Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. NAVIGATION RECEIVER ASSEMBLY

Terminal No. (Symbols)

Wiring Color

Terminal Description

Condition

Specified Condition

N19-3 (ACC2) - N24-7 (GND1)*3

Y - W-B

Power source (ACC)

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

N19-4 (+B2) - N24-7 (GND1)*3

R - W-B

Power source (+B)

Always

11 to 14 V

N19-8 (GND2) - Body ground*3

B - Body ground

Ground

Always

Below 1 V

N22-1 (UPO)

-

Power source

-

-

N22-2 (UDO-)

-

Data signal

-

-

N22-3 (UDO+)

-

Data signal

-

-

N22-4 (UESG)

-

Ground

-

-

N23-1 (RR+) - N24-7 (GND1)*5

L - W-B

Sound signal (Rear)

Audio system playing

A waveform synchronized with sounds is output

N23-2 (RL+) - N24-7 (GND1)*5

W - W-B

Sound signal (Rear)

Audio system playing

A waveform synchronized with sounds is output

N23-3 (RR-) - N24-7 (GND1)*5

LG - W-B

Sound signal (Rear)

Audio system playing

A waveform synchronized with sounds is output

N23-4 (SLD2) - N24-7 (GND1)*1

Shielded - W-B

Shield ground

Always

Below 1 V

N23-5 (ILL-) - N24-7 (GND1)

BE - W-B

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

Pulse generation

N23-6 (RL-) - N24-7 (GND1)*5

B - W-B

Sound signal (Rear)

Audio system playing

A waveform synchronized with sounds is output

N24-1 (FR+) - N24-7 (GND1)

R - W-B*1

LA-R - W-B*2

Sound signal (Right)

Audio system playing

A waveform synchronized with sounds is output

N24-2 (FL+) - N24-7 (GND1)

B - W-B*1

LA-B - W-B*2

Sound signal (Left)

Audio system playing

A waveform synchronized with sounds is output

N24-3 (ACC1) - N24-7 (GND1)

GR - W-B

Power source (ACC)

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

N24-4 (+B1) - N24-7 (GND1)

W - W-B

Power source (+B)

Always

11 to 14 V

N24-5 (FR-) - N24-7 (GND1)

G - W-B*1

LA-G - W-B*2

Sound signal (Right)

Audio system playing

A waveform synchronized with sounds is output

N24-6 (FL-) - N24-7 (GND1)

W - W-B*1

LA-W - W-B*2

Sound signal (Left)

Audio system playing

A waveform synchronized with sounds is output

N24-7 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

N24-10 (ILL+) - N24-7 (GND1)

G - W-B

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

11 to 14 V

N25-1 (IG) - N24-7 (GND1)

LG - W-B

Power source (IG)

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

N25-2 (REV) - N24-7 (GND1)

GR - W-B

Reverse signal

See "Vehicle Signal Check Mode" in Operation Check (See page )

-

N25-4 (MACC) - N24-7 (GND1)

R - W-B

Microphone power supply

Ignition switch off

Below 1 V

Ignition switch ACC

4 to 6 V

N25-5 (MIN+) - N24-7 (GND1)

G - W-B

Microphone voice signal

See "Microphone Level Test" in Operation Check (See page )

-

N25-6 (SNS2) - N24-7 (GND1)

W - W-B

Microphone connection detection signal

Always

Below 1 V

N25-7 (TX1+)*1

BE

AVC-LAN communication signal

-

-

N25-8 (TX1-)*1

P

AVC-LAN communication signal

-

-

N25-11 (AGND) - N24-7 (GND1)

Shielded - W-B

Shield ground

Always

Below 1 V

N25-15 (PKB) - N24-7 (GND1)

Y - W-B

Parking brake signal

See "Vehicle Signal Check Mode" in Operation Check (See page )

-

N25-16 (MUT1) - N24-7 (GND1)*1

SB - W-B

Mute signal

Audio system playing

Above 3.5 V

Audio system changing modes

Below 1 V

N25-17 (SPD) - N24-7 (GND1)

V - W-B

Vehicle speed signal

See "Vehicle Signal Check Mode" in Operation Check (See page )

-

N25-18 (SGND) - N24-7 (GND1)

Shielded - W-B

Shield ground

Always

Below 1 V

N25-19 (MIN-) - N24-7 (GND1)

B - W-B

Microphone voice signal

See "Microphone Level Test" in Operation Check (See page )

