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Terminals Of ECM [12/2013 - 11/2016]

WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: SFI System Terminal Connector Identification
GTY437920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: 

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.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
A43-1 (BATT) - C1-49 (E1) GR - BR Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
A43-2 (+B) - C1-49 (E1) G - BR Power source of ECM Ignition switch ON 11 to 14 V
A43-3 (+B2) - C1-49 (E1) R - BR Power source of ECM Ignition switch ON 11 to 14 V
C1-60 (+BM) - C1-49 (E1) R - BR Power source of throttle actuator Always 11 to 14 V
A43-46 (MREL) - C1-49 (E1) B - BR EFI MAIN relay operation signal Ignition switch ON 11 to 14 V
C1-111 (VCV1) - C1-49 (E1) G - BR Power source for sensors (specific voltage) Ignition switch ON 4.5 to 5.5 V
A43-32 (IGSW) - C1-49 (E1) W - BR Ignition (engine) switch signal Ignition switch ON 11 to 14 V
A43-51 (STP) - C1-49 (E1) G - BR Stop light switch assembly signal Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
A43-36 (ST1-) - C1-49 (E1) L - BR Stop light switch assembly signal (opposite of STP voltage at terminal) Ignition switch ON, brake pedal depressed Below 1.5 V
Ignition switch ON, brake pedal released 7.5 to 14 V
A43-56 (VCPA) - A43-55 (EPA) B - Y Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
A43-59 (VCP2) - A43-58 (EPA2) W - BE Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
A43-54 (VPA) - A43-55 (EPA) G - Y 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
A43-57 (VPA2) - A43-58 (EPA2) R - BE 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
C1-126 (VCTA) - C1-125 (ETA) B - R Power source for throttle position sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
C1-128 (VTA1) - C1-125 (ETA) Y - R 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
C1-127 (VTA2) - C1-125 (ETA) BR - R 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
A43-7 (VPMP) - C1-49 (E1) V - BR Vent valve
(built into canister pump module)		 Ignition switch ON 11 to 14 V
A43-6 (MPMP) - C1-49 (E1) B - BR Leak detection pump
(built into canister pump module)		 Leak detection pump off Below 3.0 V
Leak detection pump on 9 to 14 V
A43-42 (PPMP) - C1-49 (E1) BR - BR Canister pressure sensor
(built into canister pump module)		 Ignition switch ON 3.0 to 3.6 V
A43-45 (TC) - C1-49 (E1) G - BR Terminal TC of DLC3 Ignition switch ON 11 to 14 V
A43-23 (TACH) - C1-49 (E1) L - BR Engine speed signal (for combination meter assembly) Idling Pulse generation
(see waveform 1)
A43-10 (SPD) - C1-49 (E1) BE - BR Vehicle speed signal from combination meter assembly Driving at 20 km/h (12 mph) Pulse generation
(see waveform 2)
C1-58 (#10) - C1-25 (E01) B - W-B No. 1 fuel injector assembly signal Ignition switch ON 11 to 14 V
Idling Pulse generation
(see waveform 3)
C1-54 (#20) - C1-25 (E01) R - W-B No. 2 fuel injector assembly signal Ignition switch ON 11 to 14 V
Idling Pulse generation
(see waveform 3)
C1-57 (#30) - C1-25 (E01) Y - W-B No. 3 fuel injector assembly signal Ignition switch ON 11 to 14 V
Idling Pulse generation
(see waveform 3)
C1-53 (#40) - C1-25 (E01) L - W-B No. 4 fuel injector assembly signal Ignition switch ON 11 to 14 V
Idling Pulse generation
(see waveform 3)
C1-56 (#50) - C1-25 (E01) P - W-B No. 5 fuel injector assembly signal Ignition switch ON 11 to 14 V
Idling Pulse generation
(see waveform 3)
C1-55 (#60) - C1-25 (E01) G - W-B No. 6 fuel injector assembly signal Ignition switch ON 11 to 14 V
Idling Pulse generation
(see waveform 3)
A43-9 (STA) - C1-49 (E1) LG - BR ST relay operation signal Cranking 11 to 14 V
C1-35 (OC1+) - C1-5 (OC1-) W - B Camshaft timing oil control valve assembly (for intake camshaft of bank 1) operation signal Idling Pulse generation
(see waveform 4)
