Terminals Of Ecu

COMBINATION METER ASSEMBLY

Fig 1: Combination Meter Assembly Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
E30-1 (B2) - Body ground	V - Body ground	Battery	Always	11 to 14 V
E30-2 (B) - Body ground	P - Body ground	Turn RH indicator light signal	Ignition switch on (IG), turn RH indicator light off	11 to 14 V
E30-2 (B) - Body ground	P - Body ground	Turn RH indicator light signal	Ignition switch on (IG), turn RH indicator light blinks	Below 1 V ←→ 11 to 14 V
E30-3 (B) - Body ground	B - Body ground	Turn LH indicator light signal	Ignition switch on (IG), turn LH indicator light off	11 to 14 V
E30-3 (B) - Body ground	B - Body ground	Turn LH indicator light signal	Ignition switch on (IG), turn LH indicator light blinks	Below 1 V ←→ 11 to 14 V
E30-5 (+S) - Body ground	SB - Body ground	Speed signal (Output)	Ignition switch on (IG), front wheel turns slowly	Pulse generation (See waveform 1Fig 2)
E30-7 (P/SB) - Body ground	B - Body ground	Front passenger side seat belt warning light signal	Ignition switch on (IG), front passenger side seat belt warning light off	11 to 14 V
E30-7 (P/SB) - Body ground	B - Body ground	Front passenger side seat belt warning light signal	Ignition switch on (IG), front passenger side seat belt warning light blinks	Below 1 V ←→ 11 to 14 V
E30-9 (FR) - Body ground	GR - Body ground	Fuel level signal	Ignition switch on (IG), fuel level warning light OFF	Below 1 V
E30-9 (FR) - Body ground	GR - Body ground	Fuel level signal	Ignition switch on (IG), fuel level warning light ON	4 to 7 V
E30-13 (MPX-) - Body ground	P - Body ground	Multiplex communication signal	Ignition switch off	Pulse generation
E30-15 (LVWG) - Body ground	G - Body ground	Headlight leveling indicator light signal	Ignition switch on (IG), headlight leveling indicator light off	11 to 14 V
E30-15 (LVWG) - Body ground	G - Body ground	Headlight leveling indicator light signal	Ignition switch on (IG), headlight leveling indicator light blinks	Below 1 V ←→ 11 to 14 V
E30-16 (SW) - Body ground	LG - Body ground	SRS warning light signal	Ignition switch on (IG), SRS warning light off	11 to 14 V
E30-16 (SW) - Body ground	LG - Body ground	SRS warning light signal	Ignition switch on (IG), SRS warning light on	Below 1 V
E30-17 (PBLT) - Body ground	W - Body ground	Front passenger side seat belt buckle switch signal	Ignition switch on (IG), front passenger side seat belt warning light off (seat belt fastened)	11 to 14 V
E30-17 (PBLT) - Body ground	W - Body ground	Front passenger side seat belt buckle switch signal	Ignition switch on (IG), front passenger side seat belt warning light blinks (seat belt unfastened)	Below 1 V ←→ 11 to 14 V
E30-19 (FE) - Body ground	P - Body ground	Ground	Always	Below 1 Ω
E30-20 (ILL-) - Body ground	R - Body ground	Illumination signal	Light control switch off	11 to 14 V
E30-20 (ILL-) - Body ground	R - Body ground	Illumination signal	Light control switch tail or head position	Pulse generation (See waveform 2Fig 3)
E30-21 (B) - Body ground	L - Body ground	Ignition switch signal	Ignition switch off	Below 1 V
E30-21 (B) - Body ground	L - Body ground	Ignition switch signal	Ignition switch on (IG)	11 to 14 V
E30-22 (IG+) - Body ground	R - Body ground	Ignition switch signal	Ignition switch off	Below 1 V
E30-22 (IG+) - Body ground	R - Body ground	Ignition switch signal	Ignition switch on (IG)	11 to 14 V
E30-25 (SI) - Body ground	W - Body ground	Speed signal (Input)	Ignition switch on (IG), front wheel turns slowly	Pulse generation (See waveform 1Fig 2)
E30-29 (TIRE) - Body ground	BE - Body ground	Tire pressure warning light signal	Ignition switch on (IG), tire pressure warning light off	3.2 V or higher
E30-29 (TIRE) - Body ground	BE - Body ground	Tire pressure warning light signal	Ignition switch on (IG), tire pressure warning light blinks	Below 3.2 V
E30-31 (S) - Body ground	Y - Body ground	Tachometer signal	Ignition switch on (IG), engine idling	Pulse generation (See waveform 3Fig 4)
E30-33 (MPX+) - Body ground	LG - Body ground	Multiplex communication signal	Ignition switch off	Pulse generation
E30-35 (MSW) - Body ground	GR - Body ground	Steering pad switch assembly signal	Ignition switch on (IG), DISP switch not pressed	4 to 6 V
E30-35 (MSW) - Body ground	GR - Body ground	Steering pad switch assembly signal	Ignition switch on (IG), DISP switch pressed	Below 1 V
E30-36 (CHK) - Body ground	R - Body ground	MIL (Check engine warning light) signal	Ignition switch on (IG), MIL (check engine warning light) off	Below 2.5 V
E30-36 (CHK) - Body ground	R - Body ground	MIL (Check engine warning light) signal	Ignition switch on (IG), MIL (check engine warning light) blinks	11 to 14 V
E30-37 (B/LE) - Body ground	V - Body ground	Brake fluid level warning switch signal	Ignition switch on (IG), brake fluid level warning light off	Below 1 V
E30-37 (B/LE) - Body ground	V - Body ground	Brake fluid level warning switch signal	Ignition switch on (IG), brake fluid level warning light on	11 to 14 V
E30-39 (ES) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
E30-40 (E2) - Body ground	B - Body ground	Ground	Always	Below 1 Ω

