ECD SYSTEM TERMINALS OF ECM

  1. CHECK ECM

    A194498N10

    1. Measure the voltage, resistance or waveform of the ECM connector.

      Tip:

      The standard voltage, resistance and waveform of each ECM terminal is shown in the table below.

      In the table, first follow the information in "Condition". Look at "Terminal No. (Symbol)" for the terminals to be inspected. The standard voltage, resistance and waveform between the terminals is shown in "Specified Condition".

      Use the illustration above as a reference for the ECM terminals.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A118-1 (+B) - B164-109 (E1)

      B - BR

      Power source of ECM

      Ignition switch ON

      11 to 14 V

      A118-2 (BATT) - B164-109 (E1)

      W - BR

      Battery (for measuring the battery voltage and for the ECM memory)

      Always

      11 to 14 V

      A118-4 (CANN) - B164-109 (E1)

      SB - BR

      CAN communication line

      Ignition switch ON

      Pulse generation

      (See waveform 1)

      A118-5 (CANP) - B164-109 (E1)

      B - BR

      CAN communication line

      Ignition switch ON

      Pulse generation

      (See waveform 2)

      A118-6 (CANL) - B164-109 (E1)

      W - BR

      CAN communication line

      Ignition switch ON

      Pulse generation

      (See waveform 1)

      A118-7 (CANH) - B164-109 (E1)

      B - BR

      CAN communication line

      Ignition switch ON

      Pulse generation

      (See waveform 2)

      A118-12 (W) - B164-109 (E1)

      LG - BR

      MIL

      MIL illuminated

      Below 3 V

      MIL not illuminated

      11 to 14 V

      A118-13 (TACH) - B164-109 (E1)

      GR - BR

      Engine speed

      Idling

      Pulse generation

      (See waveform 3)

      A118-14 (SPD) - B164-109 (E1)

      V - BR

      Speed signal from combination meter

      Ignition switch ON, drive wheels rotating slowly

      Pulse generation

      (See waveform 4)

      A118-20 (+B2) - B164-109 (E1)

      B - BR

      Power source of ECM

      Ignition switch ON

      11 to 14 V

      A118-21 (FANH) - B164-109 (E1)

      W - BR

      FAN NO. 1, 2 relay

      Idling with high engine coolant temperature

      Below 1.5 V

      A118-22 (FANL) - B164-109 (E1)

      R - BR

      FAN NO. 3 relay

      Ignition switch ON

      11 to 14 V

      Idling with A/C on

      or high engine coolant temperature

      Below 1.5 V

      A118-25 (IGSW) - B164-109 (E1)

      B - BR

      Ignition switch

      Ignition switch ON

      11 to 14 V

      A118-26 (TC) - B164-109 (E1)

      P - BR

      Terminal TC of DLC3

      Ignition switch ON

      11 to 14 V

      A118-34 (ST1-) - B164-109 (E1)

      R - BR

      Stop light switch assembly

      Ignition switch ON, brake pedal depressed

      Below 1.5 V

      Ignition switch ON, brake pedal released

      7.5 to 14 V

      A118-35 (STP) - B164-109 (E1)

      L - BR

      Stop light switch assembly

      Ignition switch ON, brake pedal depressed

      7.5 to 14 V

      Ignition switch ON, brake pedal released

      Below 1.5 V

      A118-43 (STA) - B164-109 (E1)

      LG - BR

      Starter signal

      Cranking

      5.5 V or higher

      A118-44 (IREL) - B164-109 (E1)

      G - BR

      EDU relay

      Idling

      0 to 1.5 V

      A118-45 (MREL) - B164-109 (E1)

      GR - BR

      EFI-MAIN relay

      Ignition switch ON

      11 to 14 V

      2 seconds elapsed since ignition switch off

      0 to 1.5 V

      A118-53 (VPA) - A118-56 (EPA)

      W - Y

      Accelerator pedal sensor assembly (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

      A118-54 (VPA2) - A118-58 (EPA2)

      R - P

      Accelerator pedal sensor assembly (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

      A118-55 (VCPA) - A118-56 (EPA)

      B - Y

      Power source of accelerator pedal sensor assembly (for VPA1)

      Ignition switch ON

      4.5 to 5.5 V

      A118-57 (VCP2) - A118-58 (EPA2)

      L - P

      Power source of accelerator pedal sensor assembly (for VPA2)

      Ignition switch ON

      4.5 to 5.5 V

      A118-60 (NEO) - B164-109 (E1)

      L - BR

      Camshaft position sensor signal

      Idling with warm engine

      Pulse generation

      (See waveform 5)

      B164-27 (GLDO) - B164-109 (E1)

