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Terminals Of ECM

Fig 1: Identifying Terminals Of ECM
G04026775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Each ECM terminal's standard voltage is shown in the table below. In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specified Condition". Use the illustration above as a reference for the ECM terminals.

TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
BATT (A6-4) - E1 (E7-7) L - BR Battery (for measuring battery voltage and for the ECM memory) Always 9 to 14 V
+BM (E8-5) - ME01 (E8-4) P - BR Power source of throttle motor Always 9 to 14 V
IGSW (A6-17) - E1 (E7-7) B-W - BR Engine switch Engine switch on (IG) 9 to 14 V
+B (A6-6) - E1 (E7-7) B-R - BR Power source of ECM Engine switch on (IG) 9 to 14 V
+B1 (A6-5) - E1 (E7-7) B-R - BR Power source of ECM Engine switch on (IG) 9 to 14 V
VC (E8-29) - E2 (E8-28) L-Y - BR Power source of sensor (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
VTA (E8-23) - E2 (E8-28) R-L - BR Throttle position sensor (for engine control) Engine switch on (IG), accelerator pedal fully released 0.5 to 1.2 V
VTA (E8-23) - E2 (E8-28) R-L - BR Throttle position sensor (for engine control) Engine switch on (IG), accelerator pedal fully depressed 3.2 to 4.8 V
VTA2 (E8-22) - E2 (E8-28) L-B - BR Throttle position sensor (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully released 2.1 to 3.1 V
VTA2 (E8-22) - E2 (E8-28) L-B - BR Throttle position sensor (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully depressed 4.5 to 5.5 V
VPA (A7-33) - EPA (A7-34) G-W - L-Y Accelerator pedal position sensor (for engine control) Engine switch on (IG), accelerator pedal fully released 0.5 to 1.1 V
VPA (A7-33) - EPA (A7-34) G-W - L-Y Accelerator pedal position sensor (for engine control) Engine switch on (IG), accelerator pedal fully depressed 2.6 to 4.5 V
VPA2 (A7-32) - EPA2 (A7-26) P-L - BR Accelerator pedal position sensor (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully released 1.2 to 2.0 V
VPA2 (A7-32) - EPA2 (A7-26) P-L - BR Accelerator pedal position sensor (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully depressed 3.4 to 5.3 V
VCPA (A7-35) - EPA (A7-34) P - L-Y Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4.5 to 5.5 V
VCP2 (A7-27) - EPA2 (A7-26) LG - BR Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.5 V
VG (E6-27) - E2G (E6-26) G-B - R-L MAF meter Idling, shift position P or N, A/C switch off 0.5 to 3.0 V
THA (E6-25) - E2 (E8-28) G - BR IAT sensor Idling, IAT: 0 to 80°C (32 to 176°F) after warm-up 0.5 to 3.4 V
THW (E6-20) - E2 (E8-28) R - BR ECT sensor Idling, ECT: 60 to 100°C (140 to 212°F) after warm-up 0.2 to 1.0 V
STA (A6-12) - E1 (E7-7) R - BR Starter signal Cranking (shift position P or N position and engine switch start) 6 V or more
#1 (E8-15) - E01 (E6-2) Y-B - W-B Injector Idling Pulse generation (see  1 )
