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Terminals Of ECM

WARNING: This page is about a different variant/trim than selected.
Fig 1: ECU Connector Terminal Identification - ECM
GTY181399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
D61-17 (BATT) - B49-6 (E1) R - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
D61-22 (+BM) - B49-6 (E1) L - W-B Power source of throttle actuator Always 11 to 14 V
D60-21 (IGSW) - B49-6 (E1) W - W-B Ignition switch Ignition switch ON 11 to 14 V
D61-23 (+B) - B49-6 (E1) SB - W-B Power source of ECM Ignition switch ON 11 to 14 V
D61-24 (+B2) - B49-6 (E1) GR - W-B Power source of ECM Ignition switch ON 11 to 14 V
B49-28 (OC1+) - B49-22 (OC1-) V - L Camshaft timing oil control valve for intake side Idling Pulse generation (see waveform 1)
D60-36 (MREL) - B49-6 (E1) L - W-B EFI relay Ignition switch ON 11 to 14 V
B50-11 (VG) - B50-5 (E2G) R - Y Mass air flow meter Idling, shift lever in P or N, A/C switch off 0.5 to 3.0 V
B50-6 (THA) - B50-12 (ETHA) P - BR Intake air temperature sensor (built into mass air flow meter) Idling, intake air temperature 20°C (68°F) 0.5 to 3.4 V
B51-18 (THW) - B51-17 (ETHW) W - BR Engine coolant temperature sensor Idling, engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
B51-11 (VCTA) - B51-5 (ETA) R - BR Power source of throttle position sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
B51-9 (VTA1) - B51-5 (ETA) V - BR Throttle position sensor (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
B51-10 (VTA2) - B51-5 (ETA) LG - BR Throttle position sensor (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
D60-6 (VPA) - D60-2 (EPA) R - SB Accelerator pedal position sensor (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
D60-5 (VPA2) - D60-1 (EPA2) GR - V Accelerator pedal position sensor (for sensor malfunction detection) 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
D60-4 (VCPA) - D60-2 (EPA) SB - SB Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
D60-3 (VCP2) - D60-1 (EPA2) LG - V Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
B49-29 (HA1A) - B48-11 (E04) L - W-B Air fuel ratio sensor heater Idling Pulse generation (see waveform 2)
Ignition switch ON 11 to 14 V
B49-7 (A1A+) - B49-6 (E1) G - W-B Air fuel ratio sensor Ignition switch ON 3.3 V*1
B49-1 (A1A-) - B49-6 (E1) R - W-B Air fuel ratio sensor Ignition switch ON 3.0 V*1
B49-23 (HT1B) - B48-6 (E03) B - W-B Heated oxygen sensor heater Ignition switch ON 11 to 14 V
B49-2 (OX1B) - B49-8 (O1B-) BR - Y Heated oxygen sensor Engine speed maintained at 2500 rpm for 2 minutes after warming up engine Pulse generation (see waveform 3)
B48-7 (#10) - B48-1 (E01)
B48-8 (#20) - B48-1 (E01)
B48-9 (#30) - B48-1 (E01)
B48-10 (#40) - B48-1 (E01)		 L - W-B
Y - W-B
R-L - W-B
W - W-B		 Fuel injector Ignition switch ON 11 to 14 V
Idling Pulse generation (see waveform 4)
B51-12 (KNK1) - B51-6 (EKNK) B - W Knock sensor Engine speed maintained at 4000 rpm after warming up engine Pulse generation (see waveform 5)
B49-17 (G2+) - B49-5 (G2-) Y - P Camshaft position sensor for intake side Idling Pulse generation (see waveform 7)
B50-14 (NE+) - B50-2 (NE-) W - B Crankshaft position sensor Idling Pulse generation (see waveform 6)
B48-2 (IGT1) - B49-6 (E1)
B48-3 (IGT2) - B49-6 (E1)
B48-4 (IGT3) - B49-6 (E1)
B48-5 (IGT4) - B49-6 (E1)		 Y - W-B
P - W-B
G - W-B
L - W-B		 Ignition coil (ignition signal) Idling Pulse generation (see waveform 8)
B48-16 (IGF1) - B49-6 (E1) W - W-B Ignition coil (ignition confirmation signal) Ignition switch ON 4.5 to 5.5 V
Idling Pulse generation (see waveform 8)
B51-26 (PRG) - B49-6 (E1) G - W-B Purge VSV Ignition switch ON 11 to 14 V
Idling Pulse generation (see waveform 9)
D60-29 (SPD) - B49-6 (E1) LG - W-B Speed signal from combination meter Vehicle driven at 12 mph (20 km/h) Pulse generation (see waveform 10)
D60-8 (STA) - B49-6 (E1) B - W-B Starter signal Cranking 5.5 V or higher
B51-24 (NSW) - B49-6 (E1) GR - W-B Park/neutral position switch signal Ignition switch ON, shift lever in P or N Below 1.5 V
Ignition switch ON, shift lever not in P or N 6.0 V or higher
D60-20 (STP) - B49-6 (E1) R - W-B Stop light switch assembly Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
D60-15 (ST1-) - B49-6 (E1) LG - W-B Stop light switch assembly
(opposite to 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
B48-18 (M+) - B48-20 (ME01) R - W-B Throttle actuator Idling with warm engine Pulse generation (see waveform 11)
