ECD SYSTEM(w/o Gear Shift Indicator) TERMINALS OF ECM


  1. CHECK ECM

    A004P12E02

    1. Measure the voltage of the ECM connector.

      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
      A40-2 (BATT) - B39-109 (E1) B - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
      A40-25 (IGSW) - B39-109 (E1) B - BR Ignition switch Ignition switch ON 11 to 14 V
      A40-1 (+B) - B39-109 (E1) B - BR Power source of ECM Ignition switch ON 11 to 14 V
      A40-45 (MREL) - B39-109 (E1) W - BR EFI MAIN relay Ignition switch ON 11 to 14 V
      A40-45 (MREL) - B39-109 (E1) W - BR EFI MAIN relay 2 seconds elapsed after ignition switch off 0 to 1.5 V
      A40-44 (IREL) - B39-109 (E1) R - BR EDU relay ignition switch off 11 to 14 V
      A40-44 (IREL) - B39-109 (E1) R - BR EDU relay Idling 0 to 1.5 V
      B39-58 (GREL) - B39-109 (E1) R - BR Glow plug relay Cranking 11 to 14 V
      B39-58 (GREL) - B39-109 (E1) R - BR Glow plug relay Idling (10 minutes or more after engine start) 0 to 1.5 V
      A40-53 (VPA) - A40-56 (EPA) W - R Accelerator pedal position sensor (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
      A40-53 (VPA) - A40-56 (EPA) W - R Accelerator pedal position sensor (for engine control) Ignition switch ON, accelerator pedal fully depressed 3.0 to 4.6 V
      A40-54 (VPA2) - A40-58 (EPA2) Y - G Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 0.9 to 2.3 V
      A40-54 (VPA2) - A40-58 (EPA2) Y - G Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully depressed 3.4 to 5.0 V
      A40-55 (VCPA) - A40-56 (EPA) L - R Power source of accelerator pedal position sensor (for VPA1) Ignition switch ON 4.5 to 5.5 V
      A40-57 (VCP2) - A40-58 (EPA2) LG - G Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
      A40-43 (STA) - B39-109 (E1) LG - BR Starter signal Cranking 6.0 V or higher
      B39-51 (INJF) - B39-109 (E1) R-B - BR EDU Idling

      Pulse generation

      (See waveform 3)
      B39-50 (#1) - B39-109 (E1) V - BR Injector Idling

      Pulse generation

      (See waveform 2)
      B39-49 (#2) - B39-109 (E1) W-R - BR
      B39-48 (#3) - B39-109 (E1) LG - BR
      B39-47 (#4) - B39-109 (E1) B - BR
      B39-52 (PRD) - B39-109 (E1) R-L - BR Pressure relief valve drive signal Ignition switch off 4 to 5.5 V
      B39-62 (IDLO) - B39-109 (E1) W-G - BR EDU Idling 4 to 5.5 V
      B39-103 (NE+) - B39-102 (NE-) G - R Crankshaft position sensor Idling

      Pulse generation

      (See waveform 4)
      B39-80 (G+) - B39-79 (G-) P - L Camshaft position sensor Idling

      Pulse generation

      (See waveform 4)
      A40-35 (STP) - B39-109 (E1) V - BR Stop light switch Ignition switch ON, brake pedal depressed 7.5 to 14 V
      A40-35 (STP) - B39-109 (E1) V - BR Stop light switch Ignition switch ON, brake pedal released 0 to 1.5 V
      A40-34 (ST1-) - B39-109 (E1) R-W - BR Stop light switch Ignition switch ON, brake pedal depressed 0 to 1.5 V
      A40-34 (ST1-) - B39-109 (E1) R-W - BR Stop light switch Ignition switch ON, brake pedal released 7.5 to 14 V
      A40-26 (TC) - B39-109 (E1) P - BR Terminal TC of DLC3 Ignition switch ON 11 to 14 V
      A40-12 (W) - B39-109 (E1) P - BR MIL MIL illuminated 0 to 3 V
      A40-12 (W) - B39-109 (E1) P - BR MIL MIL not illuminated 11 to 14 V
      A40-14 (SPD) - B39-109 (E1) Y- BR Speed signal from combination meter Ignition switch ON, drive wheels rotating slowly

      Pulse generation

      (See waveform 6)
      B39-117 (PIM) - B39-72 (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
      B39-117 (PIM) - B39-72 (EPIM) G - BR Manifold absolute pressure sensor Atmospheric pressure 0.8 to 1.4 V
      B39-117 (PIM) - B39-72 (EPIM) G - BR Manifold absolute pressure sensor Positive pressure of 69 kPa (518 mmHg, 20.3 in.Hg) applied 1.6 to 2.2 V
      A40-13 (TACH) - B39-109 (E1) GR - BR Engine speed Idling

      Pulse generation

      (See waveform 7)
      B39-68 (VCM) - B39-67 (E2M) W-R - W-G Common rail pressure sensor Ignition switch ON 4.5 to 5.5 V
      B39-69 (VCS) - B39-91 (E2S) G-B - B-R Common rail pressure sensor Ignition switch ON 4.5 to 5.5 V
      B39-66 (PCR1) - B39-67 (E2M) P - W-G Common rail pressure sensor (main) Idling 1.8 to 2.1 V
      B39-114 (PCR2) - B39-91 (E2S) R-B - B-R Common rail pressure sensor (sub) Idling 1.2 to 1.5 V
      B39-54 (ALT) - B39-109 (E1) L - BR Generator duty ratio Idling

      Pulse generation

      (See waveform 8)
      B39-41 (PCV+) - B39-81 (PCV-) R - R-W Suction control valve Idling

      Pulse generation

      (See waveform 1)
      B39-83 (VN) - B39-109 (E1) W - BR VRV (for VN turbocharger) Idling

