Terminals Of Ecu

COMBINATION METER ASSY

Fig 1: Identifying Combination Meter Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

COMBINATION METER ASSY - VOLTAGE TABLE

Terminal No.

Wiring color

Condition

Specified

C7-1 - C7-20

W - W

Always

10 to 14 V

C7-2 - C7-20

W - W

Ignition switch ON and A/T P indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-3 - C7-20

SB - W

Ignition switch ON and turn signal RH indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-4 - C7-20

SB - W

Ignition switch ON and turn signal LH indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-5 - C7-20

W - W

Ignition switch ON and A/T R indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-6 - C7-20

W - W

Ignition switch ON and A/T 3 indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-8 - C7-20

W - W

Ignition switch OFF --> ACC or ON

Below 1 V --> 10 to 14 V

C7-9 - C7-20

W - W

Ignition switch OFF --> START

Below 1 V --> 10 to 14 V

C7-11 - C7-20

W - W

Engine idle speed

Pulse generation (See WAVE FORM 1 )

C7-12 - C7-20

W - W

Ignition switch ON, coolant temperature is 80 to 95°C (176°F to 203°F)

Pulse generation (See WAVE FORM 2 )

C7-13 - C7-20

W - W

CRUISE indicator light ON --> OFF

Below 1 V --> 10 to 14 V

C7-14 - C7-20

W - W

Ignition switch ON and driver side seat belt indicator light blinks --> OFF

Below 1 V --> 10 to 14 V

C7-15 - Body ground

SB - Body ground

Always

Below 1 Ω

C7-16 - C7-20

W - W

Ignition switch ON and brake fluid level warning light ON --> OFF

Below 1 V --> 10 to 14 V

C7-20 - Body ground

W - Body ground

Always

Below 1 Ω

C7-21 - C7-20

W - W

Ignition switch OFF --> ON

Below 1 V --> 10 to 14 V

C7-22 - C7-20

W - W

Ignition switch ON and A/T N indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-23 - C7-20

W - W

Ignition switch ON and A/T D indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-24 - C7-20

W - W

Ignition switch ON and A/T 2 indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-25 - C7-20

W - W

Ignition switch ON and A/T L indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-26 - C7-20

W - W

Light control switch OFF --> ON

Below 1 V --> 10 to 14 V

C7-27 - C7-20

SB - W

Ignition switch ON and CHARGE indicator light ON --> OFF

Below 1 V --> 10 to 14 V

C7-28 - C7-20

SB - W

Hi-beam OFF --> ON

Below 1 V --> 10 to 14 V

C7-30 - C7-20

W - W

Ignition switch ON and A/T N or P indicator light OFF --> ON

Below 1 V --> 10 to 14 V

C7-31 - C7-20

SB - W

Ignition switch ON and SRS warning light OFF --> On

10 to 14 V --> Below 1 V

C7-33 - C7-20

SB - W

Ignition switch OFF --> ON 10 to 14 V -->

Below 1 V

C7-34 - C7-20

W - W

Ignition switch ON and oil pressure warning light ON --> OFF

Below 1 V --> 10 to 14 V

C7-35 - C7-20

W - W

Ignition switch ON and turn front wheel slowly

Pulse generation (See WAVE FORM 3 )

C7-36 - C7-20

W - W

Ignition switch ON and turn front wheel slowly

Pulse generation (See WAVE FORM 3 )