Waveform 1 (Reference): Using an oscilloscope:

Fig 2: View Of Waveform 1 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Waveform 2 (Reference): Using an oscilloscope:

Fig 3: View Of Waveform 2 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Item	Condition
Tool setting	5 V/DIV., 2 ms./DIV.
Vehicle condition	Ignition switch on (IG), light control rheostat position MID

Waveform 3 (Reference): Using an oscilloscope:

Fig 4: View Of Waveform 3 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

ECM

Fig 5: ECM Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
TACH (A55-15) - Body ground	B - Body ground	Tachometer signal	Ignition switch off → on (IG), Engine idle speed	Pulse generation (See waveform 1Fig 6)

Waveform 1 (Reference): Using an oscilloscope:

Fig 6: View Of Waveform 1 Graph

Item	Condition
Tool setting	10 V/DIV., 20 ms./DIV.
Vehicle condition	Engine idle speed

COMBINATION METER INNER CIRCUIT

Fig 7: Combination Meter Inner Circuit Connector Terminal Identification (1 Of 3)

Fig 8: Combination Meter Inner Circuit Connector Terminal Identification (2 Of 3)

Fig 9: Combination Meter Inner Circuit Connector Terminal Identification (3 Of 3)

CONNECTORS:

Terminal No. (Symbol)		Wire Harness Side
E30	1 (B2)	DOME Fuse
	2 (B)	Turn Signal Flasher
	3 (B)	Turn Signal Flasher
	4	-
	5 (+S)	Each part that uses the speed signal
	6	-
	7 (P/SB)	A/C Control Assembly
	8	-
	9 (FR)	Fuel Sender Gauge Assembly
	10	-
	11	-
	12	-
	13 (MPX-)	Gateway ECU
	14	-
	15 (LVWG)	Headlight Leveling ECU
	16 (SW)	Center Airbag Sensor Assembly
	17 (PBLT)	Center Airbag Sensor Assembly
	18	-
	19 (FE)	Fuel Sender Gauge Assembly
	20 (ILL-)	Each part that uses the illumination signal
	21 (B)	ECU-B Fuse
	22 (IG+)	GAUGE No. 2 Fuse
	23	-
	24	-
	25 (SI)	Skid Control ECU
	26	-
	27	-
	28	-
	29 (TIRE)	Tire Pressure Warning ECU
	30	-
	31 (S)	ECM
	32	-
	33 (MPX+)	Front Controller
	34	-
	35 (MSW)	Steering Pad Switch Assembly
	36 (CHK)	ECM
	37 (B/LE)	Brake Fluid Level Warning Switch
	38	-
	39 (ES)	Ground
	40 (E2)	Ground