SFI SYSTEM TERMINALS OF ECM

A004BK7C04
*A for LHD *B for RHD

Tech Tips

The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as 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) - B112-59 (E1) Y - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
A58-2 (+B) - B112-59 (E1) B - W-B Power source of ECM Ignition switch ON 11 to 14 V
A58-3 (+B2) - B112-59 (E1) B - W-B Power source of ECM Ignition switch ON 11 to 14 V
A58-5 (ELS1) - B112-59 (E1) G - W-B Electric load signal Taillight switch on 11 to 14 V
Taillight switch off Below 1.5 V
A58-6 (IGSW) - B112-59 (E1) R - W-B Ignition switch signal Ignition switch ON 11 to 14 V
A58-7 (FANL) - B112-59 (E1) R - W-B Cooling fan relay Ignition switch ON (cooling fan not operated) 11 to 14 V
Idling with A/C on, or high engine coolant temperature (cooling fan operated) Below 1.5 V
A58-8 (FANH) - B112-59 (E1) G - W-B No. 2 cooling fan relay Ignition switch ON (cooling fan not operated) 11 to 14 V
Idling with high engine coolant temperature (cooling fan operated at high speed) Below 1.5 V
A58-9 (STP) - B112-59 (E1) LG - W-B Stop light switch assembly signal Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
A58-10 (ST1-) - B112-59 (E1) Y - W-B

Stop light switch assembly signal

(opposite of voltage at STP terminal)

 Ignition switch ON, brake pedal depressed Below 1.5 V
Ignition switch ON, brake pedal released 7.5 to 14 V
A58-13 (CANH) - B112-59 (E1) L - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 1)
A58-18 (INH) - B112-59 (E1) L - W-B Wiper switch signal Front wiper motor in HI operation 11 to 14 V
Front wiper motor off Below 1.5 V
A58-23 (NSW) - B112-59 (E1) BE - W-B Park/Neutral position switch signal*4 Ignition switch ON, shift lever in P or N (neutral) Below 3.0 V
Ignition switch ON, shift lever not in P or N (neutral) 11 to 14 V
Clutch start switch signal*5 Ignition switch ON, clutch pedal fully released 11 to 14 V
Ignition switch ON, clutch pedal fully depressed Below 1.5 V
A58-26 (CANL) - B112-59 (E1) W - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 2)
A58-27 (W) - B112-59 (E1) B - W-B MIL Ignition switch ON (MIL goes off) Below 1.5 V
Idling 11 to 14 V
A58-28 (IMI) - B112-59 (E1) G - W-B ID code box (immobiliser code ECU) communication input Ignition switch off 11 to 14 V
A58-29 (STA) - B112-59 (E1)

L - W-B*4

BR - W-B*5

 Starter assembly signal Cranking 5.5 V or higher
A58-30 (NEO)*1 - B112-59 (E1) V - W-B Engine speed signal sent to other ECUs Idling with warm engine

Pulse generation

(See waveform 3)
A58-31 (TACH) - B112-59 (E1) LG - W-B Engine speed signal Idling with warm engine