C1-34 (OC2+) - C1-4 (OC2-) GR - R Camshaft timing oil control valve assembly (for intake camshaft of bank 2) operation signal Idling Pulse generation
(see waveform 4)
C1-33 (OE1+) - C1-3 (OE1-) L - LG Camshaft timing oil control valve assembly (for exhaust camshaft of bank 1) operation signal Idling Pulse generation
(see waveform 5)
C1-32 (OE2+) - C1-2 (OE2-) W - Y Camshaft timing oil control valve assembly (for exhaust camshaft of bank 2) operation signal Idling Pulse generation
(see waveform 5)
C1-81 (VV1+) - C1-110 (VV1-) L - P VVT sensor (for intake camshaft of bank 1) signal Idling Pulse generation
(see waveform 6)
C1-78 (VV2+) - C1-110 (VV1-) W - P VVT sensor (for intake camshaft of bank 2) signal Idling Pulse generation
(see waveform 6)
C1-79 (EV1+) - C1-110 (VV1-) V - P VVT sensor (for exhaust camshaft of bank 1) signal Idling Pulse generation
(see waveform 7)
C1-80 (EV2+) - C1-110 (VV1-) G - P VVT sensor (for exhaust camshaft of bank 2) signal Idling Pulse generation
(see waveform 7)
C1-76 (NE+) - C1-109 (NE-) B - W Crankshaft position sensor signal Idling Pulse generation
(see waveform 6, 7)
A43-22 (NEO)*2 - C1-49 (E1) GR - BR Engine speed signal sent to certification ECU (smart key ECU assembly) Idling with warm engine Pulse generation (see waveform 8)
C1-30 (M+) - C1-59 (ME01) W - BR Throttle actuator operation signal (positive terminal) Idling with warm engine Pulse generation
(see waveform 9)
C1-29 (M-) - C1-59 (ME01) B - BR Throttle actuator operation signal (negative terminal) Idling with warm engine Pulse generation
(see waveform 10)
C1-107 (IGT1) - C1-49 (E1) Y - BR No. 1 ignition coil assembly (ignition signal) Idling Pulse generation
(see waveform 11)
C1-140 (IGT2) - C1-49 (E1) R - BR No. 2 ignition coil assembly (ignition signal) Idling Pulse generation
(see waveform 11)
C1-106 (IGT3) - C1-49 (E1) G - BR No. 3 ignition coil assembly (ignition signal) Idling Pulse generation
(see waveform 11)
C1-139 (IGT4) - C1-49 (E1) L - BR No. 4 ignition coil assembly (ignition signal) Idling Pulse generation
(see waveform 11)
C1-105 (IGT5) - C1-49 (E1) P - BR No. 5 ignition coil assembly (ignition signal) Idling Pulse generation
(see waveform 11)
C1-138 (IGT6) - C1-49 (E1) BR - BR No. 6 ignition coil assembly (ignition signal) Idling Pulse generation
(see waveform 11)
C1-103 (IGF1) - C1-49 (E1) W - BR Ignition coil assembly (ignition confirmation signal) Ignition switch ON 4.5 to 5.0 V
Idling Pulse generation
(see waveform 11)
C1-114 (THW) - C1-117 (ETHW) B - P Engine coolant temperature sensor signal Idling, engine coolant temperature 60 to 120°C (140 to 248°F) 0.2 to 1.0 V
C1-96 (THA) - C1-118 (ETHA) P - Y Intake air temperature sensor signal Idling, intake air temperature 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
C1-98 (VG) - C1-130 (E2G) L - R Mass air flow meter sub-assembly signal Idling, shift lever in P or N, A/C switch off 0.5 to 3.0 V
C1-47 (ACIS) - C1-49 (E1) L - BR Intake air control valve assembly (for acoustic control induction system) operation signal Ignition switch ON 11 to 14 V
C1-48 (PRG) - C1-49 (E1) R - BR Purge VSV for EVAP system operation signal Ignition switch ON 11 to 14 V
Idling with warm engine, under purge control Pulse generation
(see waveform 12)
C1-100 (A1A+) - C1-49 (E1) L - BR Air fuel ratio sensor (bank 1 sensor 1) signal Ignition switch ON 3.3 V*1
C1-132 (A1A-) - C1-49 (E1) P - BR Air fuel ratio sensor (bank 1 sensor 1) signal Ignition switch ON 2.9 V*1
C1-99 (A2A+) - C1-49 (E1) R - BR Air fuel ratio sensor (bank 2 sensor 1) signal Ignition switch ON 3.3 V*1
C1-131 (A2A-) - C1-49 (E1) G - BR Air fuel ratio sensor (bank 2 sensor 1) signal Ignition switch ON 2.9 V*1
C1-26 (HA1A) - C1-21 (E05) R - W-B Air fuel ratio sensor (bank 1 sensor 1) heater operation signal Idling Pulse generation (see waveform 13)
Ignition switch ON 11 to 14 V
C1-20 (HA2A) - C1-21 (E05) W - W-B Air fuel ratio sensor (bank 2 sensor 1) heater operation signal Idling Pulse generation (see waveform 13)