      R - BR

      Glow plug controller

      Glow plug on

      Pulse generation

      B164-41 (PCV+) - B164-81 (PCV-)

      R - W

      Suction control valve

      Idling or cranking with warm engine

      Pulse generation

      (See waveform 6)

      B164-42 (M+) - B164-84 (ME01)

      P - W-B

      Throttle valve duty signal

      Engine warmed up, engine racing

      Pulse generation

      B164-43 (M-) - B164-84 (ME01)

      L - W-B

      Throttle valve duty signal

      Engine warmed up, engine racing

      Pulse generation

      B164-44 (E02) - Body ground

      W-B - -

      Earth (ground) circuit of ECM

      Always

      Below 1 Ω

      B164-45 (E01) - Body ground

      W-B - -

      Earth (ground) circuit of ECM

      Always

      Below 1 Ω

      B164-46 (E05) - Body ground

      W-B - -

      Earth (ground) circuit of ECM

      Always

      Below 1 Ω

      B164-47 (#4) - B164-109 (E1)

      R - BR

      Injector assembly

      Idling

      Pulse generation

      (See waveform 7)

      B164-48 (#3) - B164-109 (E1)

      B - BR

      B164-49 (#2) - B164-109 (E1)

      G - BR

      B164-50 (#1) - B164-109 (E1)

      GR - BR

      B164-51 (INJF) - B164-109 (E1)

      P - BR

      Injector driver (EDU)

      Idling

      Pulse generation

      (See waveform 8)

      B164-52 (PRD) - B164-109 (E1)

      L - BR

      Pressure discharge valve drive signal

      Engine warmed up, engine racing

      Pulse generation

      (See waveform 9)

      B164-54 (ALT) - B164-109 (E1)

      L - BR

      Generator assembly duty ratio

      Idling

      Pulse generation

      (See waveform 10)

      B164-56 (GLDI) - B164-109 (E1)

      V - BR

      Glow plug controller

      Glow plug on

      Pulse generation

      B164-58 (GREL) - B164-109 (E1)

      L - BR

      Glow plug relay assembly

      Ignition switch ON

      11 to 14 V

      B164-62 (IDLO) - B164-109 (E1)

      W - BR

      Injector driver (EDU)

      Idling

      4 to 5.5 V

      B164-65 (VG) - B164-64 (EVG)

      LG - BR

      Mass air flow meter assembly power source

      Ignition switch ON

      Pulse generation

      B164-66 (PCR1) - B164-67 (E2M)

      P - V

      Fuel pressure sensor (main)

      Idling

      1.8 to 2.1 V

      B164-68 (VCM) - B164-67 (E2M)

      W - V

      Power source of fuel pressure sensor (for PCR1)

      Ignition switch ON

      4.5 to 5.5 V

      B164-69 (VCS) - B164-91 (E2S)

      R - G

      Power source of fuel pressure sensor (for PCR2)

      Ignition switch ON

      4.5 to 5.5 V

      B164-75 (VCPM) - B164-72 (EPIM)

      R - Y

      Power source of manifold absolute pressure sensor

      Ignition switch ON

      4.5 to 5.5 V

      B164-75 (VCPM) - B164-74 (EPEX)

      R - G

      Power source of differential pressure sensor assembly

      Ignition switch ON

      4.5 to 5.5 V

      B164-76 (THCF) - B164-77 (ETCF)

      P - V

      Exhaust gas temperature sensor

      Engine warmed up, idling

      4.6 to 4.9 V

      B164-78 (VCG) - B164-109 (E1)

      B - BR

      Power source of camshaft position sensor

      Ignition switch ON

      4.5 to 5.5 V

      B164-80 (G2+) - B164-79 (G2-)

      R - W

      Camshaft position sensor

      Idling

      Pulse generation

      (See waveform 11)

      B164-82 (GE01) - Body ground

      BR - -

      Shielded earth (ground) circuit of throttle actuator

      Always

      Below 1 Ω

      B164-83 (EOPV) - B164-109 (E1)

      L - BR

      Oil pressure switching valve assembly

      Idling

      Below 1.5 V

      B164-85 (EGM-) - B164-84 (ME01)

      W - W-B

      Electric EGR control valve assembly duty signal

      Engine warmed up, idling

      Pulse generation

      B164-86 (EGM+) - B164-84 (ME01)

      B - W-B

      Electric EGR control valve assembly duty signal

      Engine warmed up, idling

      Pulse generation

      B164-93 (VPOP) - B164-70 (EPOP)

      B - W

      Power source of oil pressure sender gauge assembly

      Ignition switch ON

      4.5 to 5.5 V

      B164-94 (VCEG) - B164-95 (EEGL)

      G - R

      EGR valve position sensor

      Ignition switch ON

      4.5 to 5.5 V

      B164-97 (VCVL) - B164-96 (EVLU)

