Terminals Of ECM

CHECK ECM

Fig 1: ECM Connector Terminals Identification - SFI System

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the ECM connectors.

HINT:

The standard voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Symbol (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
BATT (A9-1) - E1 (B30-81)	W - BR	Battery (for measuring battery voltage and for ECM memory)	Always	11 to 14 V
+BM (B30-41) - E1 (B30-81)	LG - BR	Power source of throttle actuator	Always	11 to 14 V
IGSW (A9-28) - E1 (B30-81)	B - BR	Ignition switch	Ignition switch ON	11 to 14 V
+B (A9-3) - E1 (B30-81)	B - BR	Power source of ECM	Ignition switch ON	11 to 14 V
+B2 (A9-2) - E1 (B30-81)	B - BR	Power source of ECM	Ignition switch ON	11 to 14 V
OC1+ (B30-58) - OC1- (B30-57)	W - B	Camshaft timing oil control valve (OCV) (Intake side (bank 1))	Ignition switch ON	Pulse generation (seeFig 2 waveform 1)
OC2+ (B30-52) - OC2- (B30-51)	BR - B	Camshaft timing oil control valve (OCV) (Intake side (bank 2))	Ignition switch ON	Pulse generation (seeFig 2 waveform 1)
OE1+ (B30-56) - OE1- (B30-55)	R - LG	Camshaft timing oil control valve (OCV) (Exhaust side (bank 1))	Ignition switch ON	Pulse generation (seeFig 2 waveform 1)
OE2+ (B30-50) - OE2- (B30-49)	W - B	Camshaft timing oil control valve (OCV) (Exhaust side (bank 2))	Ignition switch ON	Pulse generation (seeFig 2 waveform 1)
MREL (A9-34) - E1 (B30-81)	P - BR	EFI relay	Ignition switch ON	11 to 14 V
VG (B30-74) - E2G (B30-75)	GR - LG	Mass air flow meter	Idling, Shift lever position P or N, A/C switch OFF	0.5 to 3.0 V
THA (B30-73) - ETHA (B30-98)	P - G-R	Intake air temperature sensor	Idling, Intake air temperature 20°C (68°F)	0.5 to 3.4 V
THW (B30-76) - ETHW (B30-97)	L - BR	Engine coolant temperature sensor	Idling, Engine coolant temperature 80°C (176°F)	0.2 to 1.0 V
VCTA (B30-80) - ETA (B30-79)	B - W	Power source for throttle position sensor (fixed voltage)	Ignition switch ON	4.5 to 5.5 V
VTA1 (B30-78) - ETA (B30-79)	Y - W	Throttle position sensor (for engine control)	Ignition switch ON, Throttle valve fully closed	0.5 to 1.1 V
VTA1 (B30-78) - ETA (B30-79)	Y - W	Throttle position sensor (for engine control)	Ignition switch ON, Throttle valve fully open	3.3 to 4.9 V
VTA2 (B30-77) - ETA (B30-79)	GR - W	Throttle position sensor (for sensor malfunction detection)	Ignition switch ON, Throttle valve fully closed	2.1 to 3.1 V
VTA2 (B30-77) - ETA (B30-79)	GR - W	Throttle position sensor (for sensor malfunction detection)	Ignition switch ON, Throttle valve fully open	4.6 to 5.0 V
VPA (A9-55) - EPA (A9-58)	W - Y	Accelerator pedal position sensor (for engine control)	Ignition switch ON, Accelerator pedal released	0.5 to 1.1 V
VPA (A9-55) - EPA (A9-58)	W - Y	Accelerator pedal position sensor (for engine control)	Ignition switch ON, Accelerator pedal fully depressed	2.6 to 4.5 V
VPA2 (A9-56) - EPA2 (A9-60)	R - P	Accelerator pedal position sensor (for sensor malfunction detection)	Ignition switch ON, Accelerator pedal released	1.2 to 2.0 V
VPA2 (A9-56) - EPA2 (A9-60)	R - P		Ignition switch ON, Accelerator pedal fully depressed	3.4 to 5.0 V
VCPA (A9-57) - EPA (A9-58)	B - Y	Power source of accelerator pedal position sensor (for VPA)	Ignition switch ON	4.5 to 5.5 V
VCP2 (A9-59) - EPA2 (A9-60)	L - P	Power source of accelerator pedal position sensor (for VPA2)	Ignition switch ON	4.5 to 5.5 V