Pulse generation

(See waveform 4)
A58-32 (EC) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
A58-33 (TC) - B112-59 (E1) L - W-B Terminal TC of DLC3 Ignition switch ON 11 to 14 V
A58-34 (ELS2) - B112-59 (E1) B - W-B Electric load signal Defogger switch on 11 to 14 V
Defogger switch off Below 1.5 V
A58-39 (PBV) - B112-59 (E1) L - W-B Brake ejector VSV operation signal Ignition switch ON 11 to 14 V
A58-40 (PB) - A58-54 (EPB) LG - R Vacuum sensor signal Idling with warm engine, brake pedal released 1.5 to 2.0 V
A58-41 (FPC) - B112-59 (E1) L - W-B Fuel pump control Engine stopped and ignition switch ON (fuel pump not operate) 11 to 14 V
Engine stopped and ignition switch ON (fuel pump operate) Below 1.5 V
A58-44 (SPD) - B112-59 (E1) V - W-B Vehicle speed signal from combination meter assembly signal Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 5)
A58-45 (IMO) - B112-59 (E1) W - W-B ID code box (immobiliser code ECU) communication output Ignition switch off 11 to 14 V
A58-46 (MREL) - B112-59 (E1) GR - W-B EFI MAIN relay operation signal Ignition switch ON 11 to 14 V
A58-47 (VPA) - A58-48 (EPA) R - V Accelerator pedal position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
Ignition switch ON, accelerator pedal fully depressed 2.6 to 4.5 V
A58-49 (VCPA) - A58-48 (EPA) G - V Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
A58-50 (VPA2) - A58-51 (EPA2) L - B Accelerator pedal position sensor signal Ignition switch ON, accelerator pedal fully released 1.2 to 2.0 V
Ignition switch ON, accelerator pedal fully depressed 3.4 to 4.75 V
A58-52 (VCP2) - A58-51 (EPA2) W - B Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
A58-55 (VCPB) - A58-54 (EPB) G - R Power source of vacuum sensor (for PB) Ignition switch ON 4.75 to 5.25 V
B112-26 (E04) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B112-27 (HA1A) - B112-26 (E04) G - W-B Air fuel ratio sensor heater operation signal Idling with cold engine

Pulse generation

(See waveform 6)
Ignition switch ON 11 to 14 V
B112-28 (ME01) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B112-29 (+BM) - B112-59 (E1) GR - W-B Power source of throttle actuator Always 11 to 14 V
B112-30 (M-) - B112-28 (ME01) BR - BR Throttle actuator operation signal (negative terminal) Idling with warm engine

Pulse generation

(See waveform 7)
B112-33 (PRG) - B112-59 (E1) L - W-B Purge VSV operation signal Ignition switch ON 11 to 14 V
Idling, under purge control

Pulse generation

(See waveform 8)
B112-35 (EDT1) - B112-59 (E1) G - W-B Cam timing control motor signal Idling with warm engine

Pulse generation

(See waveform 9)
B112-37 (OE1+) - B112-36 (OE1-) L - P Camshaft timing oil control valve assembly operation signal Idling with warm engine

Pulse generation

(See waveform 10)
B112-56 (HT1B) - B112-59 (E1) L - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
Ignition switch ON 11 to 14 V
B112-57 (E01) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B112-58 (E02) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B112-59 (E1) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B112-60 (M+) - B112-28 (ME01) G - BR Throttle actuator operation signal (positive terminal) Idling with warm engine

Pulse generation

(See waveform 11)
B112-66 (EMF1) - B112-59 (E1) W - W-B Cam timing control motor signal Idling with warm engine 0.3 to 1.3 V
B112-71 (EMR1) - B112-59 (E1) GR - W-B Cam timing control motor signal Idling with warm engine

Pulse generation

(See waveform 12)
B112-72 (IGT4) - B112-59 (E1) LG - W-B No. 1 ignition coil (No. 4 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B112-73 (IGT3) - B112-59 (E1) G - W-B No. 1 ignition coil (No. 3 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B112-74 (IGT2) - B112-59 (E1) V - W-B No. 1 ignition coil (No. 2 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B112-75 (IGT1) - B112-59 (E1) W - W-B No. 1 ignition coil (No. 1 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B112-77 (VCPM) - B112-76 (EPIM) Y - LG Power source of vacuum sensor (manifold absolute pressure sensor) Ignition switch ON 4.5 to 5.5 V
B112-78 (PIM) - B112-76 (EPIM) B - LG Vacuum sensor (manifold absolute pressure sensor) signal Idling with warm engine 1.2 to 2.0 V
B112-79 (PTO) - B112-109 (EPTO)*4 L - BE Oil pressure sensor signal Engine idling with shift lever in P or N (neutral) 0.8 to 1.2 V
B112-80 (VV1+) - B112-112 (VV1-) V - P Camshaft position sensor (for intake camshaft) signal Idling with warm engine

Pulse generation

(See waveform 14)
B112-81 (VCNE) - B112-113 (NE-) B - Y Power source of crankshaft position sensor Ignition switch ON 4.5 to 5.5 V
B112-82 (EV1+) - B112-115 (EV1-) GR - W Camshaft position sensor (for exhaust camshaft) signal Idling with warm engine

Pulse generation

(See waveform 14)
B112-84 (VHAC) - B112-83 (EHAC)*3 V - G Atmospheric pressure sensor power supply

  • Ignition switch ON

  • Engine stopped

 4.5 to 5.5 V
B112-85 (HAC) - B112-83 (EHAC)*3 L - G Atmospheric pressure sensor signal

  • Ignition switch ON

  • Absolute pressure of 40 kPa (0.4 kgf/cm2, 5.8 psi) applied to atmospheric pressure sensor.

