SFI SYSTEM TERMINALS OF ECM

A01VLC6E02
Text in Illustration
*A for LHD *B for RHD

Tech Tips

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

for LHD
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
A58-1 (BATT) - B22-16 (E1) Y - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
A58-2 (+B) - B22-16 (E1) B - W-B Power source of ECM Ignition switch ON 11 to 14 V
A58-3 (+B2) - B22-16 (E1) L - W-B Power source of ECM Ignition switch ON 11 to 14 V
B22-29 (+BM) - B22-16 (E1) GR - W-B Power source of throttle actuator Always 11 to 14 V
B22-57 (IGT1) - B22-16 (E1) W - W-B

Ignition coil

(ignition signal)

 Idling

Pulse generation

(See waveform 1)
B22-56 (IGT2) - B22-16 (E1) V - W-B
B22-55 (IGT3) - B22-16 (E1) G - W-B
B22-54 (IGT4) - B22-16 (E1) LG - W-B
B22-109 (VCNE) - B22-16 (E1) B - W-B Power source of crankshaft position sensor Ignition switch ON 4.5 to 5.5 V
B22-78 (NE+) - B22-110 (NE-) P - Y Crankshaft position sensor Idling with warm engine

Pulse generation

(See waveform 2)
B22-82 (VV1+) - B22-114 (VV1-) V - P Camshaft position sensor (for intake camshaft) Idling with warm engine

Pulse generation

(See waveform 3)
B22-80 (EV1+) - B22-112 (EV1-) GR - G Camshaft position sensor (for exhaust camshaft) Idling with warm engine

Pulse generation

(See waveform 3)
B22-20 (#10) - B22-51 (E01) B - BR Fuel injector assembly Ignition switch ON 11 to 14 V
B22-17 (#20) - B22-51 (E01) GR - BR
B22-18 (#30) - B22-51 (E01) P - BR Idling

Pulse generation

(See waveform 4)
B22-19 (#40) - B22-51 (E01) L - BR
B22-23 (HA1A) - B22-52 (E04) G - W-B Air fuel ratio sensor heater (bank 1 sensor 1) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 5)
B22-133 (A1A+) - B22-16 (E1) R - W-B Air fuel ratio sensor (bank 1 sensor 1) Ignition switch ON 3.3 V*1
B22-134 (A1A-) - B22-16 (E1) G - W-B Air fuel ratio sensor (bank 1 sensor 1) Ignition switch ON 2.9 V*1
B22-22 (HT1B) - B22-16 (E1) L - W-B Heated oxygen sensor heater (bank 1 sensor 2) Ignition switch ON 11 to 14 V
Idling Below 3.0 V
B22-103 (OX1B) - B22-135 (EX1B) W - R Heated oxygen sensor (bank 1 sensor 2) Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

Pulse generation

(See waveform 6)
B22-123 (KNK1) - B22-124 (EKNK) R - G Knock sensor Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See waveform 7)
A58-44 (SPD) - B22-16 (E1) V - W-B Speed signal from combination meter Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 8)
B22-93 (THW) - B22-94 (ETHW) V - BR Engine coolant temperature sensor Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
B22-90 (THA) - B22-122 (ETHA) P - G Intake air temperature sensor (built into mass air flow meter) Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
B22-91 (VG) - B22-92 (E2G) GR - L Mass air flow meter Idling, Shift lever position P or N (neutral), air conditioner OFF 0.5 to 3.0 V
B22-118 (VCPM) - B22-119 (EPIM) Y - LG Power source of manifold absolute pressure sensor Ignition switch ON 4.5 to 5.5 V
B22-87 (PIM) - B22-119 (EPIM) B - LG Manifold absolute pressure sensor Idling 1.2 to 2.0 V
A58-27 (W) - B22-16 (E1) B - W-B MIL Ignition switch ON (MIL goes off) Below 1.5 V
Idling 11 to 14 V
B22-63 (NSW) - B22-16 (E1) BE - W-B