Ignition switch ON 11 to 14 V
C1-101 (OX1B) - C1-102 (EX1B) W - GR Heated oxygen sensor (bank 1 sensor 2) signal Engine speed maintained at 2500 rpm for 2 minutes after warming up engine Pulse generation
(see waveform 14)
C1-133 (OX2B) - C1-134 (EX2B) B - R Heated oxygen sensor (bank 2 sensor 2) signal Engine speed maintained at 2500 rpm for 2 minutes after warming up engine Pulse generation
(see waveform 14)
C1-28 (HT1B) - C1-27 (E04) G - W-B Heated oxygen sensor (bank 1 sensor 2) heater operation signal Idling Below 3.0 V
Ignition switch ON 11 to 14 V
C1-22 (HT2B) - C1-27 (E04) Y - W-B Heated oxygen sensor (bank 2 sensor 2) heater operation signal Idling Below 3.0 V
Ignition switch ON 11 to 14 V
C1-65 (NSW) - C1-49 (E1) LG - BR Park/Neutral position switch assembly signal Ignition switch ON and shift lever in P or N Below 3.0 V
Ignition switch ON and shift lever not in P or N 11 to 14 V
C1-83 (KNK1) - C1-115 (EKNK) R - G Knock control sensor (bank 1) signal Engine speed maintained at 4000 rpm after warming up engine Pulse generation
(see waveform 15)
C1-84 (KNK2) - C1-116 (EKN2) B - W Knock control sensor (bank 2) signal Engine speed maintained at 4000 rpm after warming up engine Pulse generation
(see waveform 15)
C1-70 (P) - C1-49 (E1) B - BR P shift position switch signal Ignition switch ON and shift lever in P 11 to 14 V
Ignition switch ON and shift lever not in P Below 1 V
C1-68 (R) - C1-49 (E1) GR - BR R shift position switch signal Ignition switch ON and shift lever in R 11 to 14 V
Ignition switch ON and shift lever not in R Below 1 V
C1-71 (N) - C1-49 (E1) L - BR N shift position switch signal Ignition switch ON and shift lever in N 11 to 14 V
Ignition switch ON and shift lever not in N Below 1 V
C1-69 (D) - C1-49 (E1) G - BR D shift position switch signal Ignition switch ON and shift lever in D or S 11 to 14 V
Ignition switch ON and shift lever not in D or S Below 1 V
A43-37 (S) - C1-49 (E1) LG - BR S shift position switch signal Ignition switch ON and shift lever in S 11 to 14 V
Ignition switch ON and shift lever not in S Below 1 V
A43-50 (SFTD) - C1-49 (E1) SB - BR Down shift switch signal Ignition switch ON and shift lever in S 11 to 14 V
Ignition switch ON and shift lever in "-" (down shift) select and held Below 1 V
A43-34 (SFTU) - C1-49 (E1) V - BR Up shift switch signal Ignition switch ON and shift lever in S 11 to 14 V
Ignition switch ON and shift lever in "+" (up shift) select and held Below 1 V
A43-18 (FPC) - C1-49 (E1) P - BR Fuel pump control Engine stopped, ignition switch ON Below 1.5 V
A43-13 (CANH) - C1-49 (E1) B - BR CAN communication line Ignition switch ON Pulse generation
(see waveform 16)
A43-26 (CANL) - C1-49 (E1) W - BR CAN communication line Ignition switch ON Pulse generation
(see waveform 17)
C1-31 (CAN+) - C1-49 (E1) B - BR CAN communication line Ignition switch ON Pulse generation
(see waveform 16)
C1-1 (CAN-) - C1-49 (E1) W - BR CAN communication line Ignition switch ON Pulse generation
(see waveform 17)
C1-112 (ALT) - C1-49 (E1) L - BR Generator assembly Ignition switch ON 11 to 14 V
A43-5 (RFC) - C1-49 (E1) W - BR Cooling fan control signal Ignition switch ON, A/C switch on (max cool) Pulse generation
(see waveform 18)
A43-11 (SNWI) - C1-49 (E1) GR - BR SNOW mode switch signal Ignition switch ON 11 to 14 V
Ignition switch ON, SNOW mode switch being pushed and held Below 1.5 V
C1-108 (GE01) - C1-49 (E1) BR - BR Shielded earth (ground) circuit of throttle actuator Always Below 1 Ω
A43-14 (EC) - Body ground W-B - - Ground Always Below 1 Ω
C1-49 (E1) - Body ground BR - - Ground Always Below 1 Ω
C1-25 (E01) - Body ground W-B - - Ground Always Below 1 Ω
C1-24 (E02) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 Ω
C1-27 (E04) - Body ground W-B - - Ground Always Below 1 Ω
C1-21 (E05) - Body ground W-B - - Ground Always Below 1 Ω

