METER / GAUGE SYSTEM > TERMINALS OF ECU

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COMBINATION METER ASSEMBLY

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

Terminal No. (Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
H19-3 (LVWG)*1 - Body ground
L - Body ground
Headlight leveling signal
Power switch on (IG), leveling indicator light off
11 to 14 V
Power switch on (IG), leveling indicator light on
Below 1 V
H19-4 (RRSB)*2 or *3 - Body ground
R - Body ground
Rear seat belt buckle switch RH signal
Power switch on (IG), rear seat belt buckle switch RH unfastened
Below 1 V
Power switch on (IG), rear seat belt buckle switch RH fastened
11 to 14 V
H19-5 (RCSB)*2 or *3 - Body ground
L - Body ground
Rear seat belt buckle switch center signal
Power switch on (IG), rear seat belt buckle switch center unfastened
Below 1 V
Power switch on (IG), rear seat belt buckle switch center fastened
11 to 14 V
H19-6 (RLSB)*2 or *3 - Body ground
B - Body ground
Rear seat belt buckle switch LH signal
Power switch on (IG), rear seat belt buckle switch LH unfastened
Below 1 V
Power switch on (IG), rear seat belt buckle switch LH fastened
11 to 14 V
H19-7 (WLVL) - Body ground
LG - Body ground
Washer level warning light signal
Power switch on (IG), washer warning light off
4 to 6 V
Power switch on (IG), washer warning light on
Below 1 V
H19-8 (S) - Body ground
G - Body ground
Oil pressure signal
Power switch on (IG), oil pressure warning light off
4 to 6 V
Power switch on (IG), washer warning light on
Below 1 V
H19-9 (E2) - Body ground
W-B - Body ground
Ground
Always
Below 1 Ω
H19-10 (ILL-) - Body ground
B - Body ground
Illumination signal
Power switch on (IG), light control switch in tail or head position
Pulse generation
H19-11 (ECOD) - Body ground
P - Body ground
Combination switch assembly signal
Power switch on (IG), combination switch assembly not operated
11 to 14 V
Power switch on (IG), combination switch assembly turns counterclockwise (on ECO position)
Below 1 V
H19-12 (IMAN) - Body ground
R - Body ground
Combination switch assembly signal
Power switch on (IG), combination switch assembly not operated
11 to 14 V
Power switch on (IG), combination switch assembly turns clockwise (on SPORT position)
Below 1 V
H19-13 (ACIN) - Body ground
L - Body ground
Rear passenger seat condition signal
Power switch on (IG), rear passenger seat not occupied
Below 1 V
Power switch on (IG), any of rear passenger seat occupied
4 to 6 V
H19-14 (REV) - Body ground
G - Body ground
Light control rheostat signal
Power switch on (IG), light control rheostat turns fully upwards (MAX.)
8 kΩ or higher
Power switch on (IG), light control rheostat position between (MIN.) and (MAX.)
50 to 8 kΩ
Power switch on (IG), light control rheostat turns fully downwards (MIN.)
Below 50 Ω
H19-15 (TC) - H19-16 (SW1)
L - SB
Tail cancel signal
Power switch on (IG), light control rheostat turns fully upwards (MAX.)
8 kΩ or higher
Power switch on (IG), light control rheostat position except above
Below 8 kΩ
H19-16 (SW1) - Body ground
SB - Body ground
Light control rheostat signal
Always
4 to 6 V
H19-19 (STRG) - Body ground
P - Body ground
DISP switch (Steering pad switch assembly) signal
Power switch on (IG), DISP switch not pressed
4 to 6 V
Power switch on (IG), DISP switch pressed
Below 1 V
H19-21 (IG2) - Body ground
BR - Body ground
Power switch signal
Power switch off
Below 1 V
Power switch on (IG)
11 to 14 V
H19-22 (B) - Body ground
V - Body ground
Auxiliary battery
Power switch off
11 to 14 V
H19-23 (B) - Body ground
G - Body ground
Turn indicator light signal
Power switch on (IG), turn signal RH indicator light off
Below 1 V
Power switch on (IG), turn signal RH indicator light blinking
Below 1 V ←→ 11 to 14 V
H19-24 (B) - Body ground
Y - Body ground
Turn indicator light signal
Power switch on (IG), turn signal LH indicator light off
Below 1 V
Power switch on (IG), turn signal LH indicator light blinking
Below 1 V ←→ 11 to 14 V
H19-26 (TWS3) - H19-9 (E2)
GR - W-B
Engine coolant temperature sensor signal
Power switch on (IG), coolant temperature below 113°C (235°F)
0.2 to 4.8 V
Power switch on (IG), coolant temperature below 120°C (248°F)
Below 0.15 V
H19-27 (L) - H19-30 (FE)
SB - P
Fuel signal
Power switch on (IG), fuel level not low
4 to 14 V
Power switch on (IG), fuel level low
4 V or less
H19-28 (EFI) - Body ground
R - Body ground
MIL (Check engine warning light) signal
Power switch on (IG), MIL off
11 to 14 V
Power switch on (IG), MIL on
Below 1 V
H19-29 (P/SB) - Body ground
B - Body ground
Front passenger side seat belt buckle switch signal, front passenger seat condition signal
Power switch on (IG), sit on the front passenger seat, and front passenger side seat belt unfastened
Below 1 V
Power switch on (IG), sit on the front passenger seat, and front passenger side seat belt fastened
11 to 14 V
H19-31 (CANL) - Body ground
V - Body ground
CAN communication line
-
-
H19-32 (CANH) - Body ground
P - Body ground
CAN communication line
-
-
H19-33 (EP) - Body Ground
W-B - Body ground
Ground
Always
Below 1 Ω
H19-34 (E2) - Body Ground
G - Body ground
Ground
Always
Below 1 Ω
H19-36 (SW3) - Body ground
W - Body ground
Ground
Always
Below 1 Ω
H19-39 (SI) - Body ground
V - Body ground
Speed signal for other system (Input)
Power switch on (IG), turn the wheel slowly.
Pulse generation
(See waveform 1)
H19-40 (+S) - Body ground
V - Body ground
Speed signal for other system (Output)
Power switch on (IG), turn the wheel slowly.
Pulse generation
(See waveform 1)