C7-38 ⁽¹⁾ - C7-20

SB - W

Headlight switch OFF --> ON

Below 1 V --> 10 to 14 V

C7-39 - Body ground

SB - Body ground

P-belt indicator light ON --> OFF

10 to 14 V --> Below 1 V

C7-40 - Body ground

W - Body ground

Always

Below 1 Ω

C8-1 - C7-20

G - W

Always

Below 1 Ω

C8-3 - C7-20

R-Y - W

Ignition switch ON and parking brake switch is not operated --> operate

Below 1 V --> 10 to 14 V

C8-4 - C7-20

R-B - W

Ignition switch ON and ABS warning light OFF --> ON

Below 1 V --> 10 to 14 V

C8-7 - C7-20 LG ⁽²⁾

Y ⁽³⁾ - W

Ignition switch OFF --> ON

Below 1 V --> 4 to 7 V

C8-8 - C7-20

LG - W

Ignition switch OFF and key reminder buzzer sound --> no sound

Below 1 V --> 10 to 14 V

C8-9 - C7-20

R-B - W

Any door open --> close

Below 1 V --> 10 to 14 V

C8-11 - C8-12

W-G - W-B

Ignition switch ON and light switch ON

Pulse generation (See WAVE FORM 4 )

C8-13 - C7-20

LG - W

Ignition switch ON and SLIP indicator light ON --> OFF

Below 1 V --> 10 to 14 V

C8-14 - C7-20

R-L - W

Ignition switch ON and TRC/VSC indicator light ON --> OFF

Below 1 V --> 10 to 14 V

C8-15 - C7-20

L - W

Ignition switch ON and VSC OFF indicator light ON --> OFF

Below 1 V --> 10 to 14 V

C8-16 - C7-20

G-R - W

Ignition switch ON and CHECK ENGINE warning light ON --> OFF

Below 1 V --> 10 to 14 V

C8-17 ⁽⁴⁾ - C7-20

LG-R - W

Ignition switch ON

Pulse generation

C8-18 - C7-20

G-W - W

Ignition switch ON and fuel level EMPTY --> FULL

Below 1 V --> 4 to 7 V

C8-19 - C7-20

Y-R - W

Always

4 to 7 V

C8-20 - C7-20

O ⁽²⁾
W ⁽³⁾ - W

Tail cancel ON --> OFF

4 to 7 V --> Below 1 V

C8-21 - C7-20

P-L - W

Ignition switch ON and washer level warning light ON --> OFF

Below 1 V --> 10 to 14 V

C8-22 - C7-20

O - W

Ignition switch ON and O/D OFF indicator light ON --> OFF

Below 1 V --> 10 to 14 V

⁽¹⁾	U.S.A. Only

⁽²⁾

TMC Made

⁽³⁾

TMMK Made

⁽⁴⁾	Automatic A/C

Wave form 1: Reference: Using oscilloscope:

Fig 2: Identifying Wave Form 1 Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WAVE FORM 1 REFERENCE TABLE

Item	Condition
Tool setting	5 V/DIV, 10 ms/DIV
Vehicle condition	Engine idle speed

Wave form 2: Reference: Using oscilloscope:

Fig 3: Identifying Wave Form 2 Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WAVE FORM 2 REFERENCE TABLE

Item	Condition
Tool setting	5 V/DIV, 10 ms/DIV
Vehicle condition	Ignition switch ON

Wave form 3: Reference: Using oscilloscope:

Fig 4: Identifying Wave Form 3 Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WAVE FORM 3 REFERENCE TABLE

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 wave form narrows.

Wave form 4: Reference: Using oscilloscope:

Fig 5: Identifying Wave Form 4 Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WAVE FORM 4 REFERENCE TABLE

Item	Condition
Tool setting	2 V/DIV, 1 ms/DIV
Vehicle condition	Ignition switch ON

HINT:

Duty ratio changes as illumination becomes darker ("A" becomes longer).

CLOCK ASSY

Fig 6: Identifying Clock Assy Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

