Terminals Of Ecu

Combination Meter Assembly

Fig 1: Identifying Combination Meter Assembly ECU Terminals

G05274123

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

POWER GND (C8-1) - Body ground

W-B - Body ground

Ground (Power ground)

Always

Below 1 V

ILL- (C8-2) - Body ground

L - Body ground

Illumination signal

Turn the ignition switch ON, combination switch TAIL

Below 1 V → 10 to 16 V

CHECK ENGINE (C8-4) - Body ground

BR - Body ground

Check engine signal

Turn the ignition switch ON, Check engine warning light OFF → ON

10 to 16 V → Below 1.5 V

MPX+ (C8-5) - Body ground

Y - Body ground

Communication line

-

-

SPEED SIGNAL (4P) (C8-6) - Body ground

LG - Body ground

Speed signal (Output)

Ignition switch ON, turn the wheel slowly

Pulse generation (See a)

IG2 (C8-8) - Body ground

GR - Body ground

Battery

Ignition switch OFF → ON

Below 1 V → 10 to 16 V

TURN R (C8-13) - Body ground

P - Body ground

Turn signal flasher

Ignition switch ON, turn signal RH indicator light OFF → ON

Below 1 V → 10 to 16 V

TURN L (C8-14) - Body ground

B - Body ground

Turn signal flasher

Ignition switch ON, turn signal LH indicator light OFF → ON

Below 1 V → 10 to 16 V

ECU +B (C8-15) - Body ground

SB - Body ground

Battery

Always

10 to 16 V

DOME +B (C8-16) - Body ground

O - Body ground

Battery

Always

10 to 16 V

SIGNAL GND (C9-1) - Body ground

W-B - Body ground

Ground (Signal ground)

Always

Below 1 V

FE (C9-2) - Body ground

SB - Body ground

Ground (Fuel ground)

Always

Below 1 V

MPX- (C9-4) - Body ground

V - Body ground

Communication line

-

-

FUEL LID A PIN (C9-6) - Body ground

R - Body ground

Multi-information display signal

Combination meter displays "PLEASE WAIT NOW OPENING" in the multi-information display

Below 1 V

FUEL LID B PIN (C9-7) - Body ground

P - Body ground

Multi-information display signal

10 to 14 V

FUEL LID A PIN (C9-6) - Body ground

R - Body ground

Multi-information display signal

Combination meter displays "REFUEL READY" in the multi-information display

10 to 14 V

FUEL LID B PIN (C9-7) - Body ground

P - Body ground

Multi-information display signal

10 to 14 V

FUEL LID A PIN (C9-6) - Body ground

R - Body ground

Multi-information display signal

Combination meter displays "CLOSE FUEL LID" in the multi-information display

10 to 14 V

FUEL LID B PIN (C9-7) - Body ground

P - Body ground

Multi-information display signal

Below 1 V

FUEL LID A PIN (C9-6) - Body ground

R - Body ground

Multi-information display signal

Combination meter displays "OFF" in the multi-information display

Below 1 V

FUEL LID B PIN (C9-7) - Body ground

P - Body ground

Multi-information display signal

Below 1 V

POWER METER (C9-8) - Body ground

W - Body ground

Power meter signal

Ignition switch OFF → ON

Pulse generation (See a waveform 1)

MULTI MODE SW (C9-9) - Body ground

Y - Body ground

Multi mode switch signal

Turn the ignition switch ON, multi mode switch OFF → ON

4 to 6V → Below 1 V

H-LP LEVEL (C9-10) - Body ground

B - Body ground

Headlight beam level control signal

Turn the ignition switch ON, leveling indicator light OFF → ON

10 to 16 V → Below 1 V

RE (C9-13) - Body ground

W - Body ground

Ground (Rheostat ground)

Always

Below 1 V

VR (C9-14) - Body ground

O - Body ground

Light control rheostat signal

Ignition switch ON, rheostat knob position MIN → MAX

Below 1 V → 4 to 6 V

RL (C9-15) - Body ground

B - Body ground

Light control rheostat signal

Ignition switch ON

4 to 6 V

TCAN SW (C9-16) - Body ground

Y - Body ground

Tail cancel switch signal

Ignition switch ON, tail cancel switch OFF → ON

4 to 6 V → Below 1 V

RSET (C9-17) - Body ground

L - Body ground

ODO/TRIP switch signal

Ignition switch ON, ODO/TRIP switch OFF → ON

4 to 6 V → Below 1 V

SPEED SIGNAL (C9-18) - Body ground

BR - Body ground

Speed signal (Input)

Ignition switch ON, turn the wheel slowly

Pulse generation (See a waveform 2)

FUEL SENDER (C9-19) - Body ground

V - Body ground

Fuel level signal

Ignition switch ON, fuel level MIN → MAX

4 to 9 V → Below 2V

P SEAT BELT (C9-22) (⁽¹⁾) - Body ground

R - Body ground

Passenger side seat belt signal

Ignition switch ON, passenger seat belt warning light OFF → blinks

10 to 16 V → Below 1 V

WASHER LEVEL (C9-24) - Body ground

LG - Body ground

Washer level indicator light signal

Turn the ignition switch ON, washer level indicator light OFF → ON

10 to 16 V → Below 1 V

⁽¹⁾	with LEXUS Navigation System

Waveform (Reference): Using an oscilloscope:

WAVEFORM REFERENCE

Item	Condition
Tool setting	1 V/DIV., 2 μsec/DIV,
Vehicle condition	Turn the ignition switch to the ON position.