*1: w/ Automatic Type Headlight Beam Level Control
*2: w/ Seat Heater
*3: w/ Rear Seat Belt Warning

Waveform 1 (Reference): Using an oscilloscope:
Item
Condition
Tool setting
5 V/DIV., 20 ms/DIV.
Vehicle condition
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.

COMBINATION METER ASSEMBLY INNER CIRCUIT

Terminal No.		Wire Harness Side
H19	1	-
	2	-
	3 (LVWG)	Headlight leveling ECU assembly*1
	4 (RRSB)	Rear seat inner belt assembly RH5 or 6
	5 (RCSB)	Rear seat inner with center belt assembly LH (for Center)5 or 6
	6 (RLSB)	Rear seat inner with center belt assembly LH (for LH)5 or 6
	7 (WLVL)	Washer fluid level warning switch
	8 (S)	Oil pressure switch
	9 (E2)	Ground
	10 (ILL-)	Each part that uses the illumination signal
	11 (ECOD)	Combination switch assembly
	12 (IMAN)	Combination switch assembly
	13 (ACIN)	Air conditioning amplifier assembly
	14 (REV)	Light control rheostat
	15 (TC)	Light control rheostat
	16 (SW1)	Light control rheostat
	17	-
	18	-
	19 (STRG)	DISP switch (Steering pad switch assembly)
	20	-
	21(IG2)	MET
	22 (B)	ECU-B Fuse
	23 (B)	Turn signal flasher assembly
	24 (B)	Turn signal flasher assembly
	25	-
	26 (TWS3)	Engine coolant temperature sensor
	27 (L)	Fuel sender gauge assembly
	28 (EFI)	ECM
	29 (P/SB)	Separate type front seat cushion pad, front seat inner belt assembly RH7 or LH8
	30 (FE)	Fuel sender gauge assembly
	31(CANL)	CAN communication line
	32 (CANH)	CAN communication line
	33 (EP)	Ground
	34 (E2)	Engine coolant temperature Sensor
	35	-
	36 (SW3)	Light control rheostat
	37	-
	38	-
	39 (SI)	Skid control ECU
	40 (+S)	Each Part that uses the Speed Signal