HA1A (B30-22) - E04 (B30-23) HA2A (B30-20) - E04 (B30-23)	G - BR B - BR	A/F sensor heater	Idling	Below 3.0 V
HA1A (B30-22) - E04 (B30-23) HA2A (B30-20) - E04 (B30-23)	G - BR B - BR	A/F sensor heater	Ignition switch ON	11 to 14 V
A1A+ (B30-126) - E1 (B30-81)	W -BR	A/F sensor	Ignition switch ON	3.3 V*
A1A- (B30-125) - E1 (B30-81)	BR - BR	A/F sensor	Ignition switch ON	3.0 V*
A2A+ (B30-103) - E1 (B30-81)	L - BR	A/F sensor	Ignition switch ON	3.3 V*
A2A- (B30-102) - E1 (B30-81)	Y - BR	A/F sensor	Ignition switch ON	3.0 V*
HT1B (B30-45) - E03 (B30-46) HT2B (B30-44) - E03 (B30-46)	LG - BR Y - BR	Heated oxygen sensor heater	Idling	Below 3.0 V
HT1B (B30-45) - E03 (B30-46) HT2B (B30-44) - E03 (B30-46)	LG - BR Y - BR	Heated oxygen sensor heater	Ignition switch ON	11 to 14 V
OX1B (B30-114) - EX1B (B30-115) OX2B (B30-112) - EX2B- (B30-113)	W - GR B - B-W	Heated oxygen sensor	Engine speed maintained at 2,500 rpm for 2 minutes after warming up sensor	Pulse generation (seeFig 3 waveform 2)
#10 (B30-86) - E01 (B30-43) #20 (B30-109) - E01 (B30-43) #30 (B30-85) - E01 (B30-43) #40 (B30-108) - E01 (B30-43) #50 (B30-84) - E01 (B30-43) #60 (B30-107) - E01 (B30-43)	Y - BR W - BR B - BR BR - BR L - BR G - BR	Injector	Ignition switch ON	11 to 14 V
	Y - BR W - BR B - BR BR - BR L - BR G - BR	Injector	Idling	Pulse generation (seeFig 4 waveform 3)
KNK1 (B30-94) - EKNK (B30-93) KNK2 (B30-117) - EKN2 (B30-116)	R - G B - W	Knock sensor	Engine speed maintained at 4,000 rpm after warming up engine	Pulse generation (seeFig 5 waveform 4)
VCV1 (B30-67) - E1 (B30-81)	G-R - BR	Power source for VVT sensor (specific voltage)	Ignition switch ON	4.5 to 5.0 V
VCV2 (B30-66) - E1 (B30-81)	V - BR	Power source for VVT sensor (specific voltage)	Ignition switch ON	4.5 to 5.0 V
VV1+ (B30-90) - VV1- (B30-89)	P - L-B	Variable valve timing (VVT) sensor (Intake side (bank 1))	Idling	Pulse generation (seeFig 6 waveform 5)
VV2+ (B30-87) - VV2- (B30-88)	W - B	Variable valve timing (VVT) sensor (Intake side (bank 2))	Idling	Pulse generation (seeFig 6 waveform 5)
EV1+ (B30-69) - EV1- (B30-68)	Y - G	Variable valve timing (VVT) sensor (Exhaust side (bank 1))	Idling	Pulse generation (seeFig 7waveform 6)
EV2+ (B30-64) - EV2- (B30-65)	R - L	Variable valve timing (VVT) sensor (Exhaust side (bank 2))	Idling	Pulse generation (seeFig 7 waveform 6)
NE+ (B30-110) - NE- (B30-111)	G - R	Crankshaft position sensor	Idling	Pulse generation (seeFig 6 waveform 5)
IGT1 (B30-40) - E1 (B30-81) IGT2 (B30-39) - E1 (B30-81) IGT3 (B30-38) - E1 (B30-81) IGT4 (B30-37) - E1 (B30-81) IGT5 (B30-36) - E1 (B30-81) IGT6 (B30-35) - E1 (B30-81)	W - BR G-R - BR G - BR LG - BR P - BR V - BR	Ignition coil (ignition signal)	Idling	Pulse generation (seeFig 8 waveform 7)
IGF1 (B30-104) - E1 (B30-81)	Y - BR	Ignition coil (ignition confirmation signal)	Ignition switch ON	4.5 to 5.5 V
IGF1 (B30-104) - E1 (B30-81)	Y - BR	Ignition coil (ignition confirmation signal)	Idling	Pulse generation (seeFig 8 waveform 7)
PRG (B30-63) - E1 (B30-81)	LG - BR	Purge VSV	Ignition switch ON	11 to 14 V
PRG (B30-63) - E1 (B30-81)	LG - BR	Purge VSV	Idling	Pulse generation (seeFig 9 waveform 8)
SPD (A9-13) - E1 (B30-81)	V - BR	Vehicle speed signal from combination meter	Driving at 20 km/h (12 mph)	Pulse generation (seeFig 10 waveform 9)
STA (A9-46) - E1 (B30-81)	LG - BR	Starter signal	Cranking	5.5 V or more