#2 (E6-17) - E01 (E6-2) B-Y - W-B
#3 (E8-14) - E01 (E6-2) R-W - W-B
#4 (E6-16) - E01 (E6-2) LG - W-B
#5 (E8-13) - E01 (E6-2) L-W - W-B
#6 (E6-15) - E01 (E6-2) R - W-B
#7 (E8-12) - E01 (E6-2) B-L - W-B
#8 (E6-14) - E01 (E6-2) G-W - W-B
#1 (E8-15) - E01 (E6-2) Y-B - W-B Injector Engine switch on (IG) 9 to 14 V
#2 (E6-17) - E01 (E6-2) B-Y - W-B
#3 (E8-14) - E01 (E6-2) R-W - W-B
#4 (E6-16) - E01 (E6-2) LG - W-B
#5 (E8-13) - E01 (E6-2) L-W - W-B
#6 (E6-15) - E01 (E6-2) R - W-B
#7 (E8-12) - E01 (E6-2) G-W - W-B
#8 (E6-14) - E01 (E6-2) B-L - W-B
IGT1 (E8-17) - E1 (E7-7) L-R - BR Ignition coil and igniter (ignition signal) Idling Pulse generation (see  2 )
IGT2 (E6-13) - E1 (E7-7) L-B - BR
IGT3 (E8-16) - E1 (E7-7) V - BR
IGT4 (E6-12) - E1 (E7-7) P-L - BR
IGT5 (E8-27) - E1 (E7-7) W-L - BR
IGT6 (E6-11) - E1 (E7-7) W-L - BR
IGT7 (E8-26) - E1 (E7-7) LG-B - BR
IGT8 (E6-10) - E1 (E7-7) L-W - BR
IGF1 (E6-7) - E1 (E7-7) G-B - BR Ignition coil and igniter (ignition confirmation signal) Idling Pulse generation (see  2 )
IGF2 (E6-6) - E1 (E7-7) R - BR
IGF1 (E6-7) - E1 (E7-7) G-B - BR Ignition coil and igniter (ignition confirmation signal) Engine switch on (IG) 4.5 to 5.5 V
IGF2 (E6-6) - E1 (E7-7) R - BR
G2 (E8-21) - G2- (E8-20) Y - L Camshaft position sensor Idling Pulse generation (see  3 )
NE+ (E8-32) - NE- (E8-31) R - G Crankshaft position sensor Idling Pulse generation (see  3 and  8 )
MREL (A6-13) - E1 (E7-7) Y - BR EFI MAIN relay Engine switch on (IG) 9 to 14 V
MREL (A6-13) - E1 (E7-7) Y - BR EFI MAIN relay Engine switch off (for 3 seconds or more) Below 1.5 V
FPR (A6-15) - E01 (E6-2) R-W - W-B F/PMP relay Engine switch on (IG) Below 3 V
FPR (A6-15) - E01 (E6-2) R-W - W-B F/PMP relay Cranking 6 to 14 V
FC (A6-14) - E01 (E6-2) R-G - W-B Fuel pump control Engine switch on (IG) 9 to 14 V
FC (A6-14) - E01 (E6-2) R-G - W-B Fuel pump control Idling after engine warm-up Below 3 V
STP (A7-4) - E1 (E7-7) R-B - BR Stop light switch Brake pedal is depressed 7.5 to 14 V
STP (A7-4) - E1 (E7-7) R-B - BR Stop light switch Brake pedal is released Below 1.5 V
ST1- (A6-8) - E1 (E7-7) G-W - BR Stop light switch (opposite to STP terminal) Engine switch on (IG)
Brake pedal is depressed		 Below 1.5 V
ST1- (A6-8) - E1 (E7-7) G-W - BR Stop light switch (opposite to STP terminal) Engine switch on (IG)
Brake pedal is released		 7.5 to 14 V
PRG (E8-11) - E01 (E6-2) W - W-B VSV (for EVAP) Engine switch on (IG) and engine stopped 9 to 14 V
PRG (E8-11) - E01 (E6-2) W - W-B VSV (for EVAP) Idling after engine warm-up Pulse generation (see  4 )
OX1A (E8-30) - O1A- (E8-25) B - BR Heated oxygen sensor (bank 1, 2 sensor 1) Idling 0.1 to 0.9 V Pulse generation (see  5 )
OX2A (E6-28) - O2A- (E6-21) W - BR
OX1B (A7-28) - O1B- (A7-29) W - LG-R Heated oxygen sensor (bank 1, 2 sensor 2) Idling 0.1 to 0.9 V Pulse generation (see  6 )
OX2B (A7-17) - O2B- (A7-18) B - G