*1: w/ Automatic Type Headlight Beam Level Control
*5: w/ Seat Heater
*6: w/ Rear Seat Belt Warning
*7: for LHD
*8: for RHD

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H19-3 (LVWG)*1 - Body ground	L - Body ground	Headlight leveling signal	Power switch on (IG), leveling indicator light off	11 to 14 V
H19-3 (LVWG)*1 - Body ground	L - Body ground	Headlight leveling signal	Power switch on (IG), leveling indicator light on	Below 1 V
H19-4 (RRSB)2 or 3 - Body ground	R - Body ground	Rear seat belt buckle switch RH signal	Power switch on (IG), rear seat belt buckle switch RH unfastened	Below 1 V
H19-4 (RRSB)2 or 3 - Body ground	R - Body ground	Rear seat belt buckle switch RH signal	Power switch on (IG), rear seat belt buckle switch RH fastened	11 to 14 V
H19-5 (RCSB)2 or 3 - Body ground	L - Body ground	Rear seat belt buckle switch center signal	Power switch on (IG), rear seat belt buckle switch center unfastened	Below 1 V
H19-5 (RCSB)2 or 3 - Body ground	L - Body ground	Rear seat belt buckle switch center signal	Power switch on (IG), rear seat belt buckle switch center fastened	11 to 14 V
H19-6 (RLSB)2 or 3 - Body ground	B - Body ground	Rear seat belt buckle switch LH signal	Power switch on (IG), rear seat belt buckle switch LH unfastened	Below 1 V
H19-6 (RLSB)2 or 3 - Body ground	B - Body ground	Rear seat belt buckle switch LH signal	Power switch on (IG), rear seat belt buckle switch LH fastened	11 to 14 V
H19-7 (WLVL) - Body ground	LG - Body ground	Washer level warning light signal	Power switch on (IG), washer warning light off	4 to 6 V
H19-7 (WLVL) - Body ground	LG - Body ground	Washer level warning light signal	Power switch on (IG), washer warning light on	Below 1 V
H19-8 (S) - Body ground	G - Body ground	Oil pressure signal	Power switch on (IG), oil pressure warning light off	4 to 6 V
H19-8 (S) - Body ground	G - Body ground	Oil pressure signal	Power switch on (IG), washer warning light on	Below 1 V
H19-9 (E2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
H19-10 (ILL-) - Body ground	B - Body ground	Illumination signal	Power switch on (IG), light control switch in tail or head position	Pulse generation
H19-11 (ECOD) - Body ground	P - Body ground	Combination switch assembly signal	Power switch on (IG), combination switch assembly not operated	11 to 14 V
H19-11 (ECOD) - Body ground	P - Body ground	Combination switch assembly signal	Power switch on (IG), combination switch assembly turns counterclockwise (on ECO position)	Below 1 V
H19-12 (IMAN) - Body ground	R - Body ground	Combination switch assembly signal	Power switch on (IG), combination switch assembly not operated	11 to 14 V
H19-12 (IMAN) - Body ground	R - Body ground	Combination switch assembly signal	Power switch on (IG), combination switch assembly turns clockwise (on SPORT position)	Below 1 V
H19-13 (ACIN) - Body ground	L - Body ground	Rear passenger seat condition signal	Power switch on (IG), rear passenger seat not occupied	Below 1 V
H19-13 (ACIN) - Body ground	L - Body ground	Rear passenger seat condition signal	Power switch on (IG), any of rear passenger seat occupied	4 to 6 V
H19-14 (REV) - Body ground	G - Body ground	Light control rheostat signal	Power switch on (IG), light control rheostat turns fully upwards (MAX.)	8 kΩ or higher
			Power switch on (IG), light control rheostat position between (MIN.) and (MAX.)	50 to 8 kΩ
			Power switch on (IG), light control rheostat turns fully downwards (MIN.)	Below 50 Ω