      B - W

      Throttle position sensor

      Ignition switch ON

      4.98 to 5.02 V

      B164-98 (PEX) - B164-74 (EPEX)

      L - G

      Differential pressure sensor assembly

      Ignition switch ON

      0.4 to 4.8 V

      B164-101 (VNVC) - B164-100 (VNE2)

      B - Y

      Power source of nozzle vane position sensor

      Ignition switch ON

      4.5 to 5.5 V

      B164-103 (NE+) - B164-102 (NE-)

      R - G

      Crankshaft position sensor

      Idling

      Pulse generation

      (See waveform 11)

      B164-104 (HAF2) - B164-46 (E05)

      G - W-B

      Air fuel ratio sensor heater

      Ignition switch ON

      11 to 14 V

      B164-105 (FIV) - B164-109 (E1)

      B - BR

      Exhaust fuel addition injector assembly

      Engine warmed up, idling, every 1 to 2 minutes

      Pulse generation

      B164-106 (ECBV) - B164-109 (E1)

      Y - BR

      No. 1 vacuum switching valve assembly (for EGR cooler)

      No. 1 vacuum switching valve assembly (for EGR cooler) on

      Below 1.5 V

      No. 1 vacuum switching valve assembly (for EGR cooler) off

      11 to 14 V

      B164-107 (M-) - B164-109 (E1)

      R - BR

      DC motor (turbocharger sub-assembly)

      Idling with warm engine

      Pulse generation

      (See waveform 12)

      B164-108 (M+) - B164-109 (E1)

      W - BR

      DC motor (turbocharger sub-assembly)

      Idling with warm engine

      Pulse generation

      (See waveform 12)

      B164-109 (E1) - Body ground

      BR - -

      Earth (ground) circuit of ECM

      Always

      Below 1 Ω

      B164-110 (THA) - B164-87 (ETHA)

      L - BR

      Intake air temperature sensor

      Idling, intake air temperature 0 to 80°C (32 to 176°F)

      0.5 to 3.4 V

      B164-111 (THW) - B164-88 (ETHW)

      B - BR

      Engine coolant temperature sensor

      Idling, engine coolant temperature 60 to 120°C (140 to 248°F)

      0.2 to 1.0 V

      B164-112 (THF) - B164-89 (ETHF)

      GR - BR

      Fuel temperature sensor

      Ignition switch ON

      0.5 to 3.4 V

      B164-113 (THIA) - B164-90 (ETHI)

      Y - G

      Intake air temperature sensor (turbo)

      Idling, intake air temperature at 0 to 80°C (32 to 176°F)

      0.5 to 3.4 V

      B164-114 (PCR2) - B164-91 (E2S)

      GR - G

      Fuel pressure sensor (sub)

      Idling

      1.2 to 1.5 V

      B164-116 (POP) - B164-70 (EPOP)

      G - W

      Oil pressure sender gauge assembly

      Idling

      0.1 to 0.9 V

      B164-117 (PIM) - B164-72 (EPIM)

      G - Y

      Manifold absolute pressure sensor

      Negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) applied

      0.3 to 0.9 V

      Atmospheric pressure

      0.8 to 1.4 V

      Positive pressure of 69 kPa (518 mmHg, 20.3 in.Hg) applied

      1.6 to 2.2 V

      B164-118 (EGLS) - B164-95 (EEGL)

      L - R

      EGR valve position sensor

      Ignition switch ON

      1.03 to 1.37 V

      B164-119 (VLU) - B164-96 (EVLU)

      LG - W

      Throttle position sensor

      Ignition switch ON, throttle valve fully opened

      3.6 to 4.2 V

      B164-121 (THCO) - B164-120 (ETCO)

      P - BR

      No. 3 Exhaust gas temperature sensor

      Engine warmed up, idling

      4.6 to 4.9 V

      B164-122 (THCI) - B164-99 (ETCI)

      L - BR

      No. 2 Exhaust gas temperature sensor

      Engine warmed up, idling

      4.6 to 4.9 V

      B164-123 (RLFF) - B164-109 (E1)

      V - BR

      Pressure discharge valve confirmation signal

      Engine warmed up, engine racing

      Pulse generation

      (See waveform 9)

      B164-124 (VNA) - B164-100 (VNE2)

      G - Y

      Nozzle vane position sensor

      Ignition switch ON

      2.3 to 2.7 V

      B164-125 (AF2+) - B164-46 (E05)

      L - W-B

      Air fuel ratio sensor

      Ignition switch ON

      2.0 to 2.5 V

      B164-126 (AF2-) - B164-46 (E05)

      Y - W-B

      Air fuel ratio sensor

      Ignition switch ON

      2.0 to 2.5 V
    2. A283577E01

      Using an oscilloscope, check waveform 1.