NSW (B30-120) - E1 (B30-81)	G-R - BR	Starter relay control	Ignition switch ON	Below 1.5 V
NSW (B30-120) - E1 (B30-81)	G-R - BR	Starter relay control	Cranking	6.0 V or more
STP (A9-36) - E1 (B30-81)	L - BR	Stop light switch	Brake pedal depressed	7.5 to 14 V
STP (A9-36) - E1 (B30-81)	L - BR	Stop light switch	Brake pedal released	Below 1.5 V
ST1- (A9-35) - E1 (B30-81)	GR - BR	Stop light switch (opposite to voltage at STP terminal)	Ignition switch ON, Brake pedal depressed	Below 1.5 V
ST1- (A9-35) - E1 (B30-81)	GR - BR	Stop light switch (opposite to voltage at STP terminal)	Ignition switch ON, Brake pedal released	7.5 to 14 V
M+ (B30-19) - ME01 (B30-82)	G - BR	Throttle actuator	Idling with warm engine	Pulse generation (seeFig 11 waveform 10)
M- (B30-18) - ME01 (B30-82)	R - BR	Throttle actuator	Idling with warm engine	Pulse generation (seeFig 12 waveform 11)
FC (A9-52) - E1 (B30-81)	W - BR	Fuel pump control	Ignition switch ON	11 to 14 V
FC (A9-52) - E1 (B30-81)	W - BR	Fuel pump control	Idling	Below 1.5 V
FPR (A9-48) - E1 (B30-81)	W - BR	Fuel pump control	Cranking	11 to 14 V
FPR (A9-48) - E1 (B30-81)	W - BR	Fuel pump control	Idling	11 to 14 V
W (A9-24) - E1 (B30-81)	R - BR	MIL	Ignition switch ON	Below 1.5 V
W (A9-24) - E1 (B30-81)	R - BR	MIL	Idling	11 to 14 V
TC (A9-16) - E1 (B30-81)	G - BR	Terminal TC of DLC3	Ignition switch ON	11 to 14 V
TACH (A9-15) - E1 (B30-81)	GR - BR	Engine speed	Idling	Pulse generation (seeFig 13 waveform 12)
VPMP (A9-30) - E1 (B30-81)	W - BR	Vent valve (built into canister pump module)	Ignition switch ON	11 to 14 V
MPMP (A9-49) - E1 (B30-81)	B - BR	Leak detection pump (built into canister pump module)	Leak detection pump OFF	Below 3 V
MPMP (A9-49) - E1 (B30-81)	B - BR	Leak detection pump (built into canister pump module)	Leak detection pump ON	11 to 14 V
VCV1 (B30-67) - ETHA (B30-98)	G-R - G-R	Power source for canister pressure sensor (fixed voltage)	Ignition switch ON	4.5 to 5.5 V
PPMP (B30-121) - ETHA (B30-98)	L - G-R	Canister pressure sensor (built into canister pump module)	Ignition switch ON	3 to 3.6 V
ELS1 (A9-32) - E1 (B30-81)	P - BR	Electric load	Taillight switch ON	7.5 to 14 V
ELS1 (A9-32) - E1 (B30-81)	P - BR	Electric load	Taillight switch OFF	Below 1.5 V
ELS2 (A9-33) - E1 (B30-81)	G - BR	Electric load	Defogger switch ON	7.5 to 14 V
ELS2 (A9-33) - E1 (B30-81)	G - BR	Electric load	Defogger switch OFF	Below 1.5 V
ALT (B30-32) - E1 (B30-81)	P - BR	Generator	Ignition switch ON	11 to 14 V
CANH (A9-10) - E1 (B30-81)	Y - BR	CAN communication line	Ignition switch ON	Pulse generation (seeFig 14 waveform 13)
CANL (A9-11) - E1 (B30-81)	W - BR	CAN communication line	Ignition switch ON	Pulse generation (seeFig 15 waveform 14)
AICV (B30-61) - E1 (B30-81)	B - BR	VSV for air intake control system operation signal	Ignition switch ON	11 to 14 V
ACIS (B30-62) - E1 (B30-81)	R - BR	VSV for ACIS (Acoustic Control Induction System) operation signal	Ignition switch ON	11 to 14 V
STSW (A9-14) - E1 (B30-81)	R - BR	Starter switch	Shift lever in P or N, cranking	6.0 V or higher
ACCR (A9-41) - E1 (B30-81)	LG - BR	ACC control signal	Ignition switch ON → Cranking	11 to 14 V → Below 1 V
STAR (B30-16) - E1 (B30-81)	W - BR	Starter relay control	Ignition switch ON	Below 1.5 V
STAR (B30-16) - E1 (B30-81)	W - BR	Starter relay control	Cranking	5.5 V or higher