Clutch start switch signal*2

Park/Neutral position switch signal*3

 Ignition switch ON (clutch pedal fully depressed)*2 Below 3.0 V
Ignition switch ON (clutch pedal released)*2 11 to 14 V
Ignition switch ON (shift lever in P, N)*3 Below 3.0 V
Ignition switch ON (shift lever not in P, N)*3 11 to 14 V
Cranking 6 to 13 V
A58-22 (STA) - B22-16 (E1) BR - W-B Starter signal Ignition switch ON Below 1.5 V
Cranking 5.5 V or more
B22-84 (VTA1) - B22-116 (ETA) Y - V Throttle position sensor (for engine control) Ignition switch ON, Throttle valve fully closed 0.5 to 1.1 V
Ignition switch ON, Throttle valve fully open 3.2 to 4.8 V
B22-83 (VTA2) - B22-116 (ETA) GR - V Throttle position sensor (for sensor malfunction detection) Ignition switch ON, Throttle valve fully closed 2.1 to 3.1 V
Ignition switch ON, Throttle valve fully open 4.6 to 5.0 V
B22-115 (VCTA) - B22-116 (ETA) W - V Power source of throttle position sensor (fixed voltage) Ignition switch ON 4.5 to 5.5 V
A58-53 (VCPA) - A58-52 (EPA) G - V Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
A58-51 (VPA) - A58-52 (EPA) R - V Accelerator pedal position sensor (for engine control) Ignition switch ON, Accelerator pedal released 0.5 to 1.1 V
Ignition switch ON, Accelerator pedal fully depressed 2.5 to 4.5 V
A58-54 (VPA2) - A58-55 (EPA2) L - B Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, Accelerator pedal released 1.2 to 2.0 V
Ignition switch ON, Accelerator pedal fully depressed 3.4 to 4.7 V
A58-56 (VCP2) - A58-55 (EPA2) W - B Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
B22-60 (M+) - B22-59 (ME01) G - BR Throttle actuator Idling with warm engine

Pulse generation

(See waveform 9)
B22-30 (M-) - B22-59 (ME01) BR - BR Throttle actuator Idling with warm engine

Pulse generation

(See waveform 10)
A58-9 (STP) - B22-16 (E1) LG - W-B Stop light switch Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
A58-10 (ST1-) - B22-16 (E1) Y - W-B Stop light switch Ignition switch ON, Brake pedal depressed Below 1.5 V
Ignition switch ON, Brake pedal released 7.5 to 14 V
B22-76 (PRG) - B22-16 (E1) L - W-B Purge VSV Ignition switch ON 11 to 14 V
Idling, under purge control

Pulse generation

(See waveform 11)
A58-21 (FC) - B22-16 (E1) V - W-B Fuel pump control Ignition switch ON 11 to 14 V
Idling Below 1.5 V
A58-23 (TC) - B22-16 (E1) L - W-B Terminal TC of DLC3 Ignition switch ON 11 to 14 V
B22-75 (OC1+) - B22-74 (OC1-) BR - Y Camshaft timing oil control valve (for intake camshaft) Idling

Pulse generation

(See waveform 12)
B22-65 (OE1+) - B22-64 (OE1-) L - W Camshaft timing oil control valve (for exhaust camshaft) Idling

Pulse generation

(See waveform 13)
A58-13 (CANH) - B22-16 (E1) L - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 14)
A58-26 (CANL) - B22-16 (E1) W - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 15)
A58-12 (CANP) - B22-16 (E1) B - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 14)
A58-25 (CANN) - B22-16 (E1) W - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 15)
A58-37 (IGSW) - B22-16 (E1) R - W-B Ignition switch Ignition switch ON 11 to 14 V
A58-46 (MREL) - B22-16 (E1) GR - W-B EFI MAIN relay Ignition switch ON 11 to 14 V
B22-113 (VCV1) - B22-16 (E1) R - W-B Power source for camshaft position sensor (for intake camshaft) Ignition switch ON 4.5 to 5.5 V
B22-111 (VCE1) - B22-16 (E1) L - W-B Power source for camshaft position sensor (for exhaust camshaft) Ignition switch ON 4.5 to 5.5 V
B22-81 (D) - B22-16 (E1) L - W-B

No. 2 Clutch start switch signal*2

Park/Neutral position switch signal*3

 Ignition switch ON, clutch pedal depressed*2 Below 1.0 V
Ignition switch ON, clutch pedal released*2 11 to 14 V
Ignition switch ON (shift lever in D)*3 11 to 14 V
Ignition switch ON (shift lever not in D)*3 Below 1.0 V
B22-79 (R) - B22-16 (E1) R - W-B

Back-up light switch signal*2

Park/Neutral position switch signal*3

 Back-up light switch on*2 11 to 14 V
Back-up light switch off*2 Below 1.0 V
Ignition switch ON (shift lever in R)*3 11 to 14 V
Ignition switch ON (shift lever not in R)*3 Below 1.0 V
B22-28 (EGR1) - B22-16 (E1) R - W-B EGR valve assembly Engine racing with warm engine

