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Terminals Of ECM

Fig 1: Identifying ECM Connector Terminal
G05285432Courtesy 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
STSW (A6-19) - E1 (E7-7) Y-B - BR Starter switch Shift lever position P or N, Engine switch on (START) 9 to 14 V
#1 (E8-15) - E01 (E6-2) Y-B - W-B Injector Idling Pulse generation (see  1waveform 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) G-W - W-B      
#8 (E6-14) - E01 (E6-2) B-L - 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  2waveform 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  2waveform 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  3waveform 3)
NE+ (E8-32) - NE - (E8-31) R - G Crankshaft position sensor Idling Pulse generation (see  3waveform 3 and  88)
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
STAR (E7-4) - E1 (E7-7) L-Y - BR STARTER Relay Engine switch on (START), Shift lever position other than P and N 9 to 14 V
STAR (E7-4) - E1 (E7-7) L-Y - BR STARTER Relay Engine switch on (START), Shift lever position in P or N Below 3.0 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  4waveform 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  5waveform 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  6waveform 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  7waveform 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  7waveform 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  8waveform 8)
VV2+ (E6-19) - VV2 - (E6-18) Y-L VVT sensor (bank 2) Idling Pulse generation (see  8waveform 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  9waveform 9)
OC2+ (E6-9) - OC2- (E6-8) W - Y-B OCV (bank 2) Accelerate slowly after engine warmed-up Pulse generation (see  9waveform 9)
TACH (A7-16) - E1 (E7-7) W-L - BR Engine speed Idling Pulse generation (see  10waveform 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  11waveform 11)
M- (E8-1) - ME01 (E8-4) W - BR Throttle actuator Idling Pulse generation (see  12waveform 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  13waveform 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) B - BR CAN communication line Engine switch on (IG) Pulse generation (see  14waveform 14)
CANL (A6-24) - E1 (E7-7) W - BR CAN communication line Engine switch on (IG) Pulse generation (see  15waveform 15)
  1. WAVEFORM 1 

    Fuel injector

    WAVEFORM REFERENCE

    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 20 V/DIV., 20 msec./DIV.
    Condition Idling

    HINT:

    The wavelength becomes shorter as engine rpm increases.

    Fig 2: Identifying Waveform 1 (Fuel Injector)
    G05285433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. WAVEFORM 2 
    1. Igniter IGT signal (from ECM to igniter)
    2. Igniter IGF signal (from igniter to ECM)
    WAVEFORM REFERENCE

    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 20 V/DIV., 20 msec./DIV.
    Condition Idling

    HINT:

    The wavelength becomes shorter as engine rpm increases.

    Fig 3: Identifying Waveform 2 (Igniter IGT Signal)
    G05291267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. WAVEFORM 3 
    1. Camshaft position sensor
    2. Crankshaft position sensor
    WAVEFORM REFERENCE

    Item Content
    Symbols (Terminal No.) (a) G2 (E8-21) - G2- (E8-20)
    (b) 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.

    Fig 4: Identifying Waveform 3 (Camshaft Position Sensor)
    G05291268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. WAVEFORM 4 

    VSV (for EVAP)

    WAVEFORM REFERENCE

    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

    Fig 5: Identifying Waveform 4 VSV (For EVAP)
    G05291269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. WAVEFORM 5 

    Heated oxygen sensor (sensor 1)

    WAVEFORM REFERENCE

    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).

    Fig 6: Identifying Waveform 5 (Heated Oxygen Sensor 1)
    G05291270Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. WAVEFORM 6 

    Heated oxygen sensor (sensor 2)

    WAVEFORM REFERENCE

    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).

    Fig 7: Identifying Waveform 6 (Heated Oxygen Sensor 2)
    G05197710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. WAVEFORM 7 

    Knock sensor

    WAVEFORM REFERENCE

    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.
    Fig 8: Identifying Waveform 7 (Knock Sensor)
    G05291272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. WAVEFORM 8 
    1. VVT sensor bank 1
    2. VVT sensor bank 2
    3. Crankshaft position sensor
    WAVEFORM REFERENCE

    Item Content
    Symbols (Terminal No.) (a) VV1+ (E8-19) - VV1- (E8-18)
    (b) VV2+ (E6-19) - VV2- (E6-18)
    (c) 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.

    Fig 9: Identifying Waveform 8 (Crankshaft Position Sensor)
    G05285440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. WAVEFORM 9 

    VVT OCV

    WAVEFORM REFERENCE

    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 (%)

    Fig 10: Identifying Waveform 9 (VVT OCV)
    G05291274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. WAVEFORM 10 

    Engine speed signal

    WAVEFORM REFERENCE

    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.

    Fig 11: Identifying Waveform 10 (Engine Speed Signal)
    G05197719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. WAVEFORM 11 

    Throttle actuator positive terminal

    WAVEFORM REFERENCE

    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.

    Fig 12: Identifying Waveform 11 (Throttle Actuator Positive Terminal)
    G05197717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. WAVEFORM 12 

    Throttle actuator negative terminal

    WAVEFORM REFERENCE

    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.

    Fig 13: Identifying Waveform 12 (Throttle Actuator Negative Terminal)
    G05285444Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. WAVEFORM 13 

    Vehicle speed signal

    WAVEFORM REFERENCE

    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.

    Fig 14: Identifying Waveform 13 (Vehicle Speed Signal)
    G05197716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. WAVEFORM 14 

    CAN communication signal

    WAVEFORM REFERENCE

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

    HINT:

    The waveform varies depending on the CAN communication signal.

    Fig 15: Identifying Waveform 14 (CAN Communication Signal)
    G05196597Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. WAVEFORM 15 

    CAN communication signal

    WAVEFORM REFERENCE

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

    HINT:

    The waveform varies depending on the CAN communication signal.

    Fig 16: Identifying Waveform 15 (CAN Communication Signal)
    G05196598Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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