СИСТЕМА SFI

Click here

Tip: The standard normal 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 normal voltage for that pair of terminals, displayed in the STD Voltages column. The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbols)	Wiring Colors	Terminal Descriptions	Conditions	STD Voltages
B71-20 (BATT) - D97-105 (E1)	W - W-B	Battery (for measuring the battery voltage and for the ECM memory)	Always	11 to 14 V
B71-3 (+BM) - D97-105 (E1)	Y - W-B	Power source of throttle actuator	Always	11 to 14 V
B71-27 (IGSW) - D97-105 (E1)	B - W-B	Ignition switch	Ignition switch ON	11 to 14 V
B71-2 (+B) - D97-105 (E1)	L - W-B	Power source of ECM	Ignition switch ON	11 to 14 V
B71-44 (MREL) - D97-105 (E1)	G - W-B	EFI relay	Ignition switch ON	11 to 14 V
D97-119 (VC) - D97-72 (E2)	L - Y	Power source of sensor (specific voltage)	Ignition switch ON	4.5 to 5.0 V
D97-113 (VTA1) - D97-72 (E2)	R - Y	Throttle position sensor (for engine control)	Ignition switch ON, Accelerator pedal fully released	0.5 to 1.1 V
D97-113 (VTA1) - D97-72 (E2)	R - Y	Throttle position sensor (for engine control)	Ignition switch ON, Accelerator pedal fully depressed	3.3 to 4.9 V
D97-112 (VTA2) - D97-72 (E2)	G - Y	Throttle position sensor (for sensor malfunction detection)	Ignition switch ON, Accelerator pedal fully released	2.1 to 3.1 V
D97-112 (VTA2) - D97-72 (E2)	G - Y		Ignition switch ON, Accelerator pedal fully depressed	4.5 to 5.0 V
B71-55 (VPA) - B71-59 (EPA)	L - G	Accelerator pedal position sensor (for engine control)	Ignition switch ON, Accelerator pedal fully released	0.5 to 1.1 V
B71-55 (VPA) - B71-59 (EPA)	L - G	Accelerator pedal position sensor (for engine control)	Ignition switch ON, Accelerator pedal fully depressed	2.6 to 4.5 V
B71-56 (VPA2) - B71-60 (EPA2)	B - GR	Accelerator pedal position sensor (for sensor malfunctioning detection)	Ignition switch ON, Accelerator pedal fully released	1.2 to 2.0 V
B71-56 (VPA2) - B71-60 (EPA2)	B - GR		Ignition switch ON, Accelerator pedal fully depressed	3.4 to 4.75 V
B71-57 (VCPA) - B71-59 (EPA)	W - G	Power source of accelerator pedal position sensor (for VPA)	Ignition switch ON	4.5 to 5.5 V
B71-58 (VCP2) - B71-60 (EPA2)	R - GR	Power source of accelerator pedal position sensor (for VPA2)	Ignition switch ON	4.5 to 5.5 V
D97-69 (VG) - D97-92 (E2G)	Y-G - L	Mass air flow meter	Idling, Shift position P or N, A/C switch OFF	0.5 to 3.0 V
D97-87 (THA) - D97-72 (E2)	R - Y	Intake air temperature sensor	Idling, Intake air temperature 20°C (68°F)	0.5 to 3.4 V
D97-64 (THW) - D97-72 (E2)	R-W - Y	Engine coolant temperature sensor	Idling, Engine coolant temperature 80°C (176°F)	0.2 to 1.0 V
D97-66 (RTHW) - D97-72 (E2)	L - Y	Engine coolant temperature (radiator) sensor	Idling, radiator side engine coolant temperature -20 to 80°C (-4 to 176°F)	0.5 to 4.5 V
D97-124 (THB) - D97-72 (E2)	R - Y	Battery temperature sensor	Ignition switch ON	0.5 to 4.5 V
D97-86 (#10) - D97-46 (E01)	B - W-B	Fuel injector	Ignition switch ON	11 to 14 V
D97-85 (#20) - D97-46 (E01)	L - W-B		Ignition switch ON	11 to 14 V
D97-84 (#30) - D97-46 (E01)	Y - W-B		Idling	Pulse generation (see waveform 1)
D97-83 (#40) - D97-46 (E01)	R - W-B		Idling	Pulse generation (see waveform 1)
D97-109 (IGT1) - D97-105 (E1)	R-L - W-B	Ignition coil with igniter (ignition coil signal)	Idling	Pulse generation (see waveform 2)
D97-108 (IGT2) - D97-105 (E1)	L-W - W-B
D97-107 (IGT3) - D97-105 (E1)	B-Y - W-B
D97-106 (IGT4) - D97-105 (E1)	Y-R - W-B
D97-82 (IGF1) - D97-105 (E1)	W-R - W-B	Ignition coil with igniter (ignition confirmation signal)	Ignition switch ON	4.5 to 5.0 V
D97-82 (IGF1) - D97-105 (E1)	W-R - W-B	Ignition coil with igniter (ignition confirmation signal)	Idling	Pulse generation (see waveform 2)
D97-94 (G2) - D97-118 (G2-)	Y - L	Camshaft position sensor	Idling	Pulse generation (see waveform 3)
D97-93 (NE+) - D97-117 (NE-)	W - B	Crankshaft position sensor	Idling	Pulse generation (see waveform 3)