Pulse generation

(See waveform 16)
B22-27 (EGR2) - B22-16 (E1) LG - W-B EGR valve assembly Engine racing with warm engine

Pulse generation

(See waveform 17)
B22-26 (EGR3) - B22-16 (E1) W - W-B EGR valve assembly Engine racing with warm engine

Pulse generation)

(See waveform 16)
B22-25 (EGR4) - B22-16 (E1) Y - W-B EGR valve assembly Engine racing with warm engine

Pulse generation

(See waveform 17)
A58-30 (NEO) - B22-16 (E1) V - W-B Crankshaft position sensor signal Idling with warm engine

Pulse generation

(See waveform 18)
A58-31 (TACH) - B22-16 (E1) LG - W-B Engine speed Idling

Pulse generation

(See waveform 19)
A58-4 (ELS1) - B22-16 (E1) G - W-B Electric load Tail light switch on 11 to 14 V
Tail light switch off Below 1.5 V
A58-17 (ELS2) - B22-16 (E1) B - W-B Electric load Defogger switch on 11 to 14 V
Defogger switch off Below 1.5 V
A58-7 (FANL) - B22-16 (E1) R - W-B FAN NO. 1 relay Ignition switch ON 11 to 14 V

Idling with A/C ON or

High engine coolant temperature

 Below 1.5 V
A58-8 (FANH) - B22-16 (E1) G - W-B FAN NO. 2 relay Idling with high engine coolant temperature Below 1.5 V

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

*2: for Manual Transaxle

*3: for CVT

for RHD
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
A58-1 (BATT) - B23-16 (E1) Y - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
A58-2 (+B) - B23-16 (E1) B - W-B Power source of ECM Ignition switch ON 11 to 14 V
A58-3 (+B2) - B23-16 (E1) L - W-B Power source of ECM Ignition switch ON 11 to 14 V
B23-29 (+BM) - B23-16 (E1) GR - W-B Power source of throttle actuator Always 11 to 14 V
B23-57 (IGT1) - B23-16 (E1) W - W-B

Ignition coil

(ignition signal)

 Idling

Pulse generation

(See waveform 1)
B23-56 (IGT2) - B23-16 (E1) V - W-B
B23-55 (IGT3) - B23-16 (E1) G - W-B
B23-54 (IGT4) - B23-16 (E1) LG - W-B
B23-109 (VCNE) - B23-16 (E1) B - W-B Power source of crankshaft position sensor Ignition switch ON 4.5 to 5.5 V
B23-78 (NE+) - B23-110 (NE-) P - Y Crankshaft position sensor Idling with warm engine

Pulse generation

(See waveform 2)
B23-82 (VV1+) - B23-114 (VV1-) V - P Camshaft position sensor (for intake camshaft) Idling with warm engine

Pulse generation

(See waveform 3)
B23-80 (EV1+) - B23-112 (EV1-) GR - G Camshaft position sensor (for exhaust camshaft) Idling with warm engine

Pulse generation

(See waveform 3)
B23-20 (#10) - B23-51 (E01) B - BR Fuel injector assembly Ignition switch ON 11 to 14 V
B23-17 (#20) - B23-51 (E01) GR - BR
B23-18 (#30) - B23-51 (E01) P - BR Idling

Pulse generation

(See waveform 4)
B23-19 (#40) - B23-51 (E01) L - BR
B23-23 (HA1A) - B23-52 (E04) G - W-B Air fuel ratio sensor heater (bank 1 sensor 1) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 5)
B23-133 (A1A+) - B23-16 (E1) R - W-B Air fuel ratio sensor (bank 1 sensor 1) Ignition switch ON 3.3 V*1
B23-134 (A1A-) - B23-16 (E1) G - W-B Air fuel ratio sensor (bank 1 sensor 1) Ignition switch ON 2.9 V*1
B23-22 (HT1B) - B23-16 (E1) L - W-B Heated oxygen sensor heater (bank 1 sensor 2) Ignition switch ON 11 to 14 V
Idling Below 3.0 V
B23-103 (OX1B) - B23-135 (EX1B) W - R Heated oxygen sensor (bank 1 sensor 2) Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

