ECD SYSTEM TERMINALS OF ECM

A01CIN6E53

Tech Tips

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

In the table, first follow the information under "Condition". Lock under "Terminal No. (Symbols)" 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. (Symbols) Wiring Color Terminal Description Condition Specified Condition
E24-2 (BATT) - E23-7 (E1) L-R - BR Battery (for measuring battery voltage and for ECM memory) Constant 11 to 14 V
E25-16 (IGSW) - E23-7 (E1) GR - BR Ignition switch Ignition switch in the ON position 11 to 14 V
E25-1 (+B) - E23-7 (E1) B-R - BR Power source of ECM Ignition switch in the ON position 11 to 14 V
E25-13 (MREL) - E23-7 (E1) GR-R - BR MAIN relay Ignition switch in the ON position 11 to 14 V
E25-13 (MREL) - E23-7 (E1) GR-R - BR MAIN relay 5 seconds pass after ignition switch off 0 to 2 V
E22-18 (VC) - E23-7 (E1) L-B - BR Power source of sensor (a specific voltage) Ignition switch in the ON position 4.5 to 5.5 V
E25-22 (VPA) - E25-28 (EPA) BR-R - LG-B Accelerator pedal position sensor (for engine control) Ignition switch in the ON position, accelerator pedal fully released 0.6 to 1.0 V
E25-22 (VPA) - E25-28 (EPA) BR-R - LG-B Accelerator pedal position sensor (for engine control) Ignition switch in the ON position, accelerator pedal fully depressed 2.8 to 3.6 V
E25-23 (VPA2) - E25-29 (EPA2) R-W - GR-G Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch in the ON position, accelerator pedal fully released 1.4 to 1.8 V
E25-23 (VPA2) - E25-29 (EPA2) R-W - GR-G Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch in the ON position, accelerator pedal fully depressed 3.6 to 4.4 V
E25-20 (VCPA) - E25-28 (EPA) B-O - LG-B Power source of accelerator pedal position sensor (for VPA) Ignition switch in the ON position 4.5 to 5.5 V
E25-21 (VCP2) - E25-29 (EPA2) G-W - GR-G Power source of accelerator pedal position sensor (for VPA2) Ignition switch in the ON position 4.5 to 5.5 V
E23-24 (VG) - E23-32 (EVG) G - V-R Mass air flow meter Engine is warmed up: Idling 1.5 to 1.9 V
E22-31 (THA) - E22-28 (E2) V-G - R-B Intake air temperature sensor (built in mass air flow meter) Engine is warmed up: Idling, IAT at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
E22-20 (THIA) - E22-28 (E2) Y-R - R-B Intake air temperature sensor (after turbocharged) Engine is warmed up: Idling, IAT at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
E22-19 (THW) - E22-28 (E2) G-R - R-B Engine coolant temperature sensor Idling, ECT at 80 to 120°C (176 to 248°F) 0.4 to 1.0 V

E22-24 (#1) - E23-7 (E1)

E22-23 (#2) - E23-7 (E1)

E22-22 (#3) - E23-7 (E1)

E22-21 (#4) - E23-7 (E1)

P-L - BR

LG - BR

LG-B - BR

GR - BR

 Injector Engine is warmed up: Idling

Pulse generation

(See waveform 1)
E23-23 (G+) - E23-31 (G-) R - G Camshaft position sensor Engine is warmed up: Idling

Pulse generation

(See waveform 2)
E22-27 (NE+) - E22-34 (NE-) B - W Crankshaft position sensor Engine is warmed up: Idling

Pulse generation

(See waveform 2)
E25-18 (STP) - E23-7 (E1) V - BR Stop light switch Ignition switch in the ON position, brake pedal depressed 18 to 27 V
E25-18 (STP) - E23-7 (E1) V - BR Stop light switch Ignition switch in the ON position, brake pedal released 0 to 2 V
E25-8 (ST1-) - E23-7 (E1) V-Y - BR Stop light switch (opposite to STP) Brake pedal depressed 0 to 2 V
E25-8 (ST1-) - E23-7 (E1) V-Y - BR Stop light switch (opposite to STP) Brake pedal released 11 to 14 V
E25-17 (TC) - E23-7 (E1) R-B - BR Terminal TC of DLC3 Ignition switch in the ON position 6 V or more
E23-18 (STA) - E23-7 (E1) B-W - BR Starter signal Cranking 18 to 27 V
E25-6 (TAC) - E23-7 (E1) P - BR Engine speed Idling

Pulse generation

(See waveform 3)
E25-9 (W) - E23-7 (E1) Y-R - BR MIL MIL illuminated 0 to 2 V
E25-9 (W) - E23-7 (E1) Y-R - BR MIL MIL not illuminated 18 to 27 V
E25-19 (SPD) - E23-7 (E1) R - BR Speed signal from combination meter Ignition switch in the ON position, driving wheel slowly rotated