B48-19 (M-) - B48-20 (ME01) L - W-B Throttle actuator Idling with warm engine Pulse generation (see waveform 12)
D60-34 (FC) - B49-6 (E1) P- W-B Fuel pump control Ignition switch ON 11 to 14 V
Idling Below 1.5 V
D60-18 (W) - B49-6 (E1) Y - W-B MIL Ignition switch ON (MIL turns on) Below 1.5 V
Idling 11 to 14 V
D60-35 (TC) - B49-6 (E1) L - W-B Terminal TC of DLC3 Ignition switch ON 11 to 14 V
D60-23 (TACH) - B49-6 (E1) B - W-B Engine speed Idling Pulse generation (see waveform 13)
D61-7 (VPMP) - B49-6 (E1) P - W-B Vent valve (built into canister pump module) Ignition switch ON 11 to 14 V
D61-9 (MPMP) - B49-6 (E1) G - W-B Leak detection pump (built into canister pump module) Leak detection pump OFF Below 3 V
Leak detection pump ON 9 to 14 V
B51-3 (VCPP) - B51-4 (EPPM) Y - BR Power source for canister pressure sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
B51-2 (PPMP) - B51-4 (EPPM) W - BR Canister pressure sensor (built into canister pump module) Ignition switch ON 3.0 to 3.6 V
B49-25 (ALT) - B49-6 (E1) R - W-B Generator Ignition switch ON 11 to 14 V
D61-18 (CANH) - B49-6 (E1) R - W-B CAN communication line Ignition switch ON Pulse generation (see waveform 14)
D61-20 (CANL) - B49-6 (E1) W - W-B CAN communication line Ignition switch ON Pulse generation (see waveform 15)
B51-27 (ACIS) - B49-6 (E1) L - W-B VSV for Acoustic Control Induction System (ACIS) operation signal Ignition switch ON 11 to 14 V
B50-25 (OE1+) - B50-19 (OE1-) G - R Camshaft timing oil control valve for exhaust side Idling Pulse generation (see waveform 1)
B49-11 (VCV1) - B49-6 (E1) L - W-B Power source of camshaft position sensor for intake side (specific voltage) Ignition switch ON 4.5 to 5.5 V
B50-7 (VCE1) - B49-6 (E1) B - W-B Power source of camshaft position sensor for exhaust side (specific voltage) Ignition switch ON 4.5 to 5.5 V
B50-13 (EV1+) - B50-1 (EV1-) G - W Camshaft position sensor for exhaust side Idling Pulse generation (see waveform 7)
B51-33 (IA1+) - B48-1 (E01) W - W-B DC motor for tumble control valve Idling with cold engine Pulse generation (see waveform 16)
B51-34 (IA1-) - B48-1 (E01) B - W-B DC motor for tumble control valve Idling with cold engine Pulse generation (see waveform 17)
B50-18 (IAC1) - B50-17 (EIA1) GR - BR Tumble control valve position sensor Ignition switch ON 3.0 to 4.0 V
B50-16 (VCIA) - B49-6 (E1) V - W-B Power source of tumble control valve position sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
B51-35 (AICV) - B49-6 (E1) P - W-B VSV for air intake control system operation signal Ignition switch ON 11 to 14 V
B51-30 (CAN+) - B49-6 (E1) B - W-B CAN communication line Ignition switch ON Pulse generation (see waveform 18)
B51-36 (CAN-) - B49-6 (E1) W - W-B CAN communication line Ignition switch ON Pulse generation (see waveform 19)
D60-28 (SFTU) - B49-6 (E1) V - W-B Up shift switch signal Ignition switch ON and shift lever in S 11 to 14 V
Ignition switch ON and shift lever in S, the "+" range (up shift) selected 0 to 1.5 V
D61-4 (SFTD) - B49-6 (E1) LG - W-B Down shift switch signal Ignition switch ON and shift lever in S 11 to 14 V
Ignition switch ON and shift lever in S, the "-" range (down shift) selected 0 to 1.5 V
D61-10 (RFC) - B49-6 (E1) V - W-B Cooling fan control Ignition switch ON, air conditioner on (max cool) Pulse generation (see waveform 20)
B50-28 (P) - B49-6 (E1) L - W-B P shift position switch signal Ignition switch ON and shift lever in P 11 to 14 V
Ignition switch ON and shift lever in any position other than P 0 to 1.5 V
B50-27 (R) - B49-6 (E1) B - W-B R shift position switch signal Ignition switch ON and shift lever in R 11 to 14 V
Ignition switch ON and shift lever in any position other than R 0 to 1.5 V
B50-26 (N) - B49-6 (E1) LG - W-B N shift position switch signal Ignition switch ON and shift lever in N 11 to 14 V
Ignition switch ON and shift lever in any position other than N 0 to 1.5 V
B50-30 (D) - B49-6 (E1) G - W-B 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 in any position other than D or S 0 to 1.5 V
D60-30 (S) - B49-6 (E1) SB - W-B S shift position switch signal Ignition switch ON and shift lever in S 11 to 14 V
Ignition switch ON and shift lever in any position other than S 0 to 1.5 V
D61-13 (SNW1) - B49-6 (E1) V - W-B ECT SNOW switch signal Ignition switch ON 11 to 14 V
Ignition switch ON and press continuously pattern select switch (ECT SNOW switch) Below 1 V
B51-29 (PBV) - B49-6 (E1) Y - W-B Brake ejector VSV Ignition switch ON 11 to 14 V