-

N25-21 (SW1) - N25-23 (SWG)

V - SB

Steering pad switch signal

No switch pushed

2.97 to 3.56 V

Up switch pushed

0.27 to 0.35 V

Down 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

N25-22 (SW2) - N25-23 (SWG)

Y - SB

Steering pad switch signal

No switch pushed

2.97 to 3.56 V

MODE/HOLD switch pushed

0.27 to 0.35 V

On hook switch pushed

0.86 to 1.03 V

Off hook switch pushed

1.51 to 1.79 V

Voice switch pushed

2.22 to 2.66 V

N25-23 (SWG) - N24-7 (GND1)

SB - W-B

Steering pad switch ground

Always

Below 1 V

N25-25 (ADPG) - N24-7 (GND1)

W-B - W-B

External device connection detection signal

External device connected

Below 1 V

N25-26 (VAR+) - N24-7 (GND1)

W - W-B

Sound signal (Right)

External device playing (When stereo jack used)

A waveform synchronized with sounds is output

N25-27 (VA-) - N24-7 (GND1)

R - W-B

Ground

Always

Below 1 V

N25-28 (VAL+) - N24-7 (GND1)

B - W-B

Sound signal (Left)

External device playing (When stereo jack used)

A waveform synchronized with sounds is output

N26-3 (CNH1)

B

Local bus communication signal

-

-

N26-4 (CNL1)

W

Local bus communication signal

-

-

N26-11 (CA+) - N24-7 (GND1)*4

B - W-B

Power source

Ignition switch ACC

5.5 to 7.05 V

N26-12 (V+) - N26-24 (V-)*4

R - W

Display signal

Ignition switch ON, shift lever in R

Pulse generation (See waveform 1)

Ignition switch ON, shift lever in R, screen blacked out by covering camera lens

Pulse generation (See waveform 2)

N26-23 (CGND) - N24-7 (GND1)*4

Shielded - W-B

Shield ground

Always

Below 1 V

N27-1 (USV4)*3

-

Power source

-

-

N27-2 (US4-)*3

-

Data signal

-

-

N27-3 (US4+)*3

-

Data signal

-

-

N27-4 (UGO4)*3

-

Ground

-

-

N27-5 (USG4)*3

-

Shield ground

-

-

N28-1 (LVDS) - N24-7 (GND1)*3

B - W-B

LVDS communication signal

-

-

RA-5 (ANT+) - N24-7 (GND1)

- - W-B

Power source of antenna

Ignition switch ACC Radio switch on and FM or AM selected

11 to 14 V

  • *1: w/ Stereo Component Amplifier
  • *2: w/o Stereo Component Amplifier
  • *3: w/ SDARS System
  • *4: w/ Rear Television Camera
  • *5: for 6 Speakers

(a) Using an oscilloscope, check the waveform.

(1) Waveform 1

(1) Waveform 1

Measurement Condition

Item

Content

Terminal No. (Symbol)

N26-12 (V+) - N26-24 (V-)

Tool Setting

0.2 V/DIV., 50 μs./DIV.

Condition

Ignition switch ON, shift lever in R

HINT:

The video waveform changes according to the image sent by the television camera assembly.

(2) Waveform 2

Measurement Condition

Item

Content

Terminal No. (Symbol)

N26-12 (V+) - N26-24 (V-)

Tool Setting

0.2 V/DIV., 50 μs./DIV.

Condition

Ignition switch ON, shift lever in R, screen blacked out by covering camera lens

HINT:

The video waveform changes according to the image sent by the television camera assembly.

Text in Illustration

*a

Waveform 1

*b

Waveform 2

*c

Synchronized Signal

*d

Video Waveform

2. STEREO COMPONENT TUNER ASSEMBLY (w/ SDARS System)

Terminal No. (Symbols)

Wiring Color

Terminal Description

Condition

Specified Condition

S52-3 (ACC2) - S52-8 (GND2)

Y - B

Power source (ACC)

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

S52-4 (+B2) - S52-8 (GND2)

R - B

Power source (+B)

Always

11 to 14 V

S52-8 (GND2) - Body ground

B - Body ground

Ground

Always

Below 1 V

S53-1 (USV4)

-

Power source

-

-

S53-2 (US4-)

-

Data signal

-

-

S53-3 (US4+)

-

Data signal

-

-

S53-4 (UGO4)

-

Ground

-

-

S53-5 (USG4)

Shielded

Shield ground

-

-

S54-1 (LVDS)