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

*2: w/ Smart Key System

  1. WAVEFORM 1 
    Fig 2: Waveform 1
    GTY379202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ENGINE SPEED SIGNAL

    ECM Terminal Name Between TACH and E1
    Tester Range 5 V/DIV., 10 ms./DIV.
    Condition Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  2. WAVEFORM 2 
    Fig 3: Waveform 2
    GTY370486Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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)

    HINT: 

    The wavelength becomes shorter as the vehicle speed increases.

  3. WAVEFORM 3 
    Fig 4: Waveform 3
    GTY378937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NO. 1 (TO NO. 6) FUEL INJECTOR ASSEMBLY SIGNAL

    ECM Terminal Name Between #10 (to #60) and E01
    Tester Range 20 V/DIV., 20 ms./DIV.
    Condition Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  4. WAVEFORM 4 
    Fig 5: Waveform 4
    GTY365221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) OPERATION SIGNAL

    ECM Terminal Name Between OC1+ and OC1-, or OC2+ and OC2-
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling
  5. WAVEFORM 5 
    Fig 6: Waveform 5
    GTY365221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) OPERATION SIGNAL

    ECM Terminal Name Between OE1+ and OE1-, or OE2+ and OE2-
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling
  6. WAVEFORM 6 
    Fig 7: Waveform 6
    GTY184605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CRANKSHAFT POSITION SENSOR SIGNAL AND VVT SENSOR (FOR INTAKE CAMSHAFT) SIGNAL