HT1A (E8-24) - E03 (E8-6) B-W - W-B Heated oxygen sensor heater Idling Below 3.0 V
HT1B (A7-2) - E03 (E8-6) Y-B - W-B
HT2A (E6-5) - E03 (E8-6) L-W - W-B
HT2B (A7-1) - E03 (E8-6) L-W - W-B
HT1A (E8-24) - E03 (E8-6) B-W - W-B Heated oxygen sensor heater Engine switch on (IG) 9 to 14 V
HT1B (A7-2) - E03 (E8-6) Y-B - W-B
HT2A (E6-5) - E03 (E8-6) L-W - W-B
HT2B (A7-1) - E03 (E8-6) L-W - W-B
KNK1 (E7-28) - EKNK (E7-30) W - B Knock sensor (bank 1) Maintain engine RPM at 4,000 RPM after engine warmed-up Pulse generation (see  7 )
KNK2 (E7-29) - EKN2 (E7-31) R - G Knock sensor (bank 2) Maintain engine RPM at 4,000 RPM after engine warmed-up Pulse generation (see  7 )
TC (A7-3) - E1 (E7-7) V - BR Terminal TC of DLC3 Engine switch on (IG) 9 to 14 V
W (A7-8) - E1 (E7-7) R-L - BR MIL Idling 9 to 14 V
W (A7-8) - E1 (E7-7) R-L - BR MIL Engine switch on (IG) Below 3.0 V
VV1+ (E8-19) - VV1- (E8-18) R - G Variable Valve Timing (VVT) sensor (bank 1) Idling Pulse generation (see  8 )
VV2+ (E6-19) - VV2- (E6-18) Y - L VVT sensor (bank 2) Idling Pulse generation (see  8 )
OC1+ (E8-34) - OC1- (E8-33) R-B - L-R Camshaft timing control valve (OCV) (bank 1) Accelerate slowly after engine warmed-up Pulse generation (see  9 )
OC2+ (E6-9) - OC2- (E6-8) W - Y-B OCV (bank 2) Accelerate slowly after engine warmed-up Pulse generation (see  9 )
TACH (A7-16) - E1 (E7-7) W-L - BR Engine speed Idling Pulse generation (see waveform 10)
ACIS (E6-3) - E01 (E6-2) Y - W-B Vacuum switching valve (for ACIS) Engine switch on (IG) 9 to 14 V
ACIS (E6-3) - E01 (E6-2) Y - W-B Vacuum switching valve (for ACIS) Engine RPM: 2,500 to 4,000 RPM and throttle opening angle: 40% or more Below 3.0 V
M+ (E8-2) - ME01 (E8-4) B - BR Throttle actuator Idling Pulse generation (see  11 )
M- (E8-1) - ME01 (E8-4) W - BR Throttle actuator Idling Pulse generation (see  12 )
SPD (A6-22) - E1 (E7-7) V-W - BR Speed signal from combination meter Engine switch on (IG), rotate driving wheel slowly Pulse generation (see  13 )
RFC (A6-10) - E1 (E7-7) G-Y - BR Cooling fan ECU Engine switch on (IG) 0 to 3 V
E1 (E7-7) - Body ground BR - N/A Ground Always Below 1 Ω
VPMP (A7-12) - E1 (E7-7) LG - BR Vent valve (built into pump module) Engine switch on (IG) 9 to 14 V
MPMP (A7-5) - E1 (E7-7) P - BR Vacuum pump (built into pump module) Vacuum pump off 0 to 3 V
MPMP (A7-5) - E1 (E7-7) P - BR Vacuum pump (built into pump module) Vacuum pump on 9 to 14 V
PPMP (A7-25) - E1 (E7-7) V - BR Pressure sensor (built into pump module) Engine switch on (IG) 3 to 3.6 V
CANH (A6-25) - E1 (E7-7) R - BR CAN communication line Engine switch on (IG) Pulse generation (see  14 )
CANL (A6-24) - E1 (E7-7) W - BR CAN communication line Engine switch on (IG) Pulse generation (see  15 )
  1. WAVEFORM 1 
    Fig 2: Identifying Waveform 1 (Fuel Injector)
    G04026776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Fuel injector

