СИСТЕМА ECD КОНТАКТЫ ECM

B007VEVE50

Tech Tips

Each ECM terminal's standard normal voltage is shown in the table below.

In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol)" 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 No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
B74-2 (BATT) - D100-109 (E1) W - W-B Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
B74-6 (SREL) - D100-45 (E01) G - W-B GLOW relay Cranking 11 to 14 V

Idling

(engine start and after 600 second)

 0 to 1.5 V
B74-5 (MREL) - D100-109 (E1) Y - W-B EFI MAIN relay Ignition switch ON 11 to 14 V

Ignition switch off

(after ignition switch off for 2 second)

 0 to 1.5 V
B74-40 (TC) - D100-109 (E1) G - W-B Terminal TC of DLC3 Ignition switch ON 11 to 14 V
D100-48 (RFC) - D100-109 (E1) LG - W-B Cooling fan motor Ignition switch ON or fan is rotating

Pulse generation

(See waveform 1)
B74-41 (SPD) - D100-109 (E1) P - W-B Speed signal from combination meter assembly Ignition switch ON, rotate driving wheel slowly

Pulse generation

(See waveform 2)
B74-33 (STA) - D100-109 (E1) R - W-B Starter signal Cranking 6 V or more
B74-1 (+B) - D100-109 (E1) L - W-B Power source of ECM Ignition switch ON 11 to 14 V
B74-25 (IGSW) - D100-109 (E1) B - W-B Ignition switch Ignition switch ON 11 to 14 V
B74-27 (STP) - D100-109 (E1) Y - W-B Stop light switch assembly Brake pedal depressed 11 to 14 V
Brake pedal released Below 1.5 V
B74-48 (HSW) - D100-109 (E1) L - W-B Idle up switch Idle up switch ON Below 2.5 V
Idle up switch OFF 11 to 14 V
D100-58 (ALT) - D100-109 (E1) W - W-B Generator (alternator) duty ratio Idling

Pulse generation

(See waveform 3)
B74-47 (AC1) - D100-109 (E1) B - W-B Air conditioning amplifier assembly

A/C switch ON

(at magnet clutch ON)

 1.3 to 2.6 V
A/C switch OFF 3.7 to 4.5 V
B74-60 (VPA) - B74-59 (EPA) L - W

Accelerator pedal position sensor

(for engine control)

 Ignition switch ON, accelerator pedal released 0.5 to 1.1 V
Ignition switch ON, accelerator pedal depressed 2.6 to 4.5 V
B74-58 (VCPA) - B74-59 (EPA) W - W

Power source of accelerator pedal position sensor

(for VPA)

 Ignition switch ON 4.5 to 5.5 V
B74-55 (VPA2) - B74-56 (EPA2) B - Y Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal released 1.2 to 2.0 V
Ignition switch ON, accelerator pedal depressed 3.4 to 5.0 V
B74-57 (VCP2) - B74-56 (EPA2) L - Y

Power source of accelerator pedal position sensor

(for VPA2)

 Ignition switch ON 4.5 to 5.5 V
B74-17 (TACH) - D100-109 (E1) B - W-B Engine speed Idling

Pulse generation

(See waveform 4)
B74-15 (ACT) - D100-109 (E1) G - W-B Air conditioning amplifier assembly

A/C switch ON

(at magnet clutch ON)

 11 to 14 V
A/C switch OFF Below 1.0 V
B74-26 (ST1-) - D100-109 (E1) R - W-B Stop light switch assembly Brake pedal depressed Below 1.5 V
Brake pedal released 11 to 14 V
D100-96 (VCPM) - D100-92 (EPIM) L - Y Power source of manifold absolute pressure sensor Ignition switch ON 4.5 to 5.5 V
D100-69 (PIM) - D100-92 (EPIM) P - Y Manifold absolute pressure sensor

Apply vacuum 60 kPa

(450 mmHg, 17.7 in.Hg)

 0.2 to 0.8 V

Apply vacuum 207 kPa

(1,550 mmHg, 61.0 in.Hg)