B71-19 (FC) - D97-105 (E1)	L - W-B	Fuel pump control	Ignition switch ON	11 to 14 V
B71-19 (FC) - D97-105 (E1)	L - W-B	Fuel pump control	Idling	Below 1.5 V
D97-43 (M+) - D97-44 (ME01)	Y - W-B	Throttle actuator	Idling with warm engine	Pulse generation (see waveform 4)
D97-42 (M-) - D97-44 (ME01)	L - W-B	Throttle actuator	Idling with warm engine	Pulse generation (see waveform 5)
D97-103 (A1A+) - D97-105 (E1)	Y - W-B	A/F sensor	Always (Ignition switch ON)	3.3 V^*1
D97-126 (A1A-) - D97-105 (E1)	L - W-B	A/F sensor	Always (Ignition switch ON)	3.0 V^*1
D97-80 (OX1B) - D97-72 (E2)	B - Y	Heated oxygen sensor	Engine speed maintained 2,500 rpm for 2 minutes after warming up sensor	Pulse generation (see waveform 6)
D97-104 (HA1A) - D97-41 (E04)	Y - W-B	A/F sensor heater	Idling	Below 3.0 V
D97-104 (HA1A) - D97-41 (E04)	Y - W-B	A/F sensor heater	Ignition switch ON	11 to 14 V
D97-63 (HT1B) - D97-81 (E03)	Y - W-B	Heated oxygen sensor heater	Idling	Below 3.0 V
D97-63 (HT1B) - D97-81 (E03)	Y - W-B	Heated oxygen sensor heater	Ignition switch ON	11 to 14 V
D97-110 (KNK1) - D97-111 (EKNK)	G - R	Knock sensor	Maintain engine speed 4,000 rpm after warming up	Pulse generation (see waveform 7)
D97-74 (OC1+) - D97-96 (OC1-)	G - B	Camshaft timing oil control valve (OCV)	Idling	Pulse generation (see waveform 8)
D97-62 (PRG) - D97-105 (E1)	B - W-B	Purge VSV	Ignition switch ON	11 to 14 V
D97-62 (PRG) - D97-105 (E1)	B - W-B	Purge VSV	Idling	Pulse generation (see waveform 9)
B71-48 (STA) - D97-105 (E1)	R - W-B	Starter signal	Shift position N, ignition switch START	5.5 V or more
B71-36 (STP) - D97-105 (E1)	Y - W-B	Stop light switch	Brake pedal depressed	7.5 to 14 V
B71-36 (STP) - D97-105 (E1)	Y - W-B	Stop light switch	Brake pedal released	Below 1.5 V
B71-35 (ST1-) - D97-105 (E1)	R - W-B	Stop light switch	Ignition switch ON, Brake pedal depressed	Below 1.5 V
B71-35 (ST1-) - D97-105 (E1)	R - W-B	Stop light switch	Ignition switch ON, Brake pedal released	7.5 to 14 V
B71-31 (ELS) - D97-105 (E1)	G - W-B	Electric load	Taillight switch ON	7.5 to 14 V
B71-31 (ELS) - D97-105 (E1)	G - W-B	Electric load	Taillight switch OFF	0 to 1.5 V
B71-50 (ELS2) - D97-105 (E1)	B - W-B	Electric load	Defogger ON	7.5 to 14 V
B71-50 (ELS2) - D97-105 (E1)	B - W-B	Electric load	Defogger OFF	0 to 1.5 V
B71-15 (TACH) - D97-105 (E1)	B - W-B	Engine speed	Idling	Pulse generation (see waveform 10)
B71-38 (SPD) - D97-105 (E1)	P - W-B	Speed signal from combination meter	Driving at 20 km/h (12 mph)	Pulse generation (see waveform 11)
B71-41 (TC) - D97-105 (E1)	G - W-B	Terminal TC of DLC3	Ignition switch ON	11 to 14 V
B71-52 (PSW) - D97-105 (E1)	G - W-B	Power steering oil pressure switch	While turning steering wheel	Below 1.5 V
B71-46 (F/PS) - D97-105 (E1)	B - W-B	Airbag sensor assembly	Idling with warm engine	Pulse generation (see waveform 12)
B71-25 (NSW) - D97-105 (E1)	B - W-B	Park/Neutral switch signal	Ignition switch ON and shift lever in P or N position	Below 1 V
B71-25 (NSW) - D97-105 (E1)	B - W-B	Park/Neutral switch signal	Ignition switch ON and shift lever in any position except P and N	11 to 14 V
B71-8 (CANH) - D97-105 (E1)	B - W-B	Communication signal with other components	Ignition switch ON	Pulse generation (see waveform 13)
B71-9 (CANL) - D97-105 (E1)	W - W-B	Communication signal with other components	Ignition switch ON	Pulse generation (see waveform 14)
B71-43 (AIRV) - D97-105 (E1)	Y - W-B	Air switch valve for secondary air injection system	Ignition switch ON	11 to 14 V
B71-12 (AIRP) - D97-105 (E1)	W - W-B	Air pump control	Ignition switch ON	11 to 14 V
B71-14 (AIDI) - D97-105 (E1)	LG - W-B	Diagnostic information signal for secondary air injection system	Secondary air injection system operates	Pulse generation (see waveform 15)
B71-42 (RFC) - D97-105 (E1)	LG - W-B	Cooling fan control signal	Idling with A/C switch on (Max. COOL)	Pulse generation (see waveform 16)