      Pulse generation

      (See waveform 5)
      B39-105 (FIV) - B39-109 (E1) G - BR Exhaust fuel addition injector Engine warmed up, idling, every 1 to 2 minutes Pulse generation
      B39-97 (VCVL) - B39-96 (EVLU) L-R - B Throttle position sensor Ignition switch ON 4.5 to 5.5 V
      B39-119 (VLU) - B39-96 (EVLU) Y - B Throttle position sensor Ignition switch ON, throttle valve fully opened 2.8 to 3.8 V
      B39-42 (M+) - B39-84 (ME01) L - W-B Throttle valve duty signal Engine warmed up, engine racing Pulse generation
      B39-43 (M-) - B39-84 (ME01) R - W-B Throttle valve duty signal Engine warmed up, engine racing Pulse generation
      B39-94 (VCEG) - B39-95 (EEGL) W - V EGR valve position sensor Ignition switch ON 4.5 to 5.5 V
      B39-118 (EGLS) - B39-95 (EEGL) L - V EGR valve position sensor Ignition switch ON 1.03 to 1.37 V
      B39-86 (EGM+) - B39-84 (ME01) W - W-B EGR valve duty signal Engine warmed up, idling Pulse generation
      B39-85 (EGM-) - B39-84 (ME01) B - W-B EGR valve duty signal Engine warmed up, idling Pulse generation
      B39-121 (THCO) - B39-120 (ETCO) V - BR Exhaust gas temperature sensor Engine warmed up, idling 4.6 to 4.9 V
      B39-122 (THCI) - B39-99 (ETCI) L-R - BR Exhaust gas temperature sensor Engine warmed up, idling 4.6 to 4.9 V
      B39-113 (THIA) - B39-90 (ETHI) GR- L-B Intake air temperature sensor (Intake manifold) Idling, intake air temperature at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
      B39-112 (THF) - B39-89 (ETHF) L - G Fuel temperature sensor Ignition switch ON 0.5 to 3.4 V
      B39-111 (THW) - B39-88 (ETHW) B - BR ECT sensor Idling, engine coolant temperature at 60 to 120°C (140 to 248°F) 0.2 to 1.0 V
      B39-75 (VCPX) - B39-74 (EPEX) V - BR Differential pressure sensor Ignition switch ON 4.5 to 5.5 V
      B39-98 (PEX) - B39-74 (EPEX) P - BR Differential pressure sensor Ignition switch ON 0.4 to 4.8 V
      B39-104 (HAF2) - B39-46 (E05) L - W-B A/F sensor heater Ignition switch ON 11 to 14 V
      B39-125 (AF2+) - B39-46 (E05) BR - W-B A/F sensor Ignition switch ON 2.0 to 2.5 V
      B39-126 (AF2-) - B39-46 (E05) Y - W-B A/F sensor Ignition switch ON 2.0 to 2.5 V
      B39-65 (VG) - B39-64 (EVG) V - R MAF meter power source Ignition switch ON Pulse generation
      B39-110 (THA) - B39-87 (ETHA) P - BR-W IAT sensor Idling, intake air temperature at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
      A40-22 (FANL) - B39-109 (E1) R - BR FAN NO. 3 relay Ignition switch ON 11 to 14 V
      A40-22 (FANL) - B39-109 (E1) R - BR FAN NO. 3 relay

      Idling with A/C on

      or

      High engine coolant temperature

      		 Below 1.5 V
      A40-21 (FANH) - B39-109 (E1) W - BR FAN NO. 1, 2 relay Idling with high engine coolant temperature Below 1.5 V
      A40-7 (CANH) - B39-109 (E1) Y - BR CAN communication line Ignition switch ON

      Pulse generation

      (See waveform 9)
      A40-6 (CANL) - B39-109 (E1) W - BR CAN communication line Ignition switch ON

      Pulse generation

      (See waveform 10)
    2. A004TWNE01
      *a 10 V/DIV.
      *b 5 msec./DIV.

      Using an oscilloscope, check waveform 1.

      Tech Tips

      The waveform varies depending on the suction control valve operation.

    3. A004NJFE01
      4. *a 5 V/DIV.
      *b 20 msec./DIV.

Using an oscilloscope, check waveform 2.

Tech Tips

The waveform varies depending on the injector injection.

  • A004RNIE01
    • *a 2 V/DIV.
    *b 20 msec./DIV.

    Using an oscilloscope, check waveform 3.

    Tech Tips

    The waveform varies depending on the injector injection.

  • A004OQ3E01

    Using an oscilloscope, check waveform 4.

    • Tech Tips

    The waveform varies depending on the engine speed.

  • A004PWJE02
    • *a 5 V/DIV.
    *b 1 msec./DIV.

    Using an oscilloscope, check waveform 5.

    Tech Tips

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

  • A004U6YE02
    • *a 5 V/DIV.
    *b 20 msec./DIV.

    Using an oscilloscope, check waveform 6.

    Tech Tips

    The wavelength becomes shorter as the vehicle speed increases.

  • A004U4CE01
    • *a 5 V/DIV.
    *b 20 msec./DIV.

    Using an oscilloscope, check waveform 7.

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  • A004N1LE01
    • *a 5 V/DIV.
    *b 5 msec./DIV.

    Using an oscilloscope, check waveform 8.

  • A004MQ0E02
    • *a 1 V/DIV.
    *b 10 μsec./DIV.

    Using an oscilloscope, check waveform 9.

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  • A004OJWE02
    • *a 1 V/DIV.
    *b 10 μsec./DIV.

    Using an oscilloscope, check waveform 10.

    Tech Tips

    The waveform varies depending on the CAN communication signal.