 1.6 to 2.0 V

  • Ignition switch ON

  • Absolute pressure of 60 kPa (0.6 kgf/cm2, 8.7 psi) applied to atmospheric pressure sensor.

 2.2 to 2.6 V

  • Ignition switch ON

  • Atmospheric pressure applied to atmospheric pressure sensor.

 3.4 to 3.8 V
B112-86(IB) - B112-118 (EIB) *3 L - V Battery state sensor assembly Ignition switch ON 0.2 to 4.8 V
B112-87(THB) - B112-118 (EIB) *3 SB - V Battery temperature sensor (built into battery state sensor assembly) Ignition switch off 0.2 to 4.8 V
B112-110 (VCPT) - B112-109 (EPTO)*4 V - BE Power supply for oil pressure sensor Ignition switch ON 4.75 to 5.25 V
B112-117 (VCIB) - B112-118 (EIB)*3 P - V Power source of battery state sensor assembly Ignition switch ON 4.5 to 5.5 V
B112-94 (EMD1) - B112-59 (E1) V - W-B Cam timing control motor signal Idling with warm engine

Pulse generation

(See waveform 15)
B112-95 (#20) - B112-57 (E01) GR - BR Fuel injector assembly (No. 2 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B112-96 (#30) - B112-57 (E01) P - BR Fuel injector assembly (No. 3 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B112-97 (#40) - B112-57 (E01) L - BR Fuel injector assembly (No. 4 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B112-98 (#10) - B112-57 (E01) B - BR Fuel injector assembly (No. 1 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B112-99 (OX1B) - B112-131 (EX1B) W - R Heated oxygen sensor signal Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

Pulse generation

(See waveform 17)
B112-100 (A1A+) - B112-59 (E1) R - W-B Air fuel ratio sensor signal Ignition switch ON 3.0 to 3.6 V
B112-101 (VTA2) - B112-133 (ETA) GR - V Throttle position sensor signal (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 2.1 to 3.1 V
Ignition switch ON, accelerator pedal fully depressed 4.6 to 5.0 V
B112-105 (EGR4) - B112-59 (E1) Y - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 18)
B112-106 (EGR2) - B112-59 (E1) LG - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 18)
B112-107 (EGR3) - B112-59 (E1) W - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 19)
B112-108 (GE01) - Body ground BR - Body ground Shielded earth (ground) circuit of throttle actuator Always Below 1 Ω
B112-111 (VCV1) - B112-112 (VV1-) R - P Power source of camshaft position sensor (for intake camshaft) (specific voltage) Ignition switch ON 4.5 to 5.5 V
B112-114 (NE+) - B112-113 (NE-) P - Y Crankshaft position sensor signal Idling with warm engine

