ECD SYSTEM(for DPF) TERMINALS OF ECM

  1. CHECK ECM

    A194498E38

    1. Measure the voltage according to the value(s) in the table below.

      Tip:

      The standard voltage 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 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

      A61-2 (BATT) - B76-109 (E1)

      W - BR

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

      Always

      11 to 14 V

      A61-25 (IGSW) - B76-109 (E1)

      B - BR

      Ignition switch

      Ignition switch ON

      11 to 14 V

      A61-1 (+B) - B76-109 (E1)

      B - BR

      Power source of ECM

      Ignition switch ON

      11 to 14 V

      A61-20 (+B2) - B76-109 (E1)

      B - BR

      Power source of ECM

      Ignition switch ON

      11 to 14 V

      A61-45 (MREL) - B76-109 (E1)

      B - BR

      EFI MAIN relay

      Ignition switch ON

      11 to 14 V

      2 seconds elapsed after ignition switch off

      0 to 1.5 V

      A61-44 (IREL) - B76-109 (E1)

      R - BR

      EDU relay

      Ignition switch ON

      0 to 1.5 V

      B76-58 (GREL) - B76-109 (E1)

      B - BR

      Glow plug relay

      Cranking

      11 to 14 V

      Idling (10 minutes or more after engine start)

      0 to 1.5 V

      A61-53 (VPA) - A61-56 (EPA)

      Y - W

      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

      3.0 to 4.6 V

      A61-54 (VPA2) - A61-58 (EPA2)

      P - R

      Accelerator pedal position sensor (for sensor malfunction detection)

      Ignition switch ON, accelerator pedal fully released

      0.9 to 2.3 V

      Ignition switch ON, accelerator pedal fully depressed

      3.4 to 5.0 V

      A61-55 (VCPA) - A61-56 (EPA)

      B - W

      Power source of accelerator pedal position sensor (for VPA1)

      Ignition switch ON

      4.5 to 5.5 V

      A61-57 (VCP2) - A61-58 (EPA2)

      L - R

      Power source of accelerator pedal position sensor (for VPA2)

      Ignition switch ON

      4.5 to 5.5 V

      A61-43 (STA) - B76-109 (E1)

      SB - BR

      Starter signal

      Cranking

      6.0 V or higher

      B76-51 (INJF) - B76-109 (E1)

      P - BR

      EDU

      Idling

      Pulse generation

      (See waveform 3)

      B76-50 (#1) - B76-109 (E1)

      GR - BR

      Injector

      Idling

      Pulse generation

      (See waveform 2)

      B76-49 (#2) - B76-109 (E1)

      G - BR

      B76-48 (#3) - B76-109 (E1)

      LG - BR

      B76-47 (#4) - B76-109 (E1)

      L - BR

      B76-52 (PRD) - B76-109 (E1)

      B - BR

      Pressure discharge valve drive signal

      Ignition switch off

      4 to 5.5 V

      B76-62 (IDLO) - B76-109 (E1)

      Y - BR

      EDU

      Idling

      4 to 5.5 V

      B76-103 (NE+) - B76-102 (NE-)

      W - B

      Crankshaft position sensor

      Idling

      Pulse generation

      (See waveform 4)

      B76-80 (G+) - B76-79 (G-)

      R - G

      Camshaft position sensor

      Idling

      Pulse generation

      (See waveform 4)

      A61-35 (STP) - B76-109 (E1)

      L - BR

      Stop light switch

      Ignition switch ON, brake pedal depressed

      7.5 to 14 V

      Ignition switch ON, brake pedal released

      0 to 1.5 V

      A61-34 (ST1-) - B76-109 (E1)

      GR - BR

      Stop light switch

      Ignition switch ON, brake pedal depressed

      0 to 1.5 V

      Ignition switch ON, brake pedal released

      7.5 to 14 V

      A61-26 (TC) - B76-109 (E1)

      G - BR

      Terminal TC of DLC3

      Ignition switch ON

      11 to 14 V

      A61-12 (W) - B76-109 (E1)

      R - BR

      MIL

      MIL illuminated

      0 to 3 V

      MIL not illuminated

      11 to 14 V

      A61-14 (SPD) - B76-109 (E1)

      V- BR

      Speed signal from combination meter

      Ignition switch ON, drive wheels rotating slowly

      Pulse generation

      (See waveform 6)

      B76-93 (VCPM) - B76-72 (EPIM)

      V- BR

      Power source of manifold absolute pressure sensor

      Ignition switch ON

      4.5 to 5.5 V

      B76-117 (PIM) - B76-72 (EPIM)

      G- BR

      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

      A61-13 (TACH) - B76-109 (E1)

      GR - BR

      Engine speed

      Idling

      Pulse generation

      (See waveform 7)