Fig 2: Waveform Graph

G05280467

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform (Reference): Using an oscilloscope:

OK:

WAVEFORM REFERENCE

Item	Condition
Tool setting	5 V/DIV., 20 ms/DIV.
Vehicle condition	Driving at approx. 20 km/h (12 mph)

HINT:

As vehicle speed increases, the cycle of the signal waveform narrows.

Fig 3: Waveform Graph

G05280468

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Integration Control & Panel Assembly (w/o Navigation System)

Fig 4: Identifying Integration Control & Panel Assembly Connector Terminals (w/o Navigation System)

G05274127

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
+B (C4-1) - Body ground	O - Body ground	Battery	Always	10 to 14 V
ACC (C4-2) - Body ground	GR - Body ground	Ignition Switch Signal	Ignition switch OFF → ON	Below 1 V → 10 to 14 V
LP (C4-4) - Body ground	P - Body ground	Security Indicator Signal	Ignition switch ON, security indicator light ON → OFF	Below 1 V → 10 to 14 V
MPX+ (C4-5) - Body ground	L - Body ground	Multiplex Communication Signal	-	-
P-AB (C4-6) - Body ground	BR - Body ground	Passenger Airbag Off Indicator Light Signal	Ignition switch ON, passenger airbag off indicator light OFF → ON	Below 1 V → 10 to 14 V
GND (C4-7) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
ILL+ (C4-8) - Body ground	G - Body ground	Illumination Signal	Combination switch OFF → Head	Below 1 V → 10 to 14 V
IG+ (C4-9) - Body ground	LG - Body ground	Ignition Switch Signal	Ignition switch signal	Below 1 V → 10 to 14 V
F (C4-11) - Body ground	V - Body ground	Turn Light Signal	Turn indicator light OFF → ON	Below 1V → 10 to 14 V
MPX- (C4-12)	R - Body ground	Multiplex Communication Signal	-	-
PAON (C4-13) - Body ground	Y - Body ground	Passenger Airbag On Indicator Light Signal	Ignition switch ON, passenger airbag on indicator light OFF → ON	Below 1 V → 10 to 14 V
ILL- (C4-14) - Body ground	W - Body ground	Illumination Signal	Ignition switch ON, combination switch Head, and light control rheostat position MIN. h>MAX.	Pulse generation (See a)

Waveform (Reference): Using an oscilloscope:

OK:

WAVEFORM REFERENCE

Item	Condition
Tool setting	5V/DIV., 2 ms/DIV.
Vehicle condition	Turn the ignition switch ON, light control rheostat is in the MID position.

Fig 5: Waveform Graph

G04966494

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Multi-Display Assembly (w/ Navigation System)

Fig 6: Identifying Multi-Display Assembly Connector Terminals (w/ Navigation System)

G05280471

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND (M5-1) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
IG (M5-10) - Body ground	LG - Body ground	Ignition Switch Signal	Ignition switch OFF → ON	Below 1 V → 10 to 16 V
ACC (M5-2) - Body ground	GR - Body ground	Ignition Switch Signal	Ignition switch OFF → ON	Below 1 V → 10 to 16 V
+B1 (M5-3) - Body ground	G - Body ground	Battery	Always	10 to 16 V
PBEW (M5-16) - Body ground	O - Body ground	Passenger Seat Belt Indicator Light Signal	Ignition switch ON, passenger seat belt indicator light OFF → ON	Pulse generation (See a)

Waveform (Reference): Using an oscilloscope:

OK:

WAVEFORM REFERENCE

Item	Condition
Tool setting	5 V/DIV., 200 ms/DIV.
Vehicle condition	Turn the ignition switch ON, p-belt indicator light blinks.

Fig 7: Waveform Graph

G05280468

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

COMBINATION METER INNER CIRCUIT

Fig 8: Combination Meter Inner Circuit Diagram (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 9: Combination Meter Inner Circuit Diagram (2 Of 2)

G05280474

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION

Terminal No.

Wire harness side

C8

1

Ground (Power Ground)

2

Each part that use illumination signal (Audio Controller, Integration Control & Panel Assembly, Console Box, Multi-display)

3

-

4

Hybrid Vehicle Control ECU (Check Engine)

5

Multiplex Communication Line

6

Each part that use speed signal

7

-

8

Gauge Fuse

9

-

10

-

11

-

12

-

13

Turn Signal Flasher R

14

Turn Signal Flasher L

15

ECU-B Fuse

16

DOME Fuse

C9

1

Ground (Signal Ground)

2

Ground (Fuel Ground)

3

-

4

Multiplex Communication Line

5

-

6

Hybrid Vehicle Control ECU (Fuel Lid A Pin)

7

Hybrid Vehicle Control ECU (Fuel Lid B Pin)

8

Hybrid Vehicle Control ECU (Power Meter)

9

Steering Pad Switch (DISP)

10

Headlight Beam Level Control ECU (⁽¹⁾)

11

-

12

-

13

Light Control Rheostat

14

Light Control Rheostat

15

Light Control Rheostat

16

Light Control Rheostat (Tail Cancel Switch)

17

Light Control Rheostat (ODO/TRIP Switch)

18

ABS & Traction Actuator Assembly

19

Fuel Sender Gauge Assembly

20

-

21

-

22

Integration Control & Panel Assembly (⁽²⁾)/Multi-display (⁽³⁾)

23

-

24

Washer Level Warning Switch

⁽¹⁾

w/o AFS

⁽²⁾	w/o Navigation System

⁽³⁾	w/ Navigation System