B

LVDS communication signal

-

-

3. STEREO COMPONENT AMPLIFIER ASSEMBLY (w/ Stereo Component Amplifier)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S23-1 (MUTE) - S24-6 (GND)

SB - W-B

Mute signal

Audio system is playing

Above 3.5 V

Audio system is changing mode

Below 1 V

S23-2 (L-) - S24-6 (GND)

W - W-B

Sound signal (Left)

Audio system is playing

A waveform synchronized with sounds is output

S23-3 (L+) - S24-6 (GND)

B - W-B

Sound signal (Left)

Audio system is playing

A waveform synchronized with sounds is output

S23-4 (R-) - S24-6 (GND)

G - W-B

Sound signal (Right)

Audio system is playing

A waveform synchronized with sounds is output

S23-5 (R+) - S24-6 (GND)

R - W-B

Sound signal (Right)

Audio system is playing

A waveform synchronized with sounds is output

S23-6 (SGND) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 V

S23-7 (TX-)

P

AVC-LAN communication signal

-

-

S23-8 (TX+)

BE

AVC-LAN communication signal

-

-

S23-11 (SPD) - S24-6 (GND)

V - W-B

Vehicle speed signal

Ignition switch ON, drive wheels turned slowly

Pulse generation

S23-12 (ACC) - S24-6 (GND)

GR - W-B

Power source (ACC)

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

S23-22 (INT-) - S24-6 (GND)

B - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with sounds is output

S23-23 (INT+) - S24-6 (GND)

W - W-B

Voice signal

Voice guidance sounding

A waveform synchronized with sounds is output

S24-1 (FL-) - S24-6 (GND)

LG - W-B

Sound signal (Front Left)

Audio system is playing

A waveform synchronized with sounds is output

S24-2 (FL+) - S24-6 (GND)

G - W-B

Sound signal (Front Left)

Audio system is playing

A waveform synchronized with sounds is output

S24-3 (FR-) - S24-6 (GND)

L - W-B

Sound signal (Front Right)

Audio system is playing

A waveform synchronized with sounds is output

S24-4 (WFR+) - S24-6 (GND)

LA-B - W-B

Sound signal (Woofer)

Audio system is playing

A waveform synchronized with sounds is output

S24-5 (WFL+) - S24-6 (GND)

LA-G - W-B

Sound signal (Woofer)

Audio system is playing

A waveform synchronized with sounds is output

S24-6 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

S24-7 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

S24-9 (FR+) - S24-6 (GND)

GR - W-B

Sound signal (Front Right)

Audio system is playing

A waveform synchronized with sounds is output

S24-10 (WFR-) - S24-6 (GND)

LA-R - W-B

Sound signal (Woofer)

Audio system is playing

A waveform synchronized with sounds is output

S24-12 (WFL-) - S24-6 (GND)

LA-Y - W-B

Sound signal (Woofer)

Audio system is playing

A waveform synchronized with sounds is output

S31-1 (+B) - S24-6 (GND)

W - W-B

Power source (+B)

Always

11 to 14 V

S31-2 (TWR+) - S24-6 (GND)

P - W-B

Sound signal (Front Right)

Audio system is playing

A waveform synchronized with sounds is output

S31-3 (RL+) - S24-6 (GND)

W - W-B

Sound signal (Rear Left)

Audio system is playing

A waveform synchronized with sounds is output

S31-4 (RR-) - S24-6 (GND)

LA-LG - W-B

Sound signal (Rear Right)

Audio system is playing

A waveform synchronized with sounds is output

S31-5 (+B2) - S24-6 (GND)

SB - W-B

Power source (+B)

Always

11 to 14 V

S31-6 (TWR-) - S24-6 (GND)

V - W-B

Sound signal (Front Right)

Audio system is playing

A waveform synchronized with sounds is output

S31-7 (TWL-) - S24-6 (GND)

R - W-B

Sound signal (Front Left)

Audio system is playing

A waveform synchronized with sounds is output

S31-8 (TWL+) - S24-6 (GND)

Y - W-B

Sound signal (Front Left)

Audio system is playing

A waveform synchronized with sounds is output

S31-9 (RL-) - S24-6 (GND)

B - W-B

Sound signal (Rear Left)

Audio system is playing

A waveform synchronized with sounds is output

S31-10 (RR+) - S24-6 (GND)

LA-L - W-B

Sound signal (Rear Right)

Audio system is playing

A waveform synchronized with sounds is output

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