Toyota Avalon Service & Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK DCM (TELEMATICS TRANSCEIVER)

*a

Connector Color: Natural (to Telephone Sub Antenna)

*b

Connector Color: Blue (to Telephone Main Antenna)

*c

Connector Color: Gray (to GPS Antenna)

-

-

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G9-1 (+B) - G9-4 (E)

B - W-B

Auxiliary battery power supply

Power switch off

11 to 14 V

G9-2 (SPI+) - G9-4 (E)

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

Sound signal

Audio system playing

A waveform synchronized with sound is output

G9-3 (SPI-) - G9-4 (E)

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

Sound signal

Audio system playing

A waveform synchronized with sound is output

G9-4 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

G9-5 (SPO+) - G9-4 (E)

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

Sound signal

Audio system playing, or Emergency call mode

A waveform synchronized with sound is output

G9-6 (SPO-) - G9-4 (E)

Y*3, LA-R*4 - W-B

Sound signal

Audio system playing, or Emergency call mode

A waveform synchronized with sound is output

G9-7 (IG2) - G9-4 (E)

LG - W-B

IG power supply

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

G9-8 (ACC) - G9-4 (E)

B - W-B

ACC power supply

Power switch on (ACC)

11 to 14 V

Power switch off

Below 1 V

G9-9 (SLED) - G9-4 (E)

SB - W-B

Manual (SOS) switch illumination power supply

Power switch on (ACC)

11 to 14 V

Power switch off

Below 1 V

G9-11 (IND1) - G9-4 (E)

P - 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

G9-12 (IND2) - G9-4 (E)

LG - 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

G9-15 (CANP)

R

CAN communication signal

-

-

G9-16 (CANN)

B

CAN communication signal

-

-

G9-17 (MUTE) - G9-4 (E)

BE - W-B

Mute signal

Audio system playing

3.5 V or higher

Emergency call mode

Below 1 V

G9-18 (MCO+) - G9-4 (E)*1

SB - W-B

Sent microphone voice signal

See "Check Microphone"

-

G9-18 (MCO+) - G9-4 (E)*2

SB - W-B

Sent microphone voice signal

See "Check Microphone"

-

G9-19 (MCO-) - G9-4 (E)*1

V - W-B

Sent microphone voice signal

See "Check Microphone"

-

G9-19 (MCO-) - G9-4 (E)*2

V - W-B

Sent microphone voice signal

See "Check Microphone"

-

G9-24 (GSW) - G9-4 (E)

W - W-B

Collision detection signal

Power switch on (IG)

Pulse generation

(Refer to waveform 1)

G9-26 (SIG-) - G9-4 (E)

GR - W-B

Ground

Always

Below 1 V

G9-27 (SIG1) - G9-4 (E)

B - 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

G9-32 (SGND) - G9-4 (E)

Shield - W-B

Shield ground

Always

Below 1 V

G9-33 (MCVD) - G9-4 (E)

B - W-B

Telephone microphone assembly power supply

Power switch off

Below 1 V

Power switch on (ACC)

4 to 6 V

G9-34 (MCI+) - G9-4 (E)*1

W - W-B

Receive microphone voice signal

See "Check Microphone"

-

G9-34 (MCI+) - G9-4 (E)*2

W - W-B

Receive microphone voice signal

See "Check Microphone"

-

G9-35 (MCI-) - G9-4 (E)*1

R - W-B

Receive microphone voice signal

See "Check Microphone"

-

G9-35 (MCI-) - G9-4 (E)*2

R - W-B

Receive microphone voice signal

See "Check Microphone"

-

  • *1: w/o Navigation System
  • *2: w/ Navigation System
  • *3: for 14 Speakers
  • *4: for 8 Speakers

(a) Oscilloscope waveform:

(1) Waveform 1

Item

Condition

Tester connection

G9-24 (GSW) - G9-4 (E)

Tool setting

5.0 V/DIV., 20 ms/DIV.

Vehicle condition

Power switch on (IG)

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

w/o Navigation System: Click here

w/ Navigation System: Click here

    System Diagram

    Unable To Connect To Call Center

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