Terminals Of Ecu

COMBINATION METER ASSEMBLY

Fig 1: Identifying ECU And E1 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

E1-1 (IG+) - Body ground

O - Body ground

Ignition switch signal

Ignition switch off

Below 1 V

Ignition switch on (IG)

11 to 14 V

E1-2 (B) - Body ground

G - Body ground

Turn indicator light signal

Ignition switch on (IG), turn signal LH indicator light OFF

Below 1 V

Ignition switch on (IG), turn signal LH indicator light ON

11 to 14 V

E1-3 (B) - Body ground

GR - Body ground

Turn indicator light signal

Ignition switch on (IG), turn signal RH indicator light OFF

Below 1 V

Ignition switch on (IG), turn signal RH indicator light ON

11 to 14 V

E1-4 (SW1) - Body ground

B - Body ground

Light control rheostat signal (Tail cancel switch)

Ignition switch on (IG), turn the light control rheostat knob fully downwards (Tail cancel off)

Below 1 V

Ignition switch on (IG), turn the light control knob rheostat fully upwards (Tail cancel on)

4 to 6 V

E1-7 (S) - Body ground

Y - Body ground

Oil pressure warning light signal

Ignition switch on (IG), oil pressure warning light OFF

11 to 14 V

Ignition switch on (IG), oil pressure warning light ON

Below 1.5 V

E1-8 (WLVL) - Body ground

P - Body ground

Washer level warning light signal

Ignition switch on (IG), WASHER warning light OFF

11 to 14 V

Ignition switch on (IG), WASHER warning light ON

Below 1.5 V

E1-9 (+S) - Body ground

LG - Body ground

Speed signal for other system (Output)

Turn the wheel slowly

Pulse generation (See waveform a)

E1-10 (CHK) - Body ground

W - Body ground

MIL (Check engine warning light) signal

Ignition switch on (IG), MIL ON

Below 1 V

Ignition switch on (IG), MIL OFF

11 to 14 V

E1-14 (MSSL) (⁽¹⁾) - Body ground

P - Body ground

Steering pad switch signal

Ignition switch on (IG), DISP switch OFF

4 to 6 V

Ignition switch on (IG), DISP switch ON

Below 1 V

E1-16 (LCL+) (⁽¹⁾) - Body ground

SB - Body ground

Multi-information display signal

Ignition switch off

Below 1 V

Ignition switch on (IG)

11 to 14 V

E1-17 (LCL-) (⁽¹⁾) - Body ground

G - Body ground

Multi-information display signal

Ignition switch off

Below 1 V

Ignition switch on (IG)

11 to 14 V

E1-18 (E3) - Body Ground

W-B - Body ground

Ground

Always

Below 1 V

E1-19 (FE) - Body ground

W-B - Body ground

Ground (Fuel ground)

Always

Below 1 V

E1-20 (ES) - Body ground

R - Body ground

Ground (Signal ground)

Always

Below 1 V

E1-21 (B) - Body ground

SB - Body ground

Battery

Always

11 to 14 V

E1-22 (B2) - Body ground

BR - Body ground

Battery

Always

11 to 14 V

E1-23 (TC) - Body ground

R - Body ground

Light control rheostat signal (Tail cancel switch)

Ignition switch on (IG), turn the light control rheostat knob fully downwards

4 to 6 V

Ignition switch on (IG), turn the light control rheostat knob fully upwards

Below 1 V

E1-24 (SW2) - Body ground

BR - Body ground

Light control rheostat signal

Ignition switch on (IG), rheostat knob position is on MIN.

Below 1 V

Ignition switch on (IG), rheostat knob position is on MAX.

4 to 6 V

E1-25 (CANH) - Body ground

P - Body ground

CAN communication line

Ignition switch off

200 Ω or higher

E1-26 (CANL) - Body ground

W - Body ground

CAN communication line

Ignition switch off

200 Ω or higher

E1-28 (B/LE) - Body ground

SB - Body ground

Brake fluid level warning light signal

Ignition switch on (IG), BRAKE warning light OFF

11 to 14 V

Ignition switch on (IG), BRAKE warning light ON

Below 1.5 V

E1-29 (SI) - Body ground

BR - Body ground

Speed signal for other system (Input)

Ignition switch on (IG), turn the wheel slowly.

Pulse generation (See waveform a)

E1-30 (ILL-) - Body ground

R - Body ground

Illumination signal

Ignition switch on (IG), light control switch is in the HEAD/TAIL position.