Pulse generation

(See waveform 6)
B23-123 (KNK1) - B23-124 (EKNK) R - G Knock sensor Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See waveform 7)
A58-44 (SPD) - B23-16 (E1) V - W-B Speed signal from combination meter Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 8)
B23-93 (THW) - B23-94 (ETHW) V - BR Engine coolant temperature sensor Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
B23-90 (THA) - B23-122 (ETHA) P - G Intake air temperature sensor (built into mass air flow meter) Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
B23-91 (VG) - B23-92 (E2G) GR - L Mass air flow meter Idling, Shift lever position P or N (neutral), air conditioner OFF 0.5 to 3.0 V
B23-118 (VCPM) - B23-119 (EPIM) Y - LG Power source of manifold absolute pressure sensor Ignition switch ON 4.5 to 5.5 V
B23-87 (PIM) - B23-119 (EPIM) B - LG Manifold absolute pressure sensor Idling 1.2 to 2.0 V
A58-27 (W) - B23-16 (E1) B - W-B MIL Ignition switch ON (MIL goes off) Below 1.5 V
Idling 11 to 14 V
B23-63 (NSW) - B23-16 (E1) BE - W-B

Clutch start switch signal*2

Park/Neutral position switch signal*3

 Ignition switch ON (clutch pedal fully depressed)*2 Below 3.0 V
Ignition switch ON (clutch pedal released)*2 11 to 14 V
Ignition switch ON (shift lever in P, N)*3 Below 3.0 V
Ignition switch ON (shift lever not in P, N)*3 11 to 14 V
Cranking 6 to 13 V
A58-22 (STA) - B23-16 (E1) BR - W-B Starter signal Ignition switch ON Below 1.5 V
Cranking 5.5 V or more
B23-84 (VTA1) - B23-116 (ETA) Y - V Throttle position sensor (for engine control) Ignition switch ON, Throttle valve fully closed 0.5 to 1.1 V
Ignition switch ON, Throttle valve fully open 3.2 to 4.8 V
B23-83 (VTA2) - B23-116 (ETA) GR - V Throttle position sensor (for sensor malfunction detection) Ignition switch ON, Throttle valve fully closed 2.1 to 3.1 V
Ignition switch ON, Throttle valve fully open 4.6 to 5.0 V
B23-115 (VCTA) - B23-116 (ETA) W - V Power source of throttle position sensor (fixed voltage) Ignition switch ON 4.5 to 5.5 V
A58-53 (VCPA) - A58-52 (EPA) G - V Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
A58-51 (VPA) - A58-52 (EPA) R - V Accelerator pedal position sensor (for engine control) Ignition switch ON, Accelerator pedal released 0.5 to 1.1 V
Ignition switch ON, Accelerator pedal fully depressed 2.5 to 4.5 V
A58-54 (VPA2) - A58-55 (EPA2) L - B Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, Accelerator pedal released 1.2 to 2.0 V
Ignition switch ON, Accelerator pedal fully depressed 3.4 to 4.7 V
A58-56 (VCP2) - A58-55 (EPA2) W - B Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
B23-60 (M+) - B23-59 (ME01) G - BR Throttle actuator Idling with warm engine

Pulse generation

(See waveform 9)
B23-30 (M-) - B23-59 (ME01) BR - BR Throttle actuator Idling with warm engine

Pulse generation

(See waveform 10)
A58-9 (STP) - B23-16 (E1) LG - W-B Stop light switch Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
A58-10 (ST1-) - B23-16 (E1) Y - W-B Stop light switch Ignition switch ON, Brake pedal depressed Below 1.5 V
Ignition switch ON, Brake pedal released 7.5 to 14 V
B23-76 (PRG) - B23-16 (E1) L - W-B Purge VSV Ignition switch ON 11 to 14 V
Idling, under purge control

Pulse generation

(See waveform 11)
A58-21 (FC) - B23-16 (E1) V - W-B Fuel pump control Ignition switch ON 11 to 14 V
Idling Below 1.5 V
A58-23 (TC) - B23-16 (E1) L - W-B Terminal TC of DLC3 Ignition switch ON 11 to 14 V
B23-75 (OC1+) - B23-74 (OC1-) BR - Y Camshaft timing oil control valve (for intake camshaft) Idling

Pulse generation

(See waveform 12)
B23-65 (OE1+) - B23-64 (OE1-) L - W Camshaft timing oil control valve (for exhaust camshaft) Idling

