Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. COMBINATION METER ASSEMBLY

(a) Measure the voltage, resistance and check for pulses according to the value(s)

(a) Measure the voltage, resistance and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

C9-1 (CANH) - Body ground

G - Body ground

CAN communication line

-

-

C9-2 (CANL) - Body ground

W - Body ground

CAN communication line

-

-

C9-4 (MSCH) - Body ground

B - Body ground

Local bus communication line

-

-

C9- 5 (MSCL) - Body ground

W - Body ground

Local bus communication line

-

-

C9-7 (EL) - Body ground

V - Body ground

LH turn indicator light signal (Input)

Ignition switch ON, LH turn signal switch off

11 to 14 V

Ignition switch ON, LH turn signal switch on

Below 1 V

C9-8 (ER) - Body ground

GR - Body ground

RH turn indicator light signal (Input)

Ignition switch ON, RH turn signal switch off

11 to 14 V

Ignition switch ON, RH turn signal switch on

Below 1 V

C9-9 (SW) - Body ground

R - Body ground

Turn switch signal

Ignition switch ON, LH and RH turn signal switch off

11 to 14 V

Ignition switch ON, LH or RH turn signal switch on

Below 1 V

C9-11 (BKSW) - Body ground

L - Body ground

Stop light switch signal

Stop light switch on

11 to 14 V

Stop light switch off

Below 1 V

C9-13 (HAZ) - Body ground

Y - Body ground

Hazard warning signal switch signal

Ignition switch ON, hazard warning signal switch not pressed

11 to 14 V

Ignition switch ON, hazard warning signal switch pressed

Below 1 V

C9-15 (ILL-) - Body ground

BE - Body ground

Illumination signal

Headlight dimmer switch off

Below 1 V

Headlight dimmer switch in tail or head position

Pulse generation

C9-17 (EP) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

C9-18 (ES) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

C9-19 (B) - Body ground

P - Body ground

Battery

Always

11 to 14 V

C9-20 (IG+) - Body ground

BE - Body ground

Ignition switch signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

C9-21 (L) - C9-23 (E3)

BE - G

Fuel level signal

Ignition switch ON, fuel level full

Below 1 V

Ignition switch ON, fuel level low (fuel level warning light on)

4.5 to 9 V

C9-25 (S) - Body ground

LG - Body ground

Oil pressure signal

Ignition switch ON, oil pressure warning OFF

11 to 14 V

Ignition switch ON, oil pressure warning ON

Below 1 V

C9-26 (WLVL) - Body ground*1

B - Body ground

Washer fluid level signal

Ignition switch ON, washer fluid level not low

11 to 14 V

Ignition switch ON, washer fluid level low

Below 1 V

C9-28 (SW) - Body ground*2

LG - Body ground

Brake fluid level signal

Ignition switch ON, brake fluid level not low

11 to 14 V

Ignition switch ON, brake fluid level low

Below 1 V

C9-30 (MSM+) - Body ground

P - Body ground

Steering pad switch assembly signal

Ignition switch ON, enter, top and back switches on steering pad switch assembly not pushed

4.8 to 5.2 V

Ignition switch ON, enter, top or back switches on steering pad switch assembly pushed

Below 1 V

C9-32 (MSSL) - Body ground

SB - Body ground

Steering pad switch assembly signal

Ignition switch ON, enter, top and back switches on steering pad switch assembly not pushed

4.8 to 5.2 V

Ignition switch ON, enter, top or back switches on steering pad switch assembly pushed

Below 1 V

C9-34 (MSTI) - Body ground

L - Body ground

Steering pad switch assembly signal

Ignition switch ON, up, down, right, and left switches on steering pad switch assembly not pushed

4.8 to 5.2 V

Ignition switch ON, up, down, right, or left switches on steering pad switch assembly pushed

Below 1 V

C9-36 (OIL) - Body ground*3

W - Body ground

Oil level switch signal

Ignition switch ON, oil level low

11 to 14 V

Ignition switch ON, oil level not low

Below 1 V

C9-37 (VCM) - Body ground*2*3

LG - Body ground

Vacuum switch signal

Ignition switch ON, vacuum pressure not low

11 to 14 V

Ignition switch ON, vacuum pressure low

Below 1 V

C9-39 (SI) - Body ground

G - Body ground

Speed signal for other system (Input)

Ignition switch ON, wheel being rotated

Pulse generation (See waveform 1)

C9-40 (+S) - Body ground

V - Body ground

Speed signal for other system (Output)

Ignition switch ON, wheel being rotated

Pulse generation (See waveform 1)

C10-1 (B) - Body ground

V - Body ground

Battery

Always

11 to 14 V

C10-3 (RRT) - Body ground

L - Body ground

RH turn indicator light signal (Input)

Ignition switch ON, RH turn signal switch off

Below 1 V

Ignition switch ON, RH turn signal switch on

11 to 14 V ←→ Below 1 V

C10-5 (RLT) - Body ground

Y - Body ground

LH turn indicator light signal (Output)

Ignition switch ON, LH turn indicator light off

Below 1 V

Ignition switch ON, LH turn indicator light blinking

11 to 14 V ←→ Below 1 V

C10-9 (LL) - Body ground

BE - Body ground

LH turn indicator light signal (Output)

Ignition switch ON, LH turn indicator light off

Below 1 V

Ignition switch ON, LH turn indicator light blinking

11 to 14 V ←→ Below 1 V

C10-11 (TLT) - Body ground*4

V - Body ground

LH turn indicator light signal (Output)

Ignition switch ON, LH turn indicator light off

Below 1 V

Ignition switch ON, LH turn indicator light blinking

11 to 14 V ←→ Below 1 V

C10-12 (TRT) - Body ground*4

SB - Body ground

RH turn indicator light signal (Output)

Ignition switch ON, RH turn signal switch off

Below 1 V

Ignition switch ON, RH turn signal switch on

11 to 14 V ←→ Below 1 V

C10-13 (B) - Body ground

W - Body ground

Battery

Always

11 to 14 V

C10-10 (LR) - Body ground

SB - Body ground

RH turn indicator light signal (Output)

Ignition switch ON, RH turn indicator light off

Below 1 V

Ignition switch ON, RH turn indicator light blinking

11 to 14 V ←→ Below 1 V

  • *1: Washer Fluid Level Warning
  • *2: for Vacuum Booster Type
  • *3: for 2GR-FKS
  • *4: w/ Trailer Towing System

(1) Waveform 1 (Reference):

Item

Condition

Tool Setting

5 V/DIV., 20 ms./DIV.

Vehicle Condition

Ignition switch ON, wheel being rotated

HINT:

When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

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