HINT:

*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

WAVEFORM 1

Fig 2: Identifying Waveform 1 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CAMSHAFT TIMING OIL CONTROL VALVE (OCV)

Symbol (Terminal No.)	Between OC1+ (B30-58) and OC1- (B30-57) Between OC2+ (B30-52) and OC2- (B30-51) Between OE1+ (B30-56) and OE1- (B30-55) Between OE2+ (B30-50) and OE2- (B30-49)
Tester Range	5 V/DIV., 1 msec./DIV.
Condition	Idling

WAVEFORM 2

Fig 3: Identifying Waveform 2 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HEATED OXYGEN SENSOR

Symbol (Terminal No.)	Between OX1B (B30-114) and EX1B (B30-115) Between OX2B (B30-112) and EX2B (B30-113)
Tester Range	0.2 V/DIV., 200 msec./DIV.
Condition	Engine speed maintained at 2,500 rpm for 2 minutes after warming up sensor

HINT:

In Data List, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.

WAVEFORM 3

Fig 4: Identifying Waveform 3 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INJECTOR NO. 1 (TO NO. 6) INJECTION SIGNAL

Symbol (Terminal No.)	Between #10 (B30-86) and E01 (B30-43) Between #20 (B30-109) and E01 (B30-43) Between #30 (B30-85) and E01 (B30-43) Between #40 (B30-108) and E01 (B30-43) Between #50 (B30-84) and E01 (B30-43) Between #60 (B30-107) and E01 (B30-43)
Tester Range	20 V/DIV., 20 msec./DIV.
Condition	Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 4

Fig 5: Identifying Waveform 4 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

KNOCK SENSOR

Symbol (Terminal No.)	Between KNK1 (B30-94) and EKNK (B30-93) Between KNK2 (B30-117) and EKN2 (B30-116)
Tester Range	1 V/DIV., 1 msec./DIV.
Condition	Engine speed maintained at 4,000 rpm after warming up engine

HINT:

The wavelength becomes shorter as the engine rpm increases.
The waveforms and amplitudes displayed differ slightly depending on the vehicle.

