ECD SYSTEM (for DPF) TERMINALS OF ECM

A01E31UE07

Tech Tips

Each ECM terminal's standard 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
E31-23 (BATT) - E25-1 (E1) L - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
E30-24 (IGSW) - E25-1 (E1) B-O - BR Ignition switch Ignition switch ON 11 to 14 V
E31-24 (+B) - E25-1 (E1) B - BR Power source of ECM Ignition switch ON 11 to 14 V
E31-17 (+B2) - E25-1 (E1) BR - BR Power source of ECM Ignition switch ON 11 to 14 V
E30-11 (MREL) - E25-1 (E1) W-G - BR EFI relay Ignition switch ON 11 to 14 V
E30-11 (MREL) - E25-1 (E1) W-G - BR EFI relay 10 seconds elapsed after ignition switch off 0 to 1.5 V
E30-6 (VCPA) - E30-5 (EPA) LG-R - BR-W Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
E30-4 (VCP2) - E30-3 (EPA2) BR-R - BR-Y Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
E31-2 (VPA) - E30-5 (EPA) W-L - BR-W Accelerator pedal position sensor (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
E31-2 (VPA) - E30-5 (EPA) W-L - BR-W Accelerator pedal position sensor (for engine control) Ignition switch ON, accelerator pedal fully depressed 3.0 to 4.6 V
E31-1 (VPA2) - E30-3 (EPA2) GR-G - BR-Y Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 0.9 to 2.3 V
E31-1 (VPA2) - E30-3 (EPA2) GR-G - BR-Y Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully depressed 3.4 to 5.0 V
E27-13 (VC) - E27-14 (E2) R-W - BR Power source for sensor (specific voltage) Engine switch on (IG) 4.5 to 5.0 V
E26-17 (VG) - E26-18 (EVG) W-R - B-W Mass air flow meter Idling Pulse generation
E26-6 (THA) - E27-14 (E2) Y-B - BR Intake air temperature sensor (built into mass air flow meter) Idling, intake air temperature at 20°C (68°F) 0.5 to 3.4 V
E26-3 (THIA) - E27-14 (E2) Y-G - BR Intake air temperature sensor Idling, intake air temperature at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
E26-5 (THW) - E27-14 (E2) R-L - BR Engine coolant temperature sensor Idling, engine coolant temperature at 80°C (176°F) 0.2 to 1.0 V
E26-4 (THF) - E27-14 (E2) G-B - BR Fuel temperature sensor Ignition switch ON 0.5 to 3.4 V
E31-6 (STA) - E25-1 (E1)

L-Y - BR*1

B-Y - BR*2

 Starter signal Cranking 6.0 V or higher

E26-21 (#1) - E25-1 (E1)

E26-22 (#2) - E25-1 (E1)

E26-23 (#3) - E25-1 (E1)

E26-24 (#4) - E25-1 (E1)

B-W - BR

R - BR

V - BR

Y-R - BR

 Injector assembly Idling

Pulse generation

(See waveform 2)
E24-13 (G+) - E24-14 (G-) Y - L Camshaft position sensor Idling

Pulse generation

(See waveform 5)
E24-7 (NE+) - E24-8 (NE-) Y - L Crankshaft position sensor Idling

Pulse generation

(See waveform 5)
E31-8 (STP) - E25-1 (E1) G-W - BR Stop light switch assembly Ignition switch ON, brake pedal depressed 7.5 to 14 V
E31-8 (STP) - E25-1 (E1) G-W - BR Stop light switch assembly Ignition switch ON, brake pedal released 0 to 1.5 V
E31-9 (ST1-) - E25-1 (E1) R-L - BR

Stop light switch assembly

(opposite to STP)

 Ignition switch ON, brake pedal depressed 0 to 1.5 V
E31-9 (ST1-) - E25-1 (E1) R-L - BR

Stop light switch assembly

(opposite to STP)

 Ignition switch ON, brake pedal released 7.5 to 14 V
E27-15 (CLSW)*1 - E25-1 (E1) G-W - BR Clutch switch assembly Ignition switch ON, clutch pedal released 8.5 to 14 V
E30-23 (TC) - E25-1 (E1) P-B - BR Terminal TC of DLC3 Ignition switch ON 11 to 14 V
E31-19 (W) - E25-1 (E1) R-B - BR MIL MIL illuminated 0 to 3 V
E31-19 (W) - E25-1 (E1) R-B - BR MIL MIL not illuminated 11 to 14 V
E30-30 (SPD) - E25-1 (E1) V-R - BR Speed signal from combination meter assembly Ignition switch ON, slowly wheel rotated

Pulse generation

(See waveform 9)
E27-5 (PIM) - E27-14 (E2) L-B - BR Manifold absolute pressure sensor Negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) applied 0.1 to 0.7 V
E27-5 (PIM) - E27-14 (E2) L-B - BR Manifold absolute pressure sensor Same as atmospheric pressure 0.8 to 1.5 V
E27-5 (PIM) - E27-14 (E2) L-B - BR Manifold absolute pressure sensor Positive pressure of 170 kPa (1275 mmHg, 50.2 in.Hg) applied 1.6 to 2.3 V
E30-12 (IREL) - E25-1 (E1) B-W - BR EDU relay Ignition switch ON 0 to 1.5 V
E31-18 (TACH) - E25-1 (E1) B-W - BR Engine speed Idling Pulse generation
E26-13 (VCS