual (SOS) switch not pressed

1.5 to 2.0 V

Manual (SOS) switch pressed

0.5 to 0.8 V

I72-32 (SGND) - I72-4 (E)

Shield - W-B

Shield ground

Always

Below 1 V

I72-33 (MCVD) - I72-4 (E)

R - W-B

Telephone microphone assembly power supply

Engine switch off

Below 1 V

Engine switch on (ACC)

4 to 6 V

I72-34 (MCI+) - I72-4 (E)*1

B - W-B

Receive microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

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I72-34 (MCI+) - I72-4 (E)*2

B - W-B

Receive microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: OPERATION CHECK

-

I72-35 (MCI-) - I72-4 (E)*1

W - W-B

Receive microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): OPERATION CHECK

-

I72-35 (MCI-) - I72-4 (E)*2

W- W-B

Receive microphone voice signal

See "Check Microphone"

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: OPERATION CHECK

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  • *1: w/o Navigation System
  • *2: w/ Navigation System
  • *3: for 8 Speakers
  • *4: for 6 Speakers

(a) Oscilloscope waveform:

*a

Waveform 1

(1) Waveform 1

Item

Condition

Tester connection

I72-24 (GSW) - I72-4 (E)

Tool setting

5.0 V/DIV., 20 ms/DIV.

Vehicle condition

Engine switch on (IG)

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

w/o Navigation System: Click here 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): TERMINALS OF ECU

w/ Navigation System: Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: TERMINALS OF ECU