^*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

Click here

WAVEFORM 1 Fuel injector ECM Terminal Names Between #1 (to #4) and E01 Tester Ranges 20 V/DIV, 20 msec./DIV Conditions Idling Tip: The wavelength becomes shorter as the engine rpm increases. WAVEFORM 2 Igniter IGT signal (from ECM to igniter) Igniter IGF signal (from igniter to ECM) ECM Terminal Names Between IGT (1 to 4) and E1 Between IGF1 and E1 Tester Ranges 2 V/DIV, 20 msec./DIV Conditions Idling Tip: The wavelength becomes shorter as the engine rpm increases. WAVEFORM 3 Camshaft position sensor Crankshaft position sensor ECM Terminal Names Between G2 and G2- Between NE+ and NE- Tester Ranges 5 V/DIV, 20 msec./DIV Conditions Idling Tip: The wavelength becomes shorter as the engine rpm increases. WAVEFORM 4 Throttle actuator positive terminal ECM Terminal Names Between M+ and ME01 Tester Ranges 5 V/DIV, 1 msec./DIV Conditions Idling with warm engine Tip: The duty ratio varies depending on the throttle actuator operation. WAVEFORM 5 Throttle actuator negative terminal ECM Terminal Names Between M- and ME01 Tester Ranges 5 V/DIV, 1 msec./DIV Conditions Idling with warm engine Tip: The duty ratio varies depending on the throttle actuator operation. WAVEFORM 6 Heated oxygen sensor ECM Terminal Names Between OX1B and E2 Tester Ranges 0.2 V/DIV, 200 msec./DIV Conditions Engine speed maintained 2500 rpm for 2 minutes after warming up engine Tip: In the DATA LIST, item O2S B1S2 shows the input values from the heated oxygen sensor to the ECM. WAVEFORM 7 Knock sensor ECM Terminal Names Between KNK1 and EKNK Tester Ranges 1 V/DIV, 1 msec./DIV Conditions Engine speed maintained 4000 rpm after warming up engine Tip: The wavelength becomes shorter as the engine rpm increases. The waveforms and amplitudes displayed differ slightly depending on the vehicle. WAVEFORM 8 Camshaft timing oil control valve (OCV) ECM Terminal Names Between OC1+ and OC1- Tester Ranges 5 V/DIV, 1 msec./DIV Conditions idling WAVEFORM 9 Purge VSV ECM Terminal Names Between PRG and E01 Tester Ranges 10 V/DIV, 20 msec./DIV Conditions Idling Tip: If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more. WAVEFORM 10 Engine speed signal ECM Terminal Names Between TACH and E1 Tester Ranges 5 V/DIV, 10 msec./DIV Conditions Idling Tip: The wavelength becomes shorter as the engine rpm increases. WAVEFORM 11 Vehicle speed signal ECM Terminal Names Between SPD and E1 Tester Ranges 5 V/DIV, 20 msec./DIV Conditions Driving at 20 km/h (12 mph) Tip: The wavelength becomes shorter as the vehicle speed increases. WAVEFORM 12 Airbag sensor assembly ECM Terminal Names Between F/PS and E1 Tester Ranges 5 V/DIV, 500 msec./DIV Conditions Idling with warm engine WAVEFORM 13 CAN communication signal ECM Terminal Names Between CANH and E1 Tester Ranges 1 V/DIV, 10 μs/DIV Conditions Ignition switch ON WAVEFORM 14 CAN communication signal ECM Terminal Names Between CANL and E1 Tester Ranges 1 V/DIV, 10 μs/DIV Conditions Ignition switch ON WAVEFORM 15 Terminal DI of air injection control driver ECM Terminal Names Between AIDI and E1 Tester Ranges 5 V/DIV, 50 ms/DIV Conditions Performing ACTIVE TEST using intelligent tester (secondary air injection system) Tip: The wavelength changes when the air injection control driver detects malfunctions in the secondary air injection system (Click here). WAVEFORM 16 Cooling fan control signal ECM Terminal Names Between RFC and E1 Tester Ranges 1 V/DIV, 20 ms/DIV Conditions Idling with A/C switch on (Max. COOL) Tip: The wavelength becomes shorter as the engine coolant temperature.

СИСТЕМА SFI КОНТАКТЫ ECM