ECD SYSTEM(for DPF) TERMINALS OF ECM


  1. CHECK ECM

    A00YU8SE38

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

      Tech Tips

      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. A00YU3EE01

      Using an oscilloscope, check waveform 1.

      Tech Tips

      The waveform varies depending on the suction control valve operation.

    3. A00YUYLE01

      Using an oscilloscope, check waveform 2.

      4. Tech Tips

      The waveform varies depending on the injector injection.

    4. A00YSAIE01

      Using an oscilloscope, check waveform 3.

      5. Tech Tips

      The waveform varies depending on the injector injection.

    5. A00YTQOE01

      Using an oscilloscope, check waveform 4.

      6. Tech Tips

      The waveform varies depending on the engine speed.

    6. A00YRJFE01

      Using an oscilloscope, check waveform 5.

      7. Tech Tips

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

    7. A00YWMFE01

      Using an oscilloscope, check waveform 6.

      8. Tech Tips

      The wavelength becomes shorter as the vehicle speed increases.

    8. A00YV40E01

      Using an oscilloscope, check waveform 7.

      9. Tech Tips

      The wavelength becomes shorter as the engine speed increases.

    9. A00YR6HE01

      Using an oscilloscope, check waveform 8.

    10. A00YW0LE01

      Using an oscilloscope, check waveform 9.

      11. Tech Tips

      The waveform varies depending on the CAN communication signal.

    11. A00YTK9E01

      Using an oscilloscope, check waveform 10.

      12. Tech Tips

      The waveform varies depending on the CAN communication signal.