11 to 14 V

E1-31 (PBLT) - Body ground

BR - Body ground

Passenger seat belt warning light signal

Sit on the passenger seat, ignition switch on (IG), passenger seat belt warning light OFF

11 to 14 V

Sit on the passenger seat, ignition switch on (IG), front passenger side seat belt warning light is blinking.

Below 1 V

E1-32 (CHG-) - Body ground

V - Body ground

Charge warning light signal

Ignition switch on (IG), charge warning light ON

Below 1.5 V

Ignition switch on (IG), charge warning light OFF

11 to 14 V

E1-33 (TIRE) (⁽²⁾) - Body ground

Y - Body ground

Tire pressure warning signal

Ignition switch on (IG), tire pressure warning light ON

8 to 15 V

Ignition switch on (IG), tire pressure warning light OFF

Below 1.5 V

E1-34 (FR) - Body ground

GR - Body ground

Fuel signal

Ignition switch on (IG), fuel level is FULL.

Below 2 V

Ignition switch on (IG), fuel level is EMPTY.

4 to 7 V

E1-36 (MCLK) (⁽¹⁾) - Body ground

R - Body ground

Multi-information display signal

Ignition switch on (IG)

Pulse generation

E1-37 (MDAT) (⁽¹⁾) - Body ground

Y - Body ground

Multi-information display signal

Ignition switch on (IG)

Pulse generation

E1-38 (SYNC) (⁽¹⁾) - Body ground

L - Body ground

Multi-information display signal

Ignition switch on (IG)

Pulse generation

E1-39 (SW3) - Body ground

P - Body ground

Light control rheostat signal

Ignition switch on (IG), rheostat knob position is on MIN.

Below 1 V

Ignition switch on (IG), rheostat knob position is on MAX.

4 to 6 V

E1-40 (E2) - Body ground

W - Body ground

Ground (Power ground)

Always

Below 1 V

⁽¹⁾	w/ Multi-information Display

⁽²⁾	w/ Tire Pressure Warning System

Waveform (Reference): Using oscilloscope:

ITEM CONDITION REFERENCE CHART

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.

Fig 2: Waveform Graph

COMBINATION METER ASSEMBLY INNER CIRCUIT

Combination Meter Assembly Inner Circuit

Fig 3: Combination Meter Assembly Inner Circuit Diagram (1 Of 3)

Fig 4: Combination Meter Assembly Inner Circuit Diagram (2 Of 3)

Fig 5: Combination Meter Assembly Inner Circuit Diagram (3 Of 3)

TERMINAL SYMBOL REFERENCE CHART

Terminal No. (Symbol)

Wire Harness Side

1 (IG+)

Gauge No. 2 Fuse

2 (B)

Turn Signal Flasher

3 (B)

Turn Signal Flasher

4 (SW1)

Light Control Rheostat

7 (S)

Oil Pressure Switch

8 (WLVL)

Washer Level Warning Switch

9 (+S)

Each part that uses speed signal

10 (CHK)

ECM

14 (MSSL)

Steering Pad Switch (⁽¹⁾)

16 (LCL+)

Clock Assembly (⁽¹⁾)

17 (LCL-)

Clock Assembly (⁽¹⁾)

18 (E3)

Ground

19 (FE)

Fuel Sender Gauge Assembly

20 (ES)

Ground

21 (B)

ECU-B Fuse

22 (B2)

DOME Fuse

23 (TC)

Light Control Rheostat

24 (SW2)

Light Control Rheostat

25 (CANH)

CAN Communication Line

26 (CANL)

CAN Communication Line

28 (B/LE)

Brake Fluid Level Warning Switch

29 (SI)

Skid Control ECU

30 (ILL-)

Each part that uses the illumination signal

31 (PBLT)

Integration Control and Panel Assembly

32 (CHG-)

Generator

33 (TIRE)

Tire Pressure Warning ECU (⁽²⁾)

34 (FR)

Fuel Sender Gauge Assembly

36 (MCLK)

Clock Assembly (⁽¹⁾)

37 (MDAT)

Clock Assembly (⁽¹⁾)

38 (SYNC)

Clock Assembly (⁽¹⁾)

39 (SW3)

Light Control Rheostat

40 (E2)

Ground

⁽¹⁾	w/ Multi-information Display

⁽²⁾	w/ Tire Pressure Warning System