BASE GRADE

CLOCK ASSY (BASE GRADE) - REFERENCE TABLE

Terminal No.	Wiring color	Condition	Specified
C5-1 - Body ground	W-B - Body ground	Always	Below 1 Ω
C5-2 - Body ground	B-W - Body ground	Always	Below 1 Ω
C5-3 - C5-2	G-R-B-W	Ignition switch ACC or ON and outside temperature 50°C (122°F) --> -30°C (-22°F)	0.5 V --> 4.3 V
C5-3 - C5-2	G-R-B-W	Ignition switch ACC or ON and outside temperature 25°C (77°F)	1.3 V
C5-5 - Body ground	R-B - Body ground	Ignition switch ON and passenger air bag ON indicator light OFF --> ON	10 to 14 V --> Below 1 V
C5-7 - Body ground	R - Body ground	Ignition switch ON and passenger air bag OFF indicator light OFF --> ON	10 to 14 V --> Below 1 V
C5-8 - Body ground	L-Y - Body ground	Passenger side seat belt warning light flash --> OFF	Below 1 V --> 10 to 14 V
C5-9 - Body ground	V-W - Body ground	Ignition switch ON and turn front wheel slowly	Pulse generation (See WAVE FORM 1 )
C5-11 - Body ground	G - Body ground	Tail light switch OFF --> ON	Below 1 V --> 10 to 14 V
C5-12 - Body ground	R-L - Body ground	Ignition switch OFF --> ON	Below 1 V --> 10 to 14 V
C5-13 - Body ground	GR - Body ground	Ignition switch OFF --> ACC	Below 1 V --> 10 to 14 V
C5-14 - Body ground	R - Body ground	Always	10 to 14 V

HIGH GRADE

CLOCK ASSY (HIGH GRADE) - REFERENCE TABLE

Terminal No.

Wiring color

Condition

Specified

C5-1 - Body ground

W-B - Body ground

Always

Below 1 Ω

C5-2 - Body ground

B-W - Body ground

Always

Below 1 Ω

C5-3 - C5-2

G-R - B-W

Ignition switch ACC or ON and outside temperature 50°C (122°F) --> -30°C (-22°F)

0.5 V --> 4.3 V

Ignition switch ACC or ON and outside temperature 25°C (77°F)

1.3 V

C5 4 Body ground

R Body ground

Ignition switch ACC or ON and INFO switch free --> pressed

5 V --> Below 1 V

C5-4 - Body ground

R - Body ground

Ignition switch ACC or ON and MODE switch free --> pressed

5 V --> 2.5 V

C5-5 - Body ground

LG-R - Body ground

Ignition switch ON

Pulse generation

C5-7 - Body ground

L - Body ground

Engine idle speed

Pulse generation

C5-9 - Body ground

B-R - Body ground

Ignition switch OFF --> ON

Below 1 V --> 10 to 14 V

C5-10 - Body ground

W-B - Body ground

Always

4 to 7 V

C5-11 - Body ground

W-B - Body ground

Always

4 to 7 V

C5-12 - Body ground

W-B ⁽¹⁾ - Body ground

Always

Below 1 Ω

C5-13 - Body ground

R - Body ground

Ignition switch ON and passenger air bag OFF indicator light OFF --> ON

10 to 14 V --> Below 1 V

C5-14 - Body ground

L-Y - Body ground

Passenger side seat belt warning light flash --> OFF

Below 1 V --> 10 to 14 V

C5-15 - Body ground

V-W - Body ground

Ignition switch ON and turn front wheel slowly

Pulse generation (See WAVE FORM 1 )

C5-16 - Body ground

G-Y - Body ground

Ignition switch ACC or ON

Pulse generation

C5-17 - Body ground

R-B - Body ground

Ignition switch ON and passenger air bag ON indicator light OFF --> ON

10 to 14 V --> Below 1 V

C5-18 - Body ground

G - Body ground

Tail light switch OFF --> ON

Below 1 V --> 10 to 14 V

C5-20 - Body ground

R-L - Body ground

Ignition switch OFF --> ON

Below 1 V --> 10 to 14 V

C5-22 - Body ground

GR - Body ground

Ignition switch OFF --> ACC

Below 1 V --> 10 to 14 V

C5-24 - Body ground

R - Body ground

Always

10 to 14 V

⁽¹⁾

1MZ-FE

Wave form 1: Reference: Using oscilloscope:

Fig 7: Identifying Wave Form 1 Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WAVE FORM 1 REFERENCE TABLE

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 wave form narrows.