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Item Content
    Symbols (Terminal No.) #1 (E8-15) - E01 (E6-2)
    #2 (E6-17) - E01 (E6-2)
    #3 (E8-14) - E01 (E6-2)
    #4 (E6-16) - E01 (E6-2)
    #5 (E8-13) - E01 (E6-2)
    #6 (E6-15) - E01 (E6-2)
    #7 (E8-12) - E01 (E6-2)
    #8 (E6-14) - E01 (E6-2)
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Idling

    HINT:

    The wavelength becomes shorter as engine RPM increases.

  2. WAVEFORM 2 
    1. Igniter IGT signal (from ECM to igniter)
    2. Igniter IGF signal (from igniter to ECM)
      Fig 3: Identifying Waveform 2 (Igniter IGT Signal)
      G04026777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Item Content
      Symbols (Terminal No.) (a) IGT1 (E8-17) - E1 (E7-7)
      (a) IGT2 (E6-13) - E1 (E7-7)
      (a) IGT3 (E8-16) - E1 (E7-7)
      (a) IGT4 (E6-12) - E1 (E7-7)
      (a) IGT5 (E8-27) - E1 (E7-7)
      (a) IGT6 (E6-11) - E1 (E7-7)
      (a) IGT7 (E8-26) - E1 (E7-7)
      (a) IGT8 (E6-10) - E1 (E7-7)
      (b) IGF1 (E6-7) - E1 (E7-7)
      (b) IGF2 (E6-6) - E1 (E7-7)
      Tester Range 2 V/DIV., 20 msec./DIV.
      Condition Idling

      HINT:

      The wavelength becomes shorter as engine RPM increases.

  3. WAVEFORM 3 
    1. Camshaft position sensor
    2. Crankshaft position sensor
      Fig 4: Identifying Waveform 3 Camshaft Position Sensor
      G04026778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Item Content
      Symbols (Terminal No.)
      1. G2 (E8-21) - G2- (E8-20)
      2. NE+ (E8-32) - NE- (E8-31)
      Tester Range 5 V/DIV., 20 msec./DIV.
      Condition Idle after engine warmed-up

      HINT:

      The wavelength becomes shorter as engine RPM increases.

  4. WAVEFORM 4 

    VSV (for EVAP)

    Fig 5: Identifying Waveform 4 VSV (For EVAP)
    G04026779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) PRG (E8-11) - E01 (E6-2)
    Tester Range 5 V/DIV., 50 msec./DIV.
    Condition Accelerated slowly after engine warmed-up

    HINT:

    In cases where the VSV (for EVAP) can be used to purge the EVAP, the waveform will not be displayed as shown in the illustration. In the DATA LIST, the item EVAP PURGE VSV shows the duty ratio of voltage flowing to the purge valve.

    Duty ratio for VSV (for EVAP) (%) = A/B x 100

  5. WAVEFORM 5 

    Heated oxygen sensor (sensor 1)

    Fig 6: Identifying Waveform 5 Heated Oxygen Sensor
    G04026780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) OX1A (E8-30) - O1A- (E8-25)
    OX2A (E6-28) - O2A- (E6-21)
    Tester Range 0.2 V/DIV., 200 msec./DIV.
    Condition Maintain engine speed at 2,500 RPM after engine warmed up

    HINT:

    In the DATA LIST, the items heated oxygen sensor B1 S1 and heated oxygen sensor B2 S1 show the ECM input values of the heated oxygen sensor (sensor 1).

  6. WAVEFORM 6 

    Heated oxygen sensor (sensor 2)

    Fig 7: Identifying Waveform 6 Heated Oxygen Sensor
    G04026781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) OX1B (A7-28) - O1B- (A7-29)
    OX2B (A7-17) - O2B- (A7-18)
    Tester Range 0.2 V/DIV., 200 msec./DIV.
    Condition Maintain engine speed at 2,500 RPM after engine warmed up

    HINT:

    In the DATA LIST, the items heated oxygen sensor B1 S2 and heated oxygen sensor B2 S2 show the ECM input values of the heated oxygen sensor (sensor 2).