      Waveform 1

      CAN Communication Signal

      ECM Terminal Name

      Between CANL and E1

      Between CANN and E1

      Tester Range

      1 V/DIV., 10 μs./DIV.

      Condition

      Ignition switch ON
      Tip:

      The waveform varies depending on the CAN communication signal.

    3. A283576E01

      Using an oscilloscope, check waveform 2.

      Waveform 2

      CAN Communication Signal

      ECM Terminal Name

      Between CANH and E1

      Between CANP and E1

      Tester Range

      1 V/DIV., 10 μs./DIV.

      Condition

      Ignition switch ON
      Tip:

      The waveform varies depending on the CAN communication signal.

    4. A283574E01

      Using an oscilloscope, check waveform 3.

      Waveform 3

      Engine Speed Signal

      ECM Terminal Name

      Between TACH and E1

      Tester Range

      5 V/DIV., 10 ms./DIV.

      Condition

      Idling
      Tip:

      The wavelength becomes shorter as the engine speed increases.

    5. A283573E01

      Using an oscilloscope, check waveform 4.

      waveform 4

      Vehicle Speed Signal

      ECM Terminal Name

      Between SPD and E1

      Tester Range

      5 V/DIV., 20 ms./DIV.

      Condition

      Ignition switch ON, driving wheels rotating slowly
      Tip:

      The wavelength becomes shorter as the vehicle speed increases.

    6. A287796E03

      Using an oscilloscope, check waveform 5.

      waveform 5

      Vehicle Speed Signal

      ECM Terminal Name

      Between NEO and E1

      Tester Range

      1 V/DIV., 2 ms./DIV.

      Condition

      Idling with warm engine
      Tip:

      The wavelength becomes shorter as the vehicle speed increases.

    7. A294242E02

      Using an oscilloscope, check waveform 6.

      Waveform 6

      Suction Control Valve Signal

      ECM Terminal Name

      Between PCV+ and PCV-

      Tester Range

      10 V/DIV., 5 ms./DIV.

      Condition

      Idling or cranking with warm engine
      Tip:

      The waveform varies depending on the suction control valve operation.

    8. A208447E03

      Using an oscilloscope, check waveform 7.

      Waveform 7

      No. 1 Injector Assembly Injection Signal

      No. 2 Injector Assembly Injection Signal

      No. 3 Injector Assembly Injection Signal

      No. 4 Injector Assembly Injection Signal

      ECM Terminal Name

      (a) Between #1 and E1

      (b) Between #3 and E1

      (c) Between #4 and E1

      (d) Between #2 and E1

      Tester Range

      5 V/DIV., 20 ms./DIV.

      Condition

      Idling
      Tip:

      The waveform varies depending on the injector injection.

    9. A208448E02

      Using an oscilloscope, check waveform 8.

      Waveform 8

      Injector Injection Confirmation Signal

      ECM Terminal Name

      Between INJF and E1

      Tester Range

      2 V/DIV., 20 ms./DIV.

      Condition

      Idling
      Tip:

      The waveform varies depending on the injector injection.

    10. A243948E02

      Using an oscilloscope, check waveform 9.

      Waveform 9

      Pressure Discharge Valve Drive Signal and Pressure Discharge Confirmation Signal

      ECM Terminal Name

      (a) Between PRD and E1

      (b) Between RLFF and E1

      Tester Range

      2 V/DIV., 1 ms./DIV.

      Condition

      Engine warmed up, engine racing
      Tip:

      The waveform becomes shorter as the engine speed.

    11. A295303E01

      Using an oscilloscope, check waveform 10.

      Waveform 10

      Generator Assembly Signal

      ECM Terminal Name

      Between ALT and E1

      Tester Range

      5 V/DIV., 5 ms./DIV.

      Condition

      Idling
    12. A268870E02

      Using an oscilloscope, check waveform 11.

      Waveform 11

      Crankshaft Position Sensor and Camshaft Position Sensor Signal

      ECM Terminal Name

      (a) Between NE+ and NE-

      (b) Between G2+ and G2-

      Tester Range

      5 V/DIV., 20 ms./DIV.

      Condition

      Idling
      Tip:

      The waveform varies depending on the engine speed.

    13. A148021E07

      Using an oscilloscope, check waveform 12.

      Waveform 12

      DC Motor Positive Terminal and DC Motor Negative Terminal

      ECM Terminal Name

      Between M+ and E1

      Between M- and E1

      Tester Range

      5 V/DIV., 50 ms./DIV.

      Condition

      Idling with warm engine
      Tip:

      The waveform varies depending on turbocharger sub-assembly operation.