Pulse generation

(See waveform 13)
A58-13 (CANH) - B23-16 (E1) L - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 14)
A58-26 (CANL) - B23-16 (E1) W - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 15)
A58-12 (CANP) - B23-16 (E1) B - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 14)
A58-25 (CANN) - B23-16 (E1) W - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 15)
A58-37 (IGSW) - B23-16 (E1) R - W-B Ignition switch Ignition switch ON 11 to 14 V
A58-46 (MREL) - B23-16 (E1) GR - W-B EFI MAIN relay Ignition switch ON 11 to 14 V
B23-113 (VCV1) - B23-16 (E1) R - W-B Power source for camshaft position sensor (for intake camshaft) Ignition switch ON 4.5 to 5.5 V
B23-111 (VCE1) - B23-16 (E1) L - W-B Power source for camshaft position sensor (for exhaust camshaft) Ignition switch ON 4.5 to 5.5 V
B23-81 (D) - B23-16 (E1) L - W-B

No. 2 Clutch start switch signal*2

Park/Neutral position switch signal*3

 Ignition switch ON, clutch pedal depressed*2 Below 1.0 V
Ignition switch ON, clutch pedal released*2 11 to 14 V
Ignition switch ON (shift lever in D)*3 11 to 14 V
Ignition switch ON (shift lever not in D)*3 Below 1.0 V
B23-79 (R) - B23-16 (E1) R - W-B

Back-up light switch signal*2

Park/Neutral position switch signal*3

 Back-up light switch on*2 11 to 14 V
Back-up light switch off*2 Below 1.0 V
Ignition switch ON (shift lever in R)*3 11 to 14 V
Ignition switch ON (shift lever not in R)*3 Below 1.0 V
B23-28 (EGR1) - B23-16 (E1) R - W-B EGR valve assembly Engine racing with warm engine

Pulse generation

(See waveform 16)
B23-27 (EGR2) - B23-16 (E1) LG - W-B EGR valve assembly Engine racing with warm engine

Pulse generation

(See waveform 17)
B23-26 (EGR3) - B23-16 (E1) W - W-B EGR valve assembly Engine racing with warm engine

Pulse generation)

(See waveform 16)
B23-25 (EGR4) - B23-16 (E1) Y - W-B EGR valve assembly Engine racing with warm engine

Pulse generation

(See waveform 17)
A58-30 (NEO) - B23-16 (E1) V - W-B Crankshaft position sensor signal Idling with warm engine

Pulse generation

(See waveform 18)
A58-31 (TACH) - B23-16 (E1) LG - W-B Engine speed Idling

Pulse generation

(See waveform 19)
A58-4 (ELS1) - B23-16 (E1) G - W-B Electric load Tail light switch on 11 to 14 V
Tail light switch off Below 1.5 V
A58-17 (ELS2) - B23-16 (E1) B - W-B Electric load Defogger switch on 11 to 14 V
Defogger switch off Below 1.5 V
A58-7 (FANL) - B23-16 (E1) R - W-B FAN NO. 1 relay Ignition switch ON 11 to 14 V

Idling with A/C ON or

High engine coolant temperature

 Below 1.5 V
A58-8 (FANH) - B23-16 (E1) G - W-B FAN NO. 2 relay Idling with high engine coolant temperature Below 1.5 V

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

*2: for Manual Transaxle

*3: for CVT


  1. WAVEFORM 1

    A01VFQFE01
    *a 2 V/DIV.
    *b 20 ms./DIV.
    Igniter IGT Signal (from ECM to Igniter)
    ECM Terminal Name Between IGT (1 to 4) and E1
    Tester Range 2 V/DIV., 20 ms./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  2. WAVEFORM 2

    A01VJJRE01
    *a 2 V/DIV.
    *b 20 ms./DIV.
    Crankshaft Position Sensor Signal
    ECM Terminal Name Between NE+ and NE-
    Tester Range 2 V/DIV., 20 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  3. WAVEFORM 3

    A01VH40E09
    *a 5 V/DIV.
    *b 20 ms./DIV.
    Camshaft Position Sensor Signal
    ECM Terminal Name

    CH1: Between VV1+ and VV1-

    CH2: Between EV1+ and EV1-
    Tester Range 5 V/DIV., 20 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  4. WAVEFORM 4

    A01VJ9VE02
    *1 20 V/DIV.
    *2 20 ms./DIV.
    Fuel Injector Assembly Signal
    ECM Terminal Name Between #10 (to #40) and E01
    Tester Range 20 V/DIV., 20 ms./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  5. WAVEFORM 5

    A01VGXWE01
    *a 5 V/DIV.
    *b 10 ms./DIV.
    Air Fuel Ratio Sensor Heater (Bank 1 Sensor 1) Signal
    ECM Terminal Name Between HA1A and E04
    Tester Range 5 V/DIV., 10 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The duty ratio varies depending on the engine driving condition.