HINT: 

*1: The ECM terminal voltage is constant regardless of the output voltage shown on the Techstream.

  1. WAVEFORM 1 
    Fig 2: Identifying Waveform 1
    GTY179213Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAMSHAFT TIMING OIL CONTROL VALVE SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B49-28 (OC1+) - B49-22 (OC1-) 5 V/DIV, 1 ms/DIV Idling
    B50-25 (OE1+) - B50-19 (OE1-) 5 V/DIV, 1 ms/DIV Idling
  2. WAVEFORM 2 
    Fig 3: Identifying Waveform 2
    GTY193406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    AIR FUEL RATIO SENSOR (BANK 1 SENSOR 1) HEATER SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B49-29 (HA1A) - B48-11 (E04) 5 V/DIV, 10 ms/DIV Idling

    HINT: 

    The wavelength varies in accordance with the engine operating condition.

  3. WAVEFORM 3 
    Fig 4: Identifying Waveform 3
    GTY191629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    HEATED OXYGEN SENSOR (BANK 1 SENSOR 2) SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B49-2 (OX1B) - B49-8 (O1B-) 0.2 V/DIV, 200 ms/DIV Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

    HINT: 

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

  4. WAVEFORM 4 
    Fig 5: Identifying Waveform 4
    GTY178148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    INJECTOR NO. 1 (TO NO. 4) INJECTION SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B48-7 (#10) - B48-1 (E01) 20 V/DIV, 20 ms/DIV Idling
    B48-8 (#20) - B48-1 (E01) 20 V/DIV, 20 ms/DIV Idling
    B48-9 (#30) - B48-1 (E01) 20 V/DIV, 20 ms/DIV Idling
    B48-10 (#40) - B48-1 (E01) 20 V/DIV, 20 ms/DIV Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  5. WAVEFORM 5 
    Fig 6: Identifying Waveform 5
    GTY191588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    KNOCK SENSOR SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B51-12 (KNK1) - B51-6 (EKNK) 1 V/DIV, 1 ms/DIV 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.
  6. WAVEFORM 6 
    Fig 7: Identifying Waveform 6
    GTY296838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CRANKSHAFT POSITION SENSOR SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B50-14 (NE+) - B50-2 (NE-) 5 V/DIV, 20 ms/DIV Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  7. WAVEFORM 7 
    Fig 8: Identifying Waveform 7
    GTY295355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAMSHAFT POSITION SENSOR SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B49-17 (G2+) - B49-5 (G2-) 5 V/DIV, 20 ms/DIV Idling
    B50-13 (EV1+) - B50-1 (EV1-) 5 V/DIV, 20 ms/DIV Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  8. WAVEFORM 8 
    Fig 9: Identifying Waveform 8
    GTY381917Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    IGNITION COIL IGT SIGNAL (FROM ECM TO IGNITION COIL) AND IGNITION COIL IGF SIGNAL (FROM IGNITION COIL TO ECM)