      B76-68 (VCM) - B76-67 (E2M)

      V - BR

      Fuel pressure sensor

      Ignition switch ON

      4.5 to 5.5 V

      B76-69 (VCS) - B76-91 (E2S)

      R - L

      Fuel pressure sensor

      Ignition switch ON

      4.5 to 5.5 V

      B76-66 (PCR1) - B76-67 (E2M)

      P - BR

      Fuel pressure sensor (main)

      Idling

      1.8 to 2.1 V

      B76-114 (PCR2) - B76-91 (E2S)

      W - L

      Fuel pressure sensor (sub)

      Idling

      1.2 to 1.5 V

      B76-54 (ALT) - B76-109 (E1)

      B - BR

      Generator duty ratio

      Idling

      Pulse generation

      (See waveform 8)

      B76-41 (PCV+) - B76-81 (PCV-)

      LG - R

      Suction control valve

      Idling

      Pulse generation

      (See waveform 1)

      B76-83 (VN) - B76-109 (E1)

      Y - BR

      Vacuum regulating valve assembly (for turbocharger control)

      Idling

      Pulse generation

      (See waveform 5)

      B76-105 (FIV) - B76-109 (E1)

      GR - BR

      Exhaust fuel addition injector

      Engine warmed up, idling, every 1 to 2 minutes

      Pulse generation

      B76-97 (VCVL) - B76-96 (EVLU)

      W - BR

      Throttle position sensor

      Ignition switch ON

      4.5 to 5.5 V

      B76-119 (VLU) - B76-96 (EVLU)

      G - BR

      Throttle position sensor

      Ignition switch ON, throttle valve fully opened

      2.8 to 3.8 V

      B76-42 (M+) - B76-84 (ME01)

      V - W-B

      Throttle valve duty signal

      Engine warmed up, engine racing

      Pulse generation

      B76-43 (M-) - B76-84 (ME01)

      P - W-B

      Throttle valve duty signal

      Engine warmed up, engine racing

      Pulse generation

      B76-94 (VCEG) - B76-95 (EEGL)

      W - BR

      EGR valve position sensor

      Ignition switch ON

      4.5 to 5.5 V

      B76-118 (EGLS) - B76-95 (EEGL)

      GR - BR

      EGR valve position sensor

      Ignition switch ON

      1.03 to 1.37 V

      B76-86 (EGM+) - B76-84 (ME01)

      W - W-B

      EGR valve duty signal

      Engine warmed up, idling

      Pulse generation

      B76-85 (EGM-) - B76-84 (ME01)

      B - W-B

      EGR valve duty signal

      Engine warmed up, idling

      Pulse generation

      B76-122 (THCI) - B76-99 (ETCI)

      L - BR

      Exhaust gas temperature sensor

      Engine warmed up, idling

      4.6 to 4.9 V

      B76-121 (THCO) - B76-120 (ETCO)

      P - BR

      Exhaust gas temperature sensor

      Engine warmed up, idling

      4.6 to 4.9 V

      B76-113 (THIA) - B76-90 (ETHI)

      Y- BR

      Intake air temperature sensor (turbo)

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

      0.5 to 3.4 V

      B76-112 (THF) - B76-89 (ETHF)

      GR - BR

      Fuel temperature sensor

      Ignition switch ON

      0.5 to 3.4 V

      B76-111 (THW) - B76-88 (ETHW)

      B - BR

      Engine coolant temperature sensor

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

      0.2 to 1.0 V

      B76-93 (VCPM) - B76-74 (EPEX)

      V - BR

      Power source of differential pressure sensor

      Ignition switch ON

      4.5 to 5.5 V

      B76-98 (PEX) - B76-74 (EPEX)

      P - BR

      Differential pressure sensor

      Ignition switch ON

      0.4 to 4.8 V

      B76-104 (HAF2) - B76-46 (E05)

      L - W-B

      Air fuel ratio sensor heater

      Ignition switch ON

      11 to 14 V

      B76-125 (AF2+) - B76-46 (E05)

      L - W-B

      Air fuel ratio sensor

      Ignition switch ON

      2.0 to 2.5 V

      B76-126 (AF2-) - B76-46 (E05)

      Y - W-B

      Air fuel ratio sensor

      Ignition switch ON

      2.0 to 2.5 V

      B76-65 (VG) - B76-64 (EVG)

      R - G

      MAF meter power source

      Ignition switch ON

      Pulse generation

      B76-110 (THA) - B76-87 (ETHA)

      W - BR

      Intake air temperature sensor

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

      0.5 to 3.4 V

      A61-22 (FANL) - B76-109 (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

      A61-21 (FANH) - B76-109 (E1)

      W - BR

      FAN NO. 1, 2 relay

      Idling with high engine coolant temperature

      Below 1.5 V

      A61-7 (CANH) - B76-109 (E1)

      Y - BR

      CAN communication line

      Ignition switch ON

      Pulse generation

      (See waveform 9)

      A61-6 (CANL) - B76-109 (E1)

      W - BR

      CAN communication line

      Ignition switch ON

      Pulse generation

      (See waveform 10)
    2. A208446E01

      Using an oscilloscope, check waveform 1.