WAVEFORM 5

Fig 6: Identifying Waveform 5 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CRANKSHAFT POSITION SENSOR AND CAMSHAFT POSITION SENSOR

Symbol (Terminal No.)	Between NE+ (B30-110) and NE- (B30-111) Between VV1+ (B30-90) and VV1- (B30-89) Between VV2+ (B30-87) and VV2- (B30-88)
Tester Range	5 V/DIV., 20 msec./DIV.
Condition	Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 6

Fig 7: Identifying Waveform 6 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CRANKSHAFT POSITION SENSOR AND CAMSHAFT POSITION SENSOR

Symbol (Terminal No.)	Between NE+ (B30-110) and NE- (B30-111) Between EV1+ (B30-69) and EV1- (B30-68) Between EV2+ (B30-64) and EV2- (B30-65)
Tester Range	5 V/DIV., 20 msec./DIV.
Condition	Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 7

Fig 8: Identifying Waveform 7 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

IGNITER IGT SIGNAL (FROM ECM TO IGNITER) AND IGNITER IGF SIGNAL (FROM IGNITER TO ECM)

Symbol (Terminal No.)	Between IGT1 (B30-40) and E1 (B30-81) Between IGT2 (B30-39) and E1 (B30-81) Between IGT3 (B30-38) and E1 (B30-81) Between IGT4 (B30-37) and E1 (B30-81) Between IGT5 (B30-36) and E1 (B30-81) Between IGT6 (B30-35) and E1 (B30-81) Between IGF1 (B30-104) and E1 (B30-81)
Tester Range	2 V/DIV., 20 msec./DIV.
Condition	Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 8

Fig 9: Identifying Waveform 8 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

PURGE VSV

Symbol (Terminal No.)	Between PRG (B30-63) and E1 (B30-81)
Tester Range	10 V/DIV., 50 msec./DIV.
Condition	Idling

HINT:

If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

WAVEFORM 9

Fig 10: Identifying Waveform 9 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VEHICLE SPEED SIGNAL

Symbol (Terminal No.)	Between SPD (A9-13) and E1 (B30-81)
Tester Range	2 V/DIV., 20 msec./DIV.
Condition	Driving at 20 km/h (12 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

WAVEFORM 10

Fig 11: Identifying Waveform 10 Graph

THROTTLE ACTUATOR POSITIVE TERMINAL

Symbol (Terminal No.)	Between M+ (B30-19) and ME01 (B30-82)
Tester Range	5 V/DIV., 1 msec./DIV.
Condition	Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 11

Fig 12: Identifying Waveform 11 Graph

THROTTLE ACTUATOR NEGATIVE TERMINAL

Symbol (Terminal No.)	Between M- (B30-18) and ME01 (B30-82)
Tester Range	5 V/DIV., 1 msec./DIV.
Condition	Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 12

Fig 13: Identifying Waveform 12 Graph

ENGINE SPEED SIGNAL

Symbol (Terminal No.)	Between TACH (A9-15) and E1 (B30-81)
Tester Range	5 V/DIV., 10 msec./DIV.
Condition	Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 13

Fig 14: Identifying Waveform 13 Graph

CAN COMMUNICATION SIGNAL

Symbol (Terminal No.)	Between CANH (A9-10) and E1 (B30-81)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Engine stopped and ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

WAVEFORM 14

Fig 15: Identifying Waveform 14 Graph

CAN COMMUNICATION SIGNAL

Symbol (Terminal No.)	Between CANL (A9-11) and E1 (B30-81)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Engine stopped and ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.