    ECM Terminal Name Between NE+ and NE-
    Between VV1+ and VV1-
    Between VV2+ and VV1-
    Tester Range 5 V/DIV., 20 ms./DIV.
    Condition Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  7. WAVEFORM 7 
    Fig 8: Waveform 7
    GTY179531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CRANKSHAFT POSITION SENSOR SIGNAL AND VVT SENSOR (FOR EXHAUST CAMSHAFT) SIGNAL

    ECM Terminal Name Between NE+ and NE-
    Between EV1+ and VV1-
    Between EV2+ and VV1-
    Tester Range 5 V/DIV., 20 ms./DIV.
    Condition Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  8. WAVEFORM 8 
    Fig 9: Waveform 8
    GTY377052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ENGINE SPEED SIGNAL

    ECM Terminal Name Between NEO and E1
    Tester Range 5 V/DIV., 2 ms./DIV.
    Condition Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  9. WAVEFORM 9 
    Fig 10: Waveform 9
    GTY290954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

  10. WAVEFORM 10 
    Fig 11: Waveform 10
    GTY292199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

  11. WAVEFORM 11 
    Fig 12: Waveform 11
    GTY445226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    IGNITION COIL ASSEMBLY SIGNAL (IGT AND IGF1 SIGNAL)

    ECM Terminal Name Between IGT (1 to 6) and E1
    Between IGF1 and E1
    Tester Range 2 V/DIV., 20 ms./DIV.
    Condition Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  12. WAVEFORM 12 
    Fig 13: Waveform 12
    GTY317179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    PURGE VSV OPERATION SIGNAL

    ECM Terminal Name Between PRG and E1
    Tester Range 10 V/DIV., 20 ms./DIV.
    Condition Idling with warm engine, under purge control

    HINT: 

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

  13. WAVEFORM 13 
    Fig 14: Waveform 13
    GTY320357Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    AIR FUEL RATIO SENSOR (SENSOR 1) HEATER OPERATION SIGNAL

    ECM Terminal Name Between HA1A and E05, or HA2A and E05
    Tester Range 5 V/DIV., 10 ms./DIV.
    Condition Idling
  14. WAVEFORM 14 
    Fig 15: Waveform 14
    GTY373553Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    HEATED OXYGEN SENSOR (SENSOR 2) SIGNAL

    ECM Terminal Name Between OX1B and EX1B, or OX2B and EX2B
    Tester Range 0.2 V/DIV., 200 ms./DIV.
    Condition Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

    HINT: 

    In the Data List, item O2S B1S2 and O2S B2S2 shows the ECM values from the heated oxygen sensor.

  15. WAVEFORM 15 
    Fig 16: Waveform 15
    GTY383385Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    KNOCK CONTROL SENSOR SIGNAL

    ECM Terminal Name Between KNK1 and EKNK, or KNK2 and EKN2
    Tester Range 1 V/DIV., 1 ms./DIV.
    Condition Engine speed maintained at 4000 rpm after warming up engine

    HINT: 

    • The wavelength becomes shorter as the engine speed increases.
    • The waveforms and amplitudes displayed differ slightly depending on the vehicle condition.
  16. WAVEFORM 16 
    Fig 17: Waveform 16
    GTY368435Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAN COMMUNICATION SIGNAL (REFERENCE)

    ECM Terminal Name Between CANH and E1, or CAN+ and E1
    Tester Range 1 V/DIV., 10 μs./DIV.
    Condition Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

  17. WAVEFORM 17 
    Fig 18: Waveform 17
    GTY435653Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAN COMMUNICATION SIGNAL (REFERENCE)

    ECM Terminal Name Between CANL and E1, or CAN- and E1
    Tester Range 1 V/DIV., 10 μs./DIV.
    Condition Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

  18. WAVEFORM 18 
    Fig 19: Waveform 18
    GTY436065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COOLING FAN CONTROL SIGNAL

    ECM Terminal Name Between RFC and E1
    Tester Range 1 V/DIV., 20 ms./DIV.
    Condition Ignition switch ON, A/C switch on (max cool)

    HINT: 

    The duty ratio varies depending on the engine coolant temperature.

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