AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022

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)

Terminal Description

Condition

Specified Condition

I184-1 (FR+) - I184-7 (GND1)

Sound signal (Front right)

Audio system playing

A waveform synchronized with sound signals is output

I184-2 (FL+) - I184-7 (GND1)

Sound signal (Front left)

Audio system playing

A waveform synchronized with sound signals is output

I184-3 (ACC1) - I184-7 (GND1)

Power source (ACC)

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

I184-4 (+B1) - I184-7 (GND1)

Power source (+B)

Ignition switch off

11 to 14 V

I184-5 (FR-) - I184-7 (GND1)

Sound signal (Front right)

Audio system playing

A waveform synchronized with sound signals is output

I184-6 (FL-) - I184-7 (GND1)

Sound signal (Front left)

Audio system playing

A waveform synchronized with sound signals is output

I184-7 (GND1) - Body ground

Ground

Always

Below 1 V

I184-9 (+B) - I184-7 (GND1)

No.1 stereo jack adapter assembly power source

Ignition switch off

11 to 14 V

I184-10 (ILL+) - I184-7 (GND1)

Illumination signal

Light control switch in off position

Below 1 V

Ignition switch off

Light control switch in tail or head position

11 to 14 V

I186-1 (RR+) - I184-7 (GND1)

Sound signal (Rear right)

Audio system playing

A waveform synchronized with sound signals is output

I186-2 (RL+) - I184-7 (GND1)

Sound signal (Rear left)

Audio system playing

A waveform synchronized with sound signals is output

I186-3 (RR-) - I184-7 (GND1)

Sound signal (Rear right)

Audio system playing

A waveform synchronized with sound signals is output

I186-4 (GND2) - Body ground

Ground

Always

Below 1 Ω

I186-5 (ILL-) - I184-7 (GND1)

Illumination signal

Light control switch in off position

Below 1 V

Light control switch in tail or head position

Ignition switch off

Pulse generation

I186-6 (RL-) - I184-7 (GND1)

Sound signal (Rear left)

Audio system playing

A waveform synchronized with sound signals is output

I185-1 (IG) - I184-7 (GND1)

Power source (IG)

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

I185-2 (REV) - I184-7 (GND1)

Reverse signal

See "Check Vehicle Signal" in Operation Check

Click here

I185-4 (MACC) - I184-7 (GND1)

Microphone power supply

Ignition switch off

Below 1 V

Ignition switch ACC

4 to 6 V

I185-5 (MIN+) - I184-7 (GND1)

Microphone voice signal

See "Check Microphone" in Operation Check

Click here

I185-6 (SNS) - I184-7 (GND1)

Microphone connection detection signal

Microphone connection detection signal line connected

Below 1 V

Microphone connection detection signal line disconnected

2.5 to 3.3 V

I185-8 (ADPG) - I184-7 (GND1)

No. 1 stereo jack adapter assembly detection signal

No. 1 stereo jack adapter assembly disconnected → No. 1 stereo jack adapter assembly connected

3.3 V or higher→ Below 2.15 V

I185-9 (CANH)

CAN communication signal

I185-10 (CANL)

CAN communication signal

I185-12 (CSWA) - I184-7 (GND1)

Camera image change signal

Ignition switch ON, shift position not in R → in R

4 V or higher → 2 V or less → 4 V or higher

I185-13 (CA+) - I185-27 (CGND)

Rear television camera assembly power supply

Ignition switch ACC

5.5 to 7.05 V

I185-14 (V+) - F3-28 (V-)

Video signal

Engine switch on (IG)

Shift position in R

Camera lens not covered, displaying image

Pulse generation

(Refer to waveform 1)

Engine switch on (IG)

Shift position in R

Camera lens covered, blacking out screen

Pulse generation

(Refer to waveform 2)

I185-15 (PKB) - I184-7 (GND1)

Parking brake signal

See "Check Vehicle Signal" in Operation Check

Click here

I185-17 (SPD) - I184-7 (GND1)

Vehicle speed signal

See "Check Vehicle Signal" in Operation Check

Click here

I185-18 (SGND) - Body ground

Shield ground

Always

Below 1 V

I185-19 (MIN-) - I184-7 (GND1)

Microphone voice signal

See "Check Microphone" in Operation Check

Click here

I185-21 (SW1) - I185-23 (SWG)

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

I185-22 (SW2) - I185-23 (SWG)

Steering pad switch signal

No switch pushed

2.97 to 3.56 V

MODE switch pushed

0.27 to 0.35 V

On hook switch pushed

0.5 to 0.9 V

Off hook switch pushed

1.0 to 1.7 V

Voice switch pushed

1.51 to 1.79 V

I185-23 (SWG) - I184-7 (GND1)

Steering pad switch ground

Always

Below 1 V

I185-26 (CSLD) - Body ground

Shield ground

Always

Below 1 Ω

I185-27 (CGND) - Body ground

Camera ground

Always

Below 1 Ω

I185-28 (V-) - I184-7 (GND1)

Ground

Always

Below 1 V

x5-1 (USV1)

Power source

x5-2 (US1-)

Data signal

x5-3 (US1+)

Data signal

x5-4 (UGD1)

Ground

x5-5 (USG1)

Shield ground

RA-1 (ANT+) - I184-7 (GND1)

Power source of antenna

Ignition switch ACC

Radio switch on and FM or AM selected

11 to 14 V

(a) Reference (Oscilloscope waveform):

(1) Waveform 1 (camera lens not covered, displaying an image)

Item

Content

Measurement terminal

I185-14 (V+) - I185-28 (V-)

Measurement setting

200 mV/DIV., 50 μs/DIV.

Condition

Ignition switch ON, shift lever in R

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.
The video waveform is constantly output when the ignition switch ACC.

Waveform 1 (camera lens not covered, displaying an image)

Waveform 2 (camera lens covered, blacking out the screen)

Synchronization Signal

Video Waveform

(2) Waveform 2 (camera lens covered, blacking out the screen)

Item

Content

Measurement terminal

I185-14 (V+) - I185-28 (V-)

Measurement setting

200 mV/DIV., 50 μs/DIV.

Condition

Ignition switch ON, shift lever in R

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.
The video waveform is constantly output when the ignition switch ACC.