  6. WAVEFORM 6

    A01VKF8E08
    *1 0.2 V/DIV.
    *2 200 ms./DIV.
    Heated Oxygen Sensor (Bank 1 Sensor 2) Signal
    ECM Terminal Name Between OX1B and EX1B
    Tester Range 0.2 V/DIV., 200 ms./DIV.
    Condition Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

    Tech Tips

    In the Data List, the item O2S B1 S2 shows the values input to the ECM from the heated oxygen sensor.

  7. WAVEFORM 7

    A01VHSSE04
    *a 1 V/DIV.
    *b 1 ms./DIV.
    Knock Sensor Signal
    ECM Terminal Name Between KNK1 and EKNK
    Tester Range 1 V/DIV., 1 ms./DIV.
    Condition Engine speed maintained at 4000 rpm after warming up engine

    Tech Tips


    • The wavelength becomes shorter as the engine speed increases.

    • The waveforms and amplitudes displayed differ slightly depending on the vehicle.

  8. WAVEFORM 8

    A01VLP8E03
    *a 5 V/DIV.
    *b 20 ms./DIV.
    Vehicle Speed Signal
    ECM Terminal Name Between SPD and E1
    Tester Range 5 V/DIV., 20 ms./DIV.
    Condition Driving at 20 km/h (12 mph)

    Tech Tips

    The wavelength becomes shorter as the vehicle speed increases.

  9. WAVEFORM 9

    A01VE9GE03
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Throttle Actuator Positive Terminal Signal
    ECM Terminal Name Between M+ and ME01
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The duty ratio varies depending on the throttle actuator operation.

  10. WAVEFORM 10

    A01VEUQE02
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Throttle Actuator Negative Terminal Signal
    ECM Terminal Name Between M- and ME01
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The duty ratio varies depending on the throttle actuator operation.

  11. WAVEFORM 11

    A01VINGE01
    *1 10 V/DIV.
    *2 20 ms./DIV.
    Purge VSV Signal
    ECM Terminal Name Between PRG and E1
    Tester Range 10 V/DIV., 20 ms./DIV.
    Condition Idling, under purge control

    Tech Tips

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

  12. WAVEFORM 12

    A01VENQE04
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Camshaft Timing Oil Control Valve Assembly for Intake Camshaft Signal
    ECM Terminal Name Between OC1+ and OC1-
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling

  13. WAVEFORM 13

    A01VENQE04
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Camshaft Timing Oil Control Valve Assembly for Exhaust Camshaft Signal
    ECM Terminal Name Between OE1+ and OE1-
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling

  14. WAVEFORM 14

    A01VDPFE01
    *a 1 V/DIV.
    *b 10 μs./DIV.
    CAN Communication Signal (Reference)
    ECM Terminal Name

    Between CANH and E1

    Between CANP and E1
    Tester Range 1 V/DIV., 10 μs./DIV.
    Condition Ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  15. WAVEFORM 15

    A01VJAKE01
    *a 1 V/DIV.
    *b 10 μs./DIV.
    CAN Communication Signal (Reference)
    ECM Terminal Name

    Between CANL and E1

    Between CANN and E1
    Tester Range 1 V/DIV., 10 μs./DIV.
    Condition Ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  16. WAVEFORM 16

    A01VIC1E08
    *1 10 V/DIV.
    *2 20 ms./DIV.
    EGR Valve Signal
    ECM Terminal Name

    CH1: Between EGR 1 and E1

    CH2: Between EGR 3 and E1
    Tester Range 10 V/DIV., 20 ms./DIV.
    Condition Engine racing with warm engine

  17. WAVEFORM 17

    A01VI4GE08
    *1 10 V/DIV.
    *2 20 ms./DIV.
    EGR Valve Signal
    ECM Terminal Name

    CH1: Between EGR 2 and E1

    CH2: Between EGR 4 and E1
    Tester Range 10 V/DIV., 20 ms./DIV.
    Condition Engine racing with warm engine

  18. WAVEFORM 18

    A01VHG9E01
    *a 1 V/DIV.
    *b 2 ms./DIV.
    Crankshaft Position Sensor Signal
    ECM Terminal Name Between NEO and E1
    Tester Range 1 V/DIV., 2 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  19. WAVEFORM 19

    A01VLP8E01
    *a 5 V/DIV.
    *b 10 ms./DIV.
    Engine Speed Signal
    ECM Terminal Name Between TACH and E1
    Tester Range 5 V/DIV., 10 ms./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.