Toyota 4Runner manuals

Toyota 4Runner: Terminals Of Ecu

TERMINALS OF ECU

1. COMBINATION METER ASSEMBLY


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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

1 (CANH) - Body ground

L - Body ground

CAN communication signal

Ignition switch off

200 Ω or higher

2 (CANL) - Body ground

W - Body ground

CAN communication signal

Ignition switch off

200 Ω or higher

3 (MSSL) - Body ground

P - Body ground

Steering pad switch assembly (DISP switch) signal

Ignition switch to ON, DISP switch not pressed

4 to 5 V

Ignition switch to ON, DISP switch pressed

Below 1 V

6 (LINT) - Body ground*1

LG - Body ground

LIN (Drive monitor switch communication)

Ignition switch ON

Pulse generation

7 (RR) - Body ground*2

Y - Body ground

No. 1 Ultrasonic sensor (for rear corner RH)

Clearance warning indication for rear corner RH is displayed

Below 3 V

8 (S) - Body ground

V - Body ground

Oil pressure switch signal

Ignition switch ON, oil pressure warning light off

11 to 14 V

Ignition switch ON, oil pressure warning light on

Below 1 V

9 (TIRE) - Body ground

G - Body ground

Tire pressure warning light signal

Ignition switch ON, tire pressure warning light off

11 to 14 V

Ignition switch ON, tire pressure warning light blinking

Below 1 V

10 (IL2-) - Body ground

GR - Body ground

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

Pulse generation

11 (ILL-) - Body ground

GR - Body ground

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

Pulse generation

12 (RL) - Body ground*2

GR - Body ground

No. 1 Ultrasonic sensor (for rear corner LH)

Clearance warning indication for rear corner LH is displayed

Below 3 V

13 (MGND) - Body ground

W-B - Body ground

Ground (Signal ground)

Always

Below 1 V

14 (SW) - Body ground*7

V - Body ground

Brake fluid level warning switch signal

Ignition switch ON, brake fluid level warning light on

Below 1 V

Ignition switch ON, brake fluid level warning light off

11 to 14 V

15 (B) - Body ground

L - Body ground

Battery

Always

11 to 14 V

17 (IG+) - Body ground

R - Body ground

Ignition switch signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

18 (BK) - Body ground*2

SB - Body ground

No. 1 Ultrasonic sensor (for rear corner LH and RH)

Clearance warning indication for back right and left sensor are displayed

Below 3 V

19 (E3) - Body ground

B - Body ground

Ground (Fuel ground)

Always

Below 1 V

20 (E1) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

21 (STP+) - Body ground*3

G - Body ground

Automatic Running Boards warning light signal

Automatic Running Boards warning light on or blinking

11 to 14 V

Automatic Running Boards warning light off

Below 1 V

22 (STPA) - Body ground*3

W - Body ground

Ground

Automatic Running Boards warning light off

11 to 14 V

Ignition switch ON, automatic running boards warning light on

Below 1 V

23 (MSCH) - Body ground*4

LG - Body ground

CAN communication signal

Ignition switch off

200 Ω or higher

24 (MSCL) - Body ground*4

W - Body ground

CAN communication signal

Ignition switch off

200 Ω or higher

25 (B) - Body ground

SB - Body ground

Turn indicator light signal

Ignition switch ON, turn RH indicator light off

Below 1 V

Ignition switch ON, turn RH indicator light blinking

11 to 14 V

26 (CHG-) - Body ground

P - Body ground

Charge warning light signal

Ignition switch ON, charge warning light off

11 to 14 V

Ignition switch ON, charge warning light on

Below 1 V

27 (WLVL) - Body ground*5

R - Body ground

Washer level warning switch signal

Ignition switch ON, washer level warning light off

11 to 14 V

Ignition switch ON, washer level warning light on

Below 1 V

28 (+S) - Body ground

SB - Body ground

Speed signal for other systems (Output)

Driving at approx. 20 km/h (12 mph)

Pulse generation (See waveform 1)

29 (SI) - Body ground

G - Body ground

Speed signal for other systems (Input)

Driving at approx. 20 km/h (12 mph)

Pulse generation (See waveform 1)

30 (CHK) - Body ground

L - Body ground

MIL (Check engine warning light) signal

Ignition switch ON, MIL (Check engine warning light) off

11 to 14 V

Ignition switch ON, MIL (Check engine warning light) on

Below 1 V

31 (OP) - Body ground*2

LG - Body ground

Clearance warning ECU signal

Clearance warning indication is displayed

Below 3 V

32 (FL) - Body ground*2

P - Body ground

No. 1 Ultrasonic sensor (for front corner LH)

Clearance warning indication for front corner LH is displayed

Below 3 V

33 (B) - Body ground

Y - Body ground

Turn indicator light signal

Ignition switch ON, turn LH indicator light off

Below 1 V

Ignition switch ON, turn LH indicator light blinking

11 to 14 V

35 (FR) - Body ground*2

B - Body ground

No. 1 Ultrasonic sensor (for front corner RH)

Clearance warning indication for front corner RH is displayed

Below 3 V

36 (TC) - Body ground*6

W - Body ground

TAIL cancel switch signal

TAIL cancel switch off

1 MΩ or higher

TAIL cancel switch on

Below 1 Ω

37 (RHIG) - Body ground*6

B - Body ground

Power source for light control rheostat

Ignition switch ON

4.6 to 5.4 V

38 (TR) - Body ground*6

GR - Body ground

Light control rheostat signal

Light control rheostat dial fully turned downward

Below 1 Ω

Light control rheostat dial fully turned upward

8 to 12 kΩ

39 (E2) - Body ground*6

LG - Body ground

Light control rheostat switch ground

Always

Below 1 Ω

40 (L) - Body ground

W - Body ground

Fuel level signal

Ignition switch ON, fuel level warning light off

Below 4 V

Ignition switch ON, fuel level warning light on

4 to 9 V

  • *1: w/ CRAWL Control
  • *2: w/ Intuitive Parking Assist System
  • *3: w/ Automatic Running Board System
  • *4: w/ Seat Position Memory
  • *5: w/ Level Warning Switch Assembly
  • *6: w/ Light Control Rheostat
  • *7: for 2WD

(b) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item

Condition

Tool setting

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

Vehicle condition

Driving at approx. 20 km/h (12 mph)

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.

2. ACCESSORY METER ASSEMBLY


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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G36-1 (B) - Body ground

L - Body ground

Battery

Always

11 to 14 V

G36-2 (ACC) - Body ground

P - Body ground

Ignition switch signal

Ignition switch off

Below 1 V

Ignition switch ACC

11 to 14 V

G36-3 (ILL+) - Body ground

G - Body ground

Illumination signal

Light control switch in tail or head position

11 to 14 V

G36-7 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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