 4.2 to 4.8 V
D100-71 (THA) - D100-94 (ETHA) L - Y Intake air temperature sensor Idling, air intake temp. 0°C (32°F) to 80°C (176°F) 0.5 to 3.4 V
D100-70 (THW) - D100-93 (ETHW) R-W - Y-R Engine coolant temperature sensor Idling, engine coolant temp. 60°C (140°F) to 120°C (248°F) 0.2 to 1.0 V
D100-72 (THF) - D100-95 (ETHF) R - Y Fuel temperature sensor Ignition switch ON (at engine cold) 0.5 to 3.4 V
D100-118 (DATA) - D100-109 (E1) Y - W-B Injection pump correction unit For 0.5 sec. after ignition switch ON Pulse generation
D100-56 (PR2) - D100-109 (E1) Y - W-B Pressure switch Pressure switch ON (A/C pressure is normal) Below 1.5 V
Pressure switch OFF (A/C pressure is low) 11 to 14 V
D100-68 (RTHW) - D100-91 (EPEX) L - Y Radiator side engine coolant temperature sensor Idling, radiator side engine coolant temp. 60°C (140°F) to 120°C (248°F) 0.2 to 1.0 V
D100-119 (CLK) - D100-109 (E1) L - W-B Injection pump correction unit For 0.5 second after ignition switch ON Pulse generation
D100-57 (THOP) - D100-109 (E1) L - W-B Throttle open switch Idling (engine warmed up) 11 to 14 V
Ignition switch ON (once within 5 second) 0 to 3 V
D100-43 (LU-B) - D100-45 (E01) G - W-B Throttle control motor Racing (engine warmed up)

Pulse generation

(See waveform 5)
D100-84 (LU+B) - D100-45 (E01) R - W-B Throttle control motor Racing (engine warmed up)

Pulse generation

(See waveform 5)
D100-85 (LU-A) - D100-45 (E01) W - W-B Throttle control motor Racing (engine warmed up)

Pulse generation

(See waveform 5)
D100-46 (LU+A) - D100-45 (E01) B - W-B Throttle control motor Racing (engine warmed up)

Pulse generation

(See waveform 5)
D100-42 (TCV) - D100-45 (E01) R - W-B Timing control valve Ignition switch ON 11 to 14 V
Idling Pulse generation
D100-82 (SPV+) - D100-109 (E1) Y - W-B Spill control valve Idling Pulse generation
D100-103 (TDC+) - D100-126 (TDC-) R - G Crankshaft position sensor Idling

Pulse generation

(See waveform 6)
D100-102 (NE+) - D100-125 (NE-) B - W Engine speed sensor Idling

Pulse generation

(See waveform 6)
D100-41 (SPV-) - D100-109 (E1) L - W-B Spill control valve Idling Pulse generation
B74-10 (CANH) - D100-109 (E1) B - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 7)
B74-11 (CANL) - D100-109 (E1) W - W-B CAN communication line Ignition switch ON

Pulse generation

(See waveform 8)

  1. Waveform 1 (Reference):


    1. B007UIUE03

      Cooling fan signal.

      Terminal RFC - E1
      Tool Setting 1 V/DIV., 2 msec./DIV.
      Condition When fan operating

      Tech Tips

      Waveform time A changes according to coolant temperature.

  2. Waveform 2 (Reference):


    1. B007UJ8E06

      Speed signal.

      Terminal SPD - E1
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition When driving at approx. 20 km/h (12.4 mph).

      Tech Tips


      • As vehicle speed increases, the wavelength becomes shorter.

      • As vehicle speed increases, the waveform's amplitude becomes greater.

  3. Waveform 3 (Reference):


    1. B007QOFE02

      Generator signal.

      Terminal ALT - E1
      Tool Setting 5 V/DIV., 5 msec./DIV.
      Condition During idling

  4. Waveform 4 (Reference):


    1. B007U1XE10

      Engine speed signal.

      Terminal TACH - E1
      Tool Setting 5 V/DIV., 20 msec./DIV.
      Condition

      1. After warming up

      2. During idling

      Tech Tips

      As engine speed increases, the wavelength becomes shorter.

  5. Waveform 5 (Reference):


    1. B007TCSE04

      Throttle control motor signal.

      Terminal LU+A, LU-A, LU+B, LU-B - E01
      Tool Setting 10 V/DIV., 0.5 msec./DIV.
      Condition During engine racing

  6. Waveform 6 (Reference):


    1. B007RTPE01

      Crankshaft position sensor signal and Engine speed sensor signal.

      Terminal

      TDC+ - TDC-

      NE+ - NE-
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition During idling

  7. Waveform 7 (Reference):


    1. B007PJVE02

      CAN communication signal

      Terminal CANH - E1
      Tool Setting 1 V/DIV., 10 msec./DIV.
      Condition Engine is stopped, ignition switch ON

      Tech Tips

      The wavelength becomes shorter as the CAN communication signal

  8. Waveform 8 (Reference):


    1. B007VP9E02

      CAN communication signal

      Terminal CANL - E1
      Tool Setting 1 V/DIV., 10 msec./DIV.
      Condition Engine is stopped, ignition switch ON

      Tech Tips

      The waveform varies depending on the CAN communication signal.