  7. WAVEFORM 7 

    Knock sensor

    Fig 8: Identifying Waveform 7 Knock Sensor
    G04026782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) KNK1 (E7-28) - EKNK (E7-30)
    KNK2 (E7-29) - EKN2 (E7-31)
    Tester Range 1 V/DIV., 1 msec./DIV.
    Condition Maintain engine speed at 2,000 RPM after engine warmed-up

    HINT:

    • The wavelength becomes shorter as engine RPM increases.
    • The waveforms and amplitude displayed differ slightly depending on the vehicle.
  8. WAVEFORM 8 
    1. VVT sensor bank 1
    2. VVT sensor bank 2
    3. Crankshaft position sensor
      Fig 9: Identifying Waveform 8 Crankshaft Position Sensor
      G04026783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      ITEM CONTENT CHART

      Item Content
      Symbols (Terminal No.)
      1. VV1+ (E8-19) - VV1- (E8-18)
      2. VV2+ (E6-19) - VV2- (E6-18)
      3. NE+ (E8-32) - NE- (E8-31)
      Tester Range 2 V/DIV., 20 msec./DIV.
      Condition Idle after engine warmed-up

      HINT:

      The wavelength becomes shorter as engine RPM increases.

  9. WAVEFORM 9 

    VVT OCV

    Fig 10: Identifying Waveform 9 VVT OCV
    G04026784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) OC1+ (E8-34) - OC1- (E8-33)
    OC2+ (E6-9) - OC2- (E6-8)
    Tester Range 5 V/DIV., 200 msec./DIV.
    Condition Accelerated slowly after engine warmed-up

    HINT:

    In the DATA LIST, the items VVT OCV DUTY B1 and B2 show the duty ratio of voltage flowing to the OCV (see the illustration).

    VVT OCV DUTY B1, B2 = A/B x 100 (%)

  10. WAVEFORM 10 

    Engine speed signal

    Fig 11: Identifying Waveform 10 Engine Speed Signal
    G04026785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) TACH (A7-16) - E1 (E7-7)
    Tester Range 5 V/DIV., 10 msec./DIV.
    Condition Idling

    HINT:

    The wavelength becomes shorter as the engine RPM increases.

  11. WAVEFORM 11 

    Throttle actuator positive terminal

    Fig 12: Identifying Waveform 11 Throttle Actuator Positive Terminal
    G04026786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) M+ (E8-2) - ME01 (E8-4)
    Tester Range 5 V/DIV., 1 msec./DIV.
    Condition Idle after engine warmed-up

    HINT:

    The duty ratio varies depending on the throttle opening operation.

  12. WAVEFORM 12 

    Throttle actuator negative terminal

    Fig 13: Identifying Waveform 12 Throttle Actuator Negative Terminal
    G04026787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) M- (E8-1) - ME01 (E8-4)
    Tester Range 5 V/DIV., 1 msec./DIV.
    Condition Idle after engine warmed-up

    HINT:

    The duty ratio varies depending on the throttle opening operation.

  13. WAVEFORM 13 

    Vehicle speed signal

    Fig 14: Identifying Waveform 13 Vehicle Speed Signal
    G04026788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) SPD (A6-22) - E1 (E7-7)
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Driving at 20 km/h (12 mph)

    HINT:

    The wavelength becomes shorter as vehicle speed increases.

  14. WAVEFORM 14 

    CAN communication signal

    Fig 15: Identifying Waveform 14 CAN Communication Signal
    G04026789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) CANH (A6-25) - E1 (E7-7)
    Tester Range 1 V/DIV., 10 [mu] sec./DIV.
    Condition Stop engine and engine switch on (IG)

    HINT:

    The waveform varies depending on the CAN communication signal.

  15. WAVEFORM 15 

    CAN communication signal

    Fig 16: Identifying Waveform 15 CAN Communication Signal
    G04026790Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ITEM CONTENT CHART

    Item Content
    Symbols (Terminal No.) CANL (A6-24) - E1 (E7-7)
    Tester Range 1 V/DIV., 10 [mu] sec./DIV.
    Condition Stop engine and engine switch on (IG)

    HINT:

    The waveform varies depending on the CAN communication signal.

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