Pulse generation

(See waveform 20)
B112-116 (VCE1) - B112-115 (EV1-) L - W Power source of camshaft position sensor (for exhaust camshaft) (specific voltage) Ignition switch ON 4.5 to 5.5 V
B112-120 (THW) - B112-119 (ETHW) V - BR Engine coolant temperature sensor signal Idling, engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
B112-122 (KNK1) - B112-121 (EKNK) R - G Knock sensor signal Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See waveform 21)
B112-132 (A1A-) - B112-59 (E1) G - W-B Air fuel ratio sensor signal Ignition switch ON 2.7 to 3.3 V
B112-134 (VCTA) - B112-133 (ETA) W - V Power source of throttle position sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
B112-135 (VTA1) - B112-133 (ETA) Y - V Throttle position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
Ignition switch ON, accelerator pedal fully depressed 3.2 to 4.8 V
B112-137 (VG) - B112-104 (E2G) GR - L Mass air flow meter signal Idling, shift lever in P or N (neutral), A/C switch off 0.5 to 3.0 V
B112-138 (THA) - B112-139 (ETHA) P - G Intake air temperature sensor signal Idling, intake air temperature 20°C (68°F) 0.5 to 3.4 V
B112-140 (EGR1) - B112-59 (E1) R - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 19)
for RHD
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
A58-1 (BATT) - B118-59 (E1) Y - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
A58-2 (+B) - B118-59 (E1) B - W-B Power source of ECM Ignition switch ON 11 to 14 V
A58-3 (+B2) - B118-59 (E1) B - W-B Power source of ECM Ignition switch ON 11 to 14 V
A58-5 (ELS1) - B118-59 (E1) G - W-B Electric load signal Taillight switch on 11 to 14 V
Taillight switch off Below 1.5 V
A58-6 (IGSW) - B118-59 (E1) R - W-B Ignition switch signal Ignition switch ON 11 to 14 V
A58-7 (FANL) - B118-59 (E1) R - W-B Cooling fan relay Ignition switch ON (cooling fan not operated) 11 to 14 V
Idling with A/C on, or high engine coolant temperature (cooling fan operated) Below 1.5 V
A58-8 (FANH) - B118-59 (E1) G - W-B No. 2 cooling fan relay Ignition switch ON (cooling fan not operated) 11 to 14 V
Idling with high engine coolant temperature (cooling fan operated at high speed) Below 1.5 V
A58-9 (STP) - B118-59 (E1) LG - W-B Stop light switch assembly signal Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
A58-10 (ST1-) - B118-59 (E1) Y - W-B

Stop light switch assembly signal

(opposite of voltage at STP terminal)

 Ignition switch ON, brake pedal depressed Below 1.5 V
Ignition switch ON, brake pedal released 7.5 to 14 V
A58-13 (CANH) - B118-59 (E1) L - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 1)
A58-18 (INH) - B118-59 (E1) L - W-B Wiper switch signal Front wiper motor in HI operation 11 to 14 V
Front wiper motor off Below 1.5 V
A58-23 (NSW) - B118-59 (E1) BE - W-B Park/Neutral position switch signal*4 Ignition switch ON, shift lever in P or N (neutral) Below 3.0 V
Ignition switch ON, shift lever not in P or N (neutral) 11 to 14 V
Clutch start switch signal*5 Ignition switch ON, clutch pedal fully released 11 to 14 V
Ignition switch ON, clutch pedal fully depressed Below 1.5 V
A58-26 (CANL) - B118-59 (E1) W - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 2)
A58-27 (W) - B118-59 (E1) B - W-B MIL Ignition switch ON (MIL goes off) Below 1.5 V
Idling 11 to 14 V
A58-28 (IMI) - B118-59 (E1) G - W-B ID code box (immobiliser code ECU) communication input Ignition switch off 11 to 14 V
A58-29 (STA) - B118-59 (E1)

L - W-B*4

BR - W-B*5

 Starter assembly signal Cranking 5.5 V or higher
A58-30 (NEO)*1 - B118-59 (E1) V - W-B Engine speed signal sent to other ECUs Idling with warm engine

Pulse generation

(See waveform 3)
A58-31 (TACH) - B118-59 (E1) LG - W-B Engine speed signal Idling with warm engine