    Terminal No. (Symbol) Tool Setting Condition
    B48-2 (IGT1) - B49-6 (E1) 2 V/DIV, 20 ms/DIV Idling
    B48-3 (IGT2) - B49-6 (E1) 2 V/DIV, 20 ms/DIV Idling
    B48-4 (IGT3) - B49-6 (E1) 2 V/DIV, 20 ms/DIV Idling
    B48-5 (IGT4) - B49-6 (E1) 2 V/DIV, 20 ms/DIV Idling
    B48-16 (IGF1) - B49-6 (E1) 2 V/DIV, 20 ms/DIV Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  9. WAVEFORM 9 
    Fig 10: Identifying Waveform 9
    GTY181869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    PURGE VSV SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B51-26 (PRG) - B49-6 (E1) 10 V/DIV, 20 ms/DIV Idling

    HINT: 

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

  10. WAVEFORM 10 
    Fig 11: Identifying Waveform 10
    GTY191645Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VEHICLE SPEED SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    D60-29 (SPD) - B49-6 (E1) 2 V/DIV, 20 ms/DIV Vehicle driven at 12 mph (20 km/h)

    HINT: 

    The wavelength becomes shorter as the vehicle speed increases.

  11. WAVEFORM 11 
    Fig 12: Identifying Waveform 11
    GTY316529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    THROTTLE ACTUATOR POSITIVE TERMINAL SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B48-18 (M+) - B48-20 (ME01) 5 V/DIV, 1 ms/DIV Idling with warm engine

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

  12. WAVEFORM 12 
    Fig 13: Identifying Waveform 12
    GTY321879Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    THROTTLE ACTUATOR NEGATIVE TERMINAL SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B48-19 (M-) - B48-20 (ME01) 5 V/DIV, 1 ms/DIV Idling with warm engine

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

  13. WAVEFORM 13 
    Fig 14: Identifying Waveform 13
    GTY184277Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ENGINE SPEED SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    D60-23 (TACH) - B49-6 (E1) 5 V/DIV, 10 ms/DIV Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

  14. WAVEFORM 14 
    Fig 15: Identifying Waveform 14
    GTY170910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAN COMMUNICATION SIGNAL (REFERENCE)

    Terminal No. (Symbol) Tool Setting Condition
    D61-18 (CANH) - B49-6 (E1) 1 V/DIV, 10 μs/DIV Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

  15. WAVEFORM 15 
    Fig 16: Identifying Waveform 15
    GTY191602Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAN COMMUNICATION SIGNAL (REFERENCE)

    Terminal No. (Symbol) Tool Setting Condition
    D61-20 (CANL) - B49-6 (E1) 1 V/DIV, 10 μs/DIV Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

  16. WAVEFORM 16 
    Fig 17: Identifying Waveform 16
    GTY186267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DC MOTOR FOR TUMBLE CONTROL VALVE POSITIVE TERMINAL SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B51-33 (IA1+) - B48-1 (E01) 5 V/DIV, 1 ms/DIV Idling with cold engine
  17. WAVEFORM 17 
    Fig 18: Identifying Waveform 17
    GTY191651Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DC MOTOR FOR TUMBLE CONTROL VALVE NEGATIVE TERMINAL SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B51-34 (IA1-) - B48-1 (E01) 5 V/DIV, 1 ms/DIV Idling with cold engine
  18. WAVEFORM 18 
    Fig 19: Identifying Waveform 18
    GTY191599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAN COMMUNICATION SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B51-30 (CAN+) - B49-6 (E1) 1 V/DIV, 10 μsec/DIV Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

  19. WAVEFORM 19 
    Fig 20: Identifying Waveform 19
    GTY191601Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAN COMMUNICATION SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    B51-36 (CAN-) - B49-6 (E1) 1 V/DIV, 10 μsec/DIV Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

  20. WAVEFORM 20 
    Fig 21: Identifying Waveform 20
    GTY318366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COOLING FAN CONTROL SIGNAL

    Terminal No. (Symbol) Tool Setting Condition
    D61-10 (RFC) - B49-6 (E1) 1 V/DIV, 20 ms/DIV Ignition switch ON, air conditioner on (max cool)

    HINT: 

    The duty ratio varies depending on the engine coolant temperature.

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