      Waveform 1

      Suction control valve signal

      Item

      Content

      Terminal No. (Symbol)

      B76-41 (PCV+) - B76-81 (PCV-)

      Tool Setting

      10 V/DIV., 5 msec./DIV.

      Condition

      Idling or cranking with warm engine
      Tip:

      The waveform varies depending on the suction control valve operation.

    3. A208447E01

      Using an oscilloscope, check waveform 2.

      Waveform 2

      No. 1 injector injection signal

      No. 2 injector injection signal

      No. 3 injector injection signal

      No. 4 injector injection signal

      Item

      Content

      Terminal No. (Symbol)

      (a) B76-50 (#1) - B76-109 (E1)

      (b) B76-48 (#3) - B76-109 (E1)

      (c) B76-47 (#4) - B76-109 (E1)

      (d) B76-49 (#2) - B76-109 (E1)

      Tool Setting

      5 V/DIV., 20 msec./DIV.

      Condition

      Idling with warm engine
      Tip:

      The waveform varies depending on the injector injection.

    4. A208448E01

      Using an oscilloscope, check waveform 3.

      Waveform 3

      Injector injection confirmation signal

      Item

      Content

      Terminal No. (Symbol)

      B76-51 (INJF) - B76-109 (E1)

      Tool Setting

      2 V/DIV., 20 msec./DIV.

      Condition

      Idling with warm engine
      Tip:

      The waveform varies depending on the injector injection.

    5. A208449E01

      Using an oscilloscope, check waveform 4.

      Waveform 4

      Crankshaft position sensor signal

      Camshaft position sensor signal

      Item

      Content

      Terminal No. (Symbol)

      (a) B76-103 (NE+) - B76-102 (NE-)

      (b) B76-80 (G+) - B76-79 (G-)

      Tool Setting

      5 V/DIV., 20 msec./DIV.

      Condition

      Idling with warm engine
      Tip:

      The waveform varies depending on the engine speed.

    6. A284201E01

      Using an oscilloscope, check waveform 5.

      Waveform 5

      VRV for turbocharger control signal

      Item

      Content

      Terminal No. (Symbol)

      B76-83 (VN) - B76-109 (E1)

      Tool Setting

      5 V/DIV., 1 msec./DIV.

      Condition

      Idling with warm engine
      Tip:

      The waveform changes depending on the electric vacuum regulating valve for turbocharger operation.

    7. A284202E01

      Using an oscilloscope, check waveform 6.

      Waveform 6

      Vehicle speed signal

      Item

      Content

      Terminal No. (Symbol)

      A61-14 (SPD) - B76-109 (E1)

      Tool Setting

      5 V/DIV., 20 msec./DIV.

      Condition

      Driving vehicle
      Tip:

      The wavelength becomes shorter as the vehicle speed increases.

    8. A284203E01

      Using an oscilloscope, check waveform 7.

      Waveform 7

      Engine speed signal

      Item

      Content

      Terminal No. (Symbol)

      A61-13 (TACH) - B76-109 (E1)

      Tool Setting

      5 V/DIV., 20 msec./DIV.

      Condition

      Idling with warm engine
      Tip:

      The wavelength becomes shorter as the engine speed increases.

    9. A284204E01

      Using an oscilloscope, check waveform 8.

      Waveform 8

      Generator signal

      Item

      Content

      Terminal No. (Symbol)

      B76-54 (ALT) - B76-109 (E1)

      Tool Setting

      5 V/DIV., 5 msec./DIV.

      Condition

      Idling
    10. A284205E01

      Using an oscilloscope, check waveform 9.

      Waveform 9

      CAN communication signal

      Item

      Content

      Terminal No. (Symbol)

      A61-7 (CANH) - B76-109 (E1)

      Tool Setting

      1 V/DIV., 10 μsec./DIV.

      Condition

      Engine stopped and ignition switch ON
      Tip:

      The waveform varies depending on the CAN communication signal.

    11. A284206E01

      Using an oscilloscope, check waveform 10.

      Waveform 10

      CAN communication signal

      Item

      Content

      Terminal No. (Symbol)

      A61-6 (CANL) - B76-109 (E1)

      Tool Setting

      1 V/DIV., 10 μsec./DIV.

      Condition

      Engine stopped and ignition switch ON
      Tip:

      The waveform varies depending on the CAN communication signal.