Pulse generation

(See waveform 4)
A58-32 (EC) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
A58-33 (TC) - B118-59 (E1) L - W-B Terminal TC of DLC3 Ignition switch ON 11 to 14 V
A58-34 (ELS2) - B118-59 (E1) B - W-B Electric load signal Defogger switch on 11 to 14 V
Defogger switch off Below 1.5 V
A58-39 (PBV) - B118-59 (E1) L - W-B Brake ejector VSV operation signal Ignition switch ON 11 to 14 V
A58-40 (PB) - A58-54 (EPB) LG - R Vacuum sensor signal Idling with warm engine, brake pedal released 1.5 to 2.0 V
A58-41 (FPC) - B118-59 (E1) L - W-B Fuel pump control Engine stopped and ignition switch ON (fuel pump not operate) 11 to 14 V
Engine stopped and ignition switch ON (fuel pump operate) Below 1.5 V
A58-44 (SPD) - B118-59 (E1) V - W-B Vehicle speed signal from combination meter assembly signal Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 5)
A58-45 (IMO) - B118-59 (E1) W - W-B ID code box (immobiliser code ECU) communication output Ignition switch off 11 to 14 V
A58-46 (MREL) - B118-59 (E1) GR - W-B EFI MAIN relay operation signal Ignition switch ON 11 to 14 V
A58-47 (VPA) - A58-48 (EPA) R - V Accelerator pedal position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
Ignition switch ON, accelerator pedal fully depressed 2.6 to 4.5 V
A58-49 (VCPA) - A58-48 (EPA) G - V Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
A58-50 (VPA2) - A58-51 (EPA2) L - B Accelerator pedal position sensor signal Ignition switch ON, accelerator pedal fully released 1.2 to 2.0 V
Ignition switch ON, accelerator pedal fully depressed 3.4 to 4.75 V
A58-52 (VCP2) - A58-51 (EPA2) W - B Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
A58-55 (VCPB) - A58-54 (EPB) G - R Power source of vacuum sensor (for PB) Ignition switch ON 4.75 to 5.25 V
B118-26 (E04) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B118-27 (HA1A) - B118-26 (E04) G - W-B Air fuel ratio sensor heater operation signal Idling with cold engine

Pulse generation

(See waveform 6)
Ignition switch ON 11 to 14 V
B118-28 (ME01) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B118-29 (+BM) - B118-59 (E1) GR - W-B Power source of throttle actuator Always 11 to 14 V
B118-30 (M-) - B118-28 (ME01) BR - BR Throttle actuator operation signal (negative terminal) Idling with warm engine

Pulse generation

(See waveform 7)
B118-33 (PRG) - B118-59 (E1) L - W-B Purge VSV operation signal Ignition switch ON 11 to 14 V
Idling, under purge control

Pulse generation

(See waveform 8)
B118-35 (EDT1) - B118-59 (E1) G - W-B Cam timing control motor signal Idling with warm engine

Pulse generation

(See waveform 9)
B118-37 (OE1+) - B118-36 (OE1-) L - P Camshaft timing oil control valve assembly operation signal Idling with warm engine

Pulse generation

(See waveform 10)
B118-56 (HT1B) - B118-59 (E1) L - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
Ignition switch ON 11 to 14 V
B118-57 (E01) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B118-58 (E02) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B118-59 (E1) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω
B118-60 (M+) - B118-28 (ME01) G - BR Throttle actuator operation signal (positive terminal) Idling with warm engine

Pulse generation

(See waveform 11)
B118-66 (EMF1) - B118-59 (E1) W - W-B Cam timing control motor signal Idling with warm engine 0.3 to 1.3 V
B118-71 (EMR1) - B118-59 (E1) GR - W-B Cam timing control motor signal Idling with warm engine

Pulse generation

(See waveform 12)
B118-72 (IGT4) - B118-59 (E1) LG - W-B No. 1 ignition coil (No. 4 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B118-73 (IGT3) - B118-59 (E1) G - W-B No. 1 ignition coil (No. 3 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B118-74 (IGT2) - B118-59 (E1) V - W-B No. 1 ignition coil (No. 2 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B118-75 (IGT1) - B118-59 (E1) W - W-B No. 1 ignition coil (No. 1 cylinder) signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 13)
B118-77 (VCPM) - B118-76 (EPIM) Y - LG Power source of vacuum sensor (manifold absolute pressure sensor) Ignition switch ON 4.5 to 5.5 V
B118-78 (PIM) - B118-76 (EPIM) B - LG Vacuum sensor (manifold absolute pressure sensor) signal Idling with warm engine 1.2 to 2.0 V
B118-79 (PTO) - B118-109 (EPTO)*4 L - BE Oil pressure sensor signal Engine idling with shift lever in P or N (neutral) 0.8 to 1.2 V
B118-80 (VV1+) - B118-112 (VV1-) V - P Camshaft position sensor (for intake camshaft) signal Idling with warm engine