H19-15 (TC) - H19-16 (SW1)	L - SB	Tail cancel signal	Power switch on (IG), light control rheostat turns fully upwards (MAX.)	8 kΩ or higher
H19-15 (TC) - H19-16 (SW1)	L - SB	Tail cancel signal	Power switch on (IG), light control rheostat position except above	Below 8 kΩ
H19-16 (SW1) - Body ground	SB - Body ground	Light control rheostat signal	Always	4 to 6 V
H19-19 (STRG) - Body ground	P - Body ground	DISP switch (Steering pad switch assembly) signal	Power switch on (IG), DISP switch not pressed	4 to 6 V
H19-19 (STRG) - Body ground	P - Body ground	DISP switch (Steering pad switch assembly) signal	Power switch on (IG), DISP switch pressed	Below 1 V
H19-21 (IG2) - Body ground	BR - Body ground	Power switch signal	Power switch off	Below 1 V
H19-21 (IG2) - Body ground	BR - Body ground	Power switch signal	Power switch on (IG)	11 to 14 V
H19-22 (B) - Body ground	V - Body ground	Auxiliary battery	Power switch off	11 to 14 V
H19-23 (B) - Body ground	G - Body ground	Turn indicator light signal	Power switch on (IG), turn signal RH indicator light off	Below 1 V
H19-23 (B) - Body ground	G - Body ground	Turn indicator light signal	Power switch on (IG), turn signal RH indicator light blinking	Below 1 V ←→ 11 to 14 V
H19-24 (B) - Body ground	Y - Body ground	Turn indicator light signal	Power switch on (IG), turn signal LH indicator light off	Below 1 V
H19-24 (B) - Body ground	Y - Body ground	Turn indicator light signal	Power switch on (IG), turn signal LH indicator light blinking	Below 1 V ←→ 11 to 14 V
H19-26 (TWS3) - H19-9 (E2)	GR - W-B	Engine coolant temperature sensor signal	Power switch on (IG), coolant temperature below 113°C (235°F)	0.2 to 4.8 V
H19-26 (TWS3) - H19-9 (E2)	GR - W-B	Engine coolant temperature sensor signal	Power switch on (IG), coolant temperature below 120°C (248°F)	Below 0.15 V
H19-27 (L) - H19-30 (FE)	SB - P	Fuel signal	Power switch on (IG), fuel level not low	4 to 14 V
H19-27 (L) - H19-30 (FE)	SB - P	Fuel signal	Power switch on (IG), fuel level low	4 V or less
H19-28 (EFI) - Body ground	R - Body ground	MIL (Check engine warning light) signal	Power switch on (IG), MIL off	11 to 14 V
H19-28 (EFI) - Body ground	R - Body ground	MIL (Check engine warning light) signal	Power switch on (IG), MIL on	Below 1 V
H19-29 (P/SB) - Body ground	B - Body ground	Front passenger side seat belt buckle switch signal, front passenger seat condition signal	Power switch on (IG), sit on the front passenger seat, and front passenger side seat belt unfastened	Below 1 V
H19-29 (P/SB) - Body ground	B - Body ground		Power switch on (IG), sit on the front passenger seat, and front passenger side seat belt fastened	11 to 14 V
H19-31 (CANL) - Body ground	V - Body ground	CAN communication line	-	-
H19-32 (CANH) - Body ground	P - Body ground	CAN communication line	-	-
H19-33 (EP) - Body Ground	W-B - Body ground	Ground	Always	Below 1 Ω
H19-34 (E2) - Body Ground	G - Body ground	Ground	Always	Below 1 Ω
H19-36 (SW3) - Body ground	W - Body ground	Ground	Always	Below 1 Ω
H19-39 (SI) - Body ground	V - Body ground	Speed signal for other system (Input)	Power switch on (IG), turn the wheel slowly.	Pulse generation (See waveform 1)
H19-40 (+S) - Body ground	V - Body ground	Speed signal for other system (Output)	Power switch on (IG), turn the wheel slowly.	Pulse generation (See waveform 1)

Item	Condition
Tool setting	5 V/DIV., 20 ms/DIV.
Vehicle condition	Wheel being rotated