Lexus NX: Terminals Of Ecu

I183-1 (+B) - I183-20 (E)

Y - W-B

Power source (+B)

Power switch off

11 to 14 V

I183-3 (SIG-) - I183-20 (E)

G - W-B

Ground

Always

Below 1 V

I183-4 (IND1) - I183-20 (E)

LG - W-B

Manual (SOS) switch red indicator illumination signal

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

1 to 8.5 V

Power switch off

Below 1 V

I183-5 (MCVD) - I183-20 (E)

B - W-B

Telephone microphone assembly power supply

Power switch on (IG)

4 to 6 V

Power switch off

Below 1 V

I183-6 (MCI+) - I183-20 (E)

W - W-B

Receive microphone voice signal

Voice being input to telephone microphone assembly

A waveform synchronized with microphone voice signal is input

I183-7 (MCI-) - I183-20 (E)

R - W-B

Receive microphone voice signal

Always

Below 1 V

I183-13 (GSW) - I183-20 (E)

BE - W-B

Collision detection signal

Power switch on (IG)

Pulse generation (Refer to waveform 1)

I183-14 (MUTE) - I183-20 (E)

B - W-B

MUTE Signal

Audio system playing

3.5 V or higher

Emergency call mode

Below 1 V

I183-15 (USBV) - I183-20 (E)

G - W-B

DCM (telematics transceiver) power supply signal

Power switch on (IG)

4.75 to 5.25 V

Power switch off

Below 1 V

I183-16 (MCO+) - I183-20 (E)

G - W-B

Microphone voice signal

Voice being input to telephone microphone assembly

A waveform synchronized with microphone voice signal is input

I183-17 (VOT+) - I183-20 (E)

R - W-B

Sent voice signal

Calling while using the operator service

A waveform synchronized with the received voice is output

I183-18 (VOR+) - I183-20 (E)

B - W-B

Receive voice signal

Receiving a call while using the operator service

A waveform synchronized with the sent voice is output

I183-19 (IG2) - I183-20 (E)

R - W-B

Power source (IG)

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

I183-20 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

I183-21 (SIG1) - I183-3 (SIG-)

V - G

Manual (SOS) switch button condition signal

Manual (SOS) switch not pressed

1.3 to 1.9 V

Manual (SOS) switch pressed

0.5 to 0.8 V

I183-22 (IND2) - I183-20 (E)

L - W-B

Manual (SOS) switch green indicator illumination signal

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

1 to 8.5 V

Power switch off

Below 1 V

I183-23 (SGND) - I183-20 (E)

Shielded - W-B

Shield ground

Always

Below 1 Ω

I183-25 (CANP)

Y

CAN communication signal

-

-

I183-26 (CANN)

W

CAN communication signal

-

-

I183-31 (USBG) - Body ground

P - Body ground

Shield ground

Always

Below 1 Ω

I183-32 (MCO-) - I183-20 (E)

R - W-B

Microphone voice signal

Always

Below 1 V

I183-33 (VOT-) - I183-20 (E)

G - W-B

Sent voice signal

Calling while using the operator service

A waveform synchronized with the received voice is output

I183-34 (VOR-) - I183-20 (E)

W - W-B

Receive voice signal

Receiving a call while using the operator service

A waveform synchronized with the sent voice is output

I184-1 (SPI+) - I183-20 (E)

P - W-B*1

W - W-B*2

Sound signal

Audio system playing

A waveform synchronized with sound signals is output

I184-2 (SPI-) - I183-20 (E)

R - W-B

Sound signal

Audio system playing

A waveform synchronized with sound signals is output

I184-3 (SPO+) - I183-20 (E)

Y - W-B*1

R - W-B*2

Sound signal

Audio system playing, or emergency call mode

A waveform synchronized with sound signals is output

I184-4 (SPO-) - I183-20 (E)

B - W-B*1

W - W-B*2

Sound signal

Audio system playing, or emergency call mode

A waveform synchronized with sound signals is output

I185-1 (USB-)

#

USB communication line

-

-

I185-2 (USB+)

#

USB communication line

-

-

I185-3 (USBS) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 Ω

Tester connection

I183-13 (GSW) - I183-20 (E)

Tool setting

5.0 V/DIV., 20 ms./DIV.

Vehicle condition

Power switch on (IG)