Pulse generation

(See waveform 14)
B118-81 (VCNE) - B118-113 (NE-) B - Y Power source of crankshaft position sensor Ignition switch ON 4.5 to 5.5 V
B118-82 (EV1+) - B118-115 (EV1-) GR - W Camshaft position sensor (for exhaust camshaft) signal Idling with warm engine

Pulse generation

(See waveform 14)
B118-84 (VHAC) - B118-83 (EHAC) V - G Atmospheric pressure sensor power supply

  • Ignition switch ON

  • Engine stopped

 4.5 to 5.5 V
B118-85 (HAC) - B118-83 (EHAC) L - G Atmospheric pressure sensor signal

  • Ignition switch ON

  • Absolute pressure of 40 kPa (0.4 kgf/cm2, 5.8 psi) applied to atmospheric pressure sensor.

 1.6 to 2.0 V

  • Ignition switch ON

  • Absolute pressure of 60 kPa (0.6 kgf/cm2, 8.7 psi) applied to atmospheric pressure sensor.

 2.2 to 2.6 V

  • Ignition switch ON

  • Atmospheric pressure applied to atmospheric pressure sensor.

 3.4 to 3.8 V
B118-86(IB) - B118-118 (EIB) L - V Battery current sensor assembly Ignition switch ON 0.2 to 4.8 V
B118-87(THB) - B118-118 (EIB) SB - V Battery temperature sensor (built into battery current sensor assembly) Ignition switch off 0.2 to 4.8 V
B118-110 (VCPT) - B118-109 (EPTO)*4 V - BE Power supply for oil pressure sensor Ignition switch ON 4.75 to 5.25 V
B118-117 (VCIB) - B118-118 (EIB) P - V Power source of battery current sensor assembly Ignition switch ON 4.5 to 5.5 V
B118-94 (EMD1) - B118-59 (E1) V - W-B Cam timing control motor signal Idling with warm engine

Pulse generation

(See waveform 15)
B118-95 (#20) - B118-57 (E01) GR - BR Fuel injector assembly (No. 2 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B118-96 (#30) - B118-57 (E01) P - BR Fuel injector assembly (No. 3 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B118-97 (#40) - B118-57 (E01) L - BR Fuel injector assembly (No. 4 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B118-98 (#10) - B118-57 (E01) B - BR Fuel injector assembly (No. 1 cylinder) Ignition switch ON 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 16)
B118-99 (OX1B) - B118-131 (EX1B) W - R Heated oxygen sensor signal Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

Pulse generation

(See waveform 17)
B118-100 (A1A+) - B118-59 (E1) R - W-B Air fuel ratio sensor signal Ignition switch ON 3.0 to 3.6 V
B118-101 (VTA2) - B118-133 (ETA) GR - V Throttle position sensor signal (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 2.1 to 3.1 V
Ignition switch ON, accelerator pedal fully depressed 4.6 to 5.0 V
B118-105 (EGR4) - B118-59 (E1) Y - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 18)
B118-106 (EGR2) - B118-59 (E1) LG - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 18)
B118-107 (EGR3) - B118-59 (E1) W - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 19)
B118-108 (GE01) - Body ground BR - Body ground Shielded earth (ground) circuit of throttle actuator Always Below 1 Ω
B118-111 (VCV1) - B118-112 (VV1-) R - P Power source of camshaft position sensor (for intake camshaft) (specific voltage) Ignition switch ON 4.5 to 5.5 V
B118-114 (NE+) - B118-113 (NE-) P - Y Crankshaft position sensor signal Idling with warm engine