Pulse generation

(See waveform 4)
E23-28 (PIM) - E22-28 (E2) P-G - R-B Turbo pressure sensor (manifold absolute pressure sensor) Applied negative pressure of 93 kPa (697 mmHg, 27.5 in.Hg) 0.25 to 0.4 V
E23-28 (PIM) - E22-28 (E2) P-G - R-B Turbo pressure sensor (manifold absolute pressure sensor) Applied positive pressure of 150 kPa (1128 mmHg, 44.2 in.Hg) 1.0 to 1.4 V
E25-14 (IREL) - E23-7 (E1) R - BR EDU relay Ignition switch off 11 to 14 V
E25-14 (IREL) - E23-7 (E1) R - BR EDU relay Idling 0 to 2 V
E22-26 (PCR1) - E22-28 (E2) L-W - R-B Fuel pressure sensor

Idling (Approximately 30 MPa (306 kgf/cm2, 4351 psi))

 1.3 to 1.7 V
E22-29 (THF) - E22-28 (E2) Y - R-B Fuel temperature sensor Ignition switch in the ON position 1.2 to 1.6 V
E23-22 (VCG) - E23-31 (G-) L-R - G Camshaft position sensor Ignition switch in the ON position 4.5 to 5.5 V
E22-2 (PCV+) - E22-1 (PCV-) L - L-Y Suction control valve Idling

Pulse generation

(See waveform 5)
E23-33 (EGLS) - E22-28 (E2) G-Y - R-B EGR position sensor Ignition switch in the ON position 3.8 to 4.2 V
E23-33 (EGLS) - E22-28 (E2) G-Y - R-B EGR position sensor Engine is warmed up, Idling 3.0 to 3.5 V
E23-3 (EGRS) - E23-7 (E1) G - BR EGR valve Ignition switch in the ON position 0 to 2 V
E23-3 (EGRS) - E23-7 (E1) G - BR EGR valve Engine is warmed up, Engine speed 1500 rpm

Pulse generation

(See waveform 6)
E22-25 (INJF) - E23-7 (E1) B - BR EDU Idling

Pulse generation

(See waveform 7)
E23-20 (VLU) - E22-28 (E2) Y-B - R-B Throttle position sensor Accelerator pedal depressed 2.6 to 3.0 V
E23-20 (VLU) - E22-28 (E2) Y-B - R-B Throttle position sensor Accelerator pedal released 1.4 to 1.8 V
E23-4 (LUSL) - E23-7 (E1) W - BR Throttle control motor duty signal Accelerator pedal released → Accelerator pedal depressed (when throttle motor is operating)

Pulse generation

(See waveform 8)
E23-1 (THCO) - E22-28 (E2) W-L - R-B Exhaust gas temperature sensor Engine is warmed up, Idling 4.5 to 4.9 V
E23-2 (THCI) - E22-28 (E2) W-R - R-B Exhaust gas temperature sensor Engine is warmed up, Idling 4.5 to 4.9 V
E23-27 (PEX) - E22-28 (E2) P-L - R-B Differential pressure sensor Engine is warmed up, Idling 0.5 to 1.0 V
E24-15 (RGSW) - E23-7 (E1) P-L - BR DPF switch signal DPF switch on 18 to 27 V
E24-15 (RGSW) - E23-7 (E1) P-L - BR DPF switch signal DPF switch off 0 to 2 V
E23-8 (EXB) - E23-7 (E1) P-L - BR Exhaust brake Exhaust brake operating 11 to 14 V
E25-10 (W2) - E23-7 (E1) B-W - BR DPF indicator DPF indicator on (ignition switch in the ON position) 0 to 2 V
E25-10 (W2) - E23-7 (E1) B-W - BR DPF indicator DPF indicator off (idling) 18 to 27 V
E23-16 (PMB) - E23-7 (E1) B-W - BR DPF warning buzzer Buzzer off 18 to 27 V
E23-16 (PMB) - E23-7 (E1) B-W - BR DPF warning buzzer Buzzer on 0 to 2 V
E24-16 (NUSW) - E23-7 (E1) B-O - BR Neutral position switch Ignition switch in the ON position, shift position is neutral 11 to 14 V
E24-16 (NUSW) - E23-7 (E1) B-O - BR Neutral position switch Ignition switch in the ON position, shift position is not neutral 0 to 2 V
E24-9 (CLSW) - E23-7 (E1) O - BR Exhaust brake clutch switch Clutch pedal depressed 0 to 2 V
E24-9 (CLSW) - E23-7 (E1) O - BR Exhaust brake clutch switch Clutch pedal released 18 to 27 V
E24-13 (EXSW) - E23-7 (E1) L-W - BR Combination switch Exhaust brake switch on 18 to 27 V
E24-13 (EXSW) - E23-7 (E1) L-W - BR Combination switch Exhaust brake switch off 0 to 2 V
E24-11 (HSW) - E23-7 (E1) BR-W - BR Warm up switch Warm up switch on 18 to 27 V
E24-11 (HSW) - E23-7 (E1) BR-W - BR Warm up switch Warm up switch off 0 to 2 V
E24-17 (CANH) - E23-7 (E1) W - BR CAN communication line Ignition switch in the ON position