Pulse generation

(See waveform 20)
B118-116 (VCE1) - B118-115 (EV1-) L - W Power source of camshaft position sensor (for exhaust camshaft) (specific voltage) Ignition switch ON 4.5 to 5.5 V
B118-120 (THW) - B118-119 (ETHW) V - BR Engine coolant temperature sensor signal Idling, engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
B118-122 (KNK1) - B118-121 (EKNK) R - G Knock sensor signal Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See waveform 21)
B118-132 (A1A-) - B118-59 (E1) G - W-B Air fuel ratio sensor signal Ignition switch ON 2.7 to 3.3 V
B118-134 (VCTA) - B118-133 (ETA) W - V Power source of throttle position sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
B118-135 (VTA1) - B118-133 (ETA) Y - V Throttle position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
Ignition switch ON, accelerator pedal fully depressed 3.2 to 4.8 V
B118-137 (VG) - B118-104 (E2G) GR - L Mass air flow meter signal Idling, shift lever in P or N (neutral), A/C switch off 0.5 to 3.0 V
B118-138 (THA) - B118-139 (ETHA) P - G Intake air temperature sensor signal Idling, intake air temperature 20°C (68°F) 0.5 to 3.4 V
B118-140 (EGR1) - B118-59 (E1) R - W-B EGR valve operation signal Engine racing with warm engine

Pulse generation

(See waveform 19)


  1. WAVEFORM 1

    A004AYME20
    CAN Communication Signal (Reference)
    ECM Terminal Name Between CANH 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.

  2. WAVEFORM 2

    A004BJWE22
    CAN Communication Signal (Reference)
    ECM Terminal Name Between CANL 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.

  3. WAVEFORM 3

    A0049DAE06
    Engine Speed Signal
    ECM Terminal Name Between NEO and E1
    Tester Range 2 V/DIV., 2 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  4. WAVEFORM 4

    A004A4XE04
    Engine Speed Signal
    ECM Terminal Name Between TACH and E1
    Tester Range 5 V/DIV., 10 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  5. WAVEFORM 5

    A004ASGE10
    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.

  6. WAVEFORM 6

    A00481YE30
    Air Fuel Ratio Sensor Heater Operation Signal
    ECM Terminal Name Between HA1A and E04
    Tester Range 5 V/DIV., 10 ms./DIV.
    Condition Idling with cold engine

  7. WAVEFORM 7

    A004A0LE67
    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.

  8. WAVEFORM 8

    A004ANIE34
    Purge VSV Operation 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.

  9. WAVEFORM 9

    A0048TME04
    Cam Timing Control Motor EDT Signal
    ECM Terminal Name Between EDT1 and E1
    Tester Range 1 V/DIV., 5 ms./DIV.
    Condition Idling with warm engine

  10. WAVEFORM 10

    A004ARUE08
    Camshaft Timing Oil Control Valve Assembly Operation Signal
    ECM Terminal Name Between OE1+ and OE1-
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling

  11. WAVEFORM 11

    A0047I8E73
    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.

  12. WAVEFORM 12

    A0046WZE04
    Cam Timing Control Motor EMR Signal
    ECM Terminal Name Between EMR1 and E1
    Tester Range 2 V/DIV., 5 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  13. WAVEFORM 13

    A0047PVE02
    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 with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  14. WAVEFORM 14

    A004B73E45
    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.

  15. WAVEFORM 15

    A0049J8E03
    Cam Timing Control Motor EMD Signal
    ECM Terminal Name Between EMD1 and E1
    Tester Range 2 V/DIV., 100 ms./DIV.
    Condition Idling with warm engine

  16. WAVEFORM 16

    A0047WFE04
    No. 1 (to No. 4) Fuel Injector Assembly Signal
    ECM Terminal Name Between #10 (to #40) and E01
    Tester Range 20 V/DIV., 20 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  17. WAVEFORM 17

    A004ASEE05
    Heated Oxygen Sensor 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 B1S2 shows the values input to the ECM from the heated oxygen sensor.

  18. WAVEFORM 18

    A0049EEE07
    EGR Valve Assembly Operation Signal
    ECM Terminal Name

    CH1: Between EGR2 and E1

    CH2: Between EGR4 and E1
    Tester Range 10 V/DIV., 20 ms./DIV.
    Condition Engine racing with warm engine

  19. WAVEFORM 19

    A0047PUE07
    EGR Valve Assembly Operation Signal
    ECM Terminal Name

    CH1: Between EGR1 and E1

    CH2: Between EGR3 and E1
    Tester Range 10 V/DIV., 20 ms./DIV.
    Condition Engine racing with warm engine

  20. WAVEFORM 20

    A004968E28
    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.

  21. WAVEFORM 21

    A0049Y4E26
    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 condition.