Pulse generation

(See waveform 9)
E24-28 (CANL) - E23-7 (E1) B - BR CAN communication line Ignition switch in the ON position

Pulse generation

(See waveform 10)
E23-7 (E1) - Body ground BR - - Ground Always Below 1 Ω
E22-28 (E2) - Body ground R-B - - Ground Always Below 1 Ω
E22-7 (E01) - Body ground BR - - Ground Always Below 1 Ω
E22-6 (E02) - Body ground BR - - Ground Always Below 1 Ω
E23-19 (EC) - Body ground W-B - - Ground Always Below 1 Ω

  1. Waveform 1


    1. A01CH8JE11

      Injector No. 1 injection signal (A)

    2. Injector No. 2 injection signal (B)

    3. Injector No. 3 injection signal (C)

    4. Injector No. 4 injection signal (D)

      Terminal No. (Symbols)

      (A) E22-24 (#1) - E22-7 (E1)

      (B) E22-22 (#3) - E22-7 (E1)

      (C) E22-21 (#4) - E22-7 (E1)

      (D) E22-23 (#2) - E22-7 (E1)
      Tool Setting 5 V/DIV., 20 msec./DIV.
      Condition Idling with warm engine

      Tech Tips

      The waveform varies depending on the injector injection.

  2. Waveform 2


    1. A01CHUCE01

      Crankshaft position sensor signal (A)

    2. Camshaft position sensor signal (B)

      Terminal No. (Symbols)

      (A) E22-27 (NE+) - E22-34 (NE-)

      (B) E23-23 (G+) - E23-31 (G-)
      Tool Setting 5 V/DIV., 20 msec./DIV.
      Condition Idling with warm engine

      Tech Tips

      The waveform varies depending on the engine revolution.

  3. Waveform 3


    1. A01CJ1LE01

      Engine speed signal

      Terminal No. (Symbols) E25-3 (TAC) - E23-7 (E1)
      Tool Setting 5 V/DIV., 20 msec./DIV.
      Condition Idling with warm engine

      Tech Tips

      The wavelength becomes shorter as the engine speed increases.

  4. Waveform 4


    1. A01CIZ6E03

      Vehicle speed signal

      Terminal No. (Symbols) E25-19 (SPD) - E23-7 (E1)
      Tool Setting 5 V/DIV., 20 msec./DIV.
      Condition Driving the vehicle

      Tech Tips

      The wavelength becomes shorter as the vehicle speed increases.

  5. Waveform 5


    1. A01CIO6E08

      Suction control valve signal

      Terminal No. (Symbols) E22-2 (PCV+) - E22-1 (PCV-)
      Tool Setting 10 V/DIV., 5 msec./DIV.
      Condition Idling or cranking with warm engine

      Tech Tips

      The waveform varies depending on the suction control valve operation.

  6. Waveform 6


    1. A01CHVQE01

      EGR position sensor signal

      Terminal No. (Symbols) E23-3 (EGRS) - E23-7 (E1)
      Tool Setting 5 V/DIV., 5 msec./DIV.
      Condition Idling

  7. Waveform 7


    1. A01CJ5YE11

      Injector injection confirmation signal

      Terminal No. (Symbols) E22-25 (INJF) - E23-7 (E1)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Idling with warm engine

      Tech Tips

      The waveform varies depending on the injector injection.

  8. Waveform 8


    1. A01CJHOE08

      Diesel throttle signal

      Terminal No. (Symbols) E23-4 (LUSL) - E23-7 (E1)
      Tool Setting 1 V/DIV., 2 msec./DIV.
      Condition Warm engine with engine racing

      Tech Tips

      The waveform varies depending on the throttle valve operation.

  9. Waveform 9


    1. A01CGRPE12

      CAN communication signal

      Terminal No. (Symbols) E24-17 (CANH) - E23-7 (E1)
      Tester Range 1 V/DIV., 10 μsec./DIV.
      Condition Engine stop and ignition switch in the ON position

      Tech Tips

      The waveform varies depending on the CAN communication signal.

  10. Waveform 10


    1. A01CH9IE13

      CAN communication signal

      Terminal No. (Symbols) E24-28 (CANL) - E23-7 (E1)
      Tester Range 1 V/DIV., 10 μsec./DIV.
      Condition Engine stops and ignition switch is in the ON position

      Tech Tips

      The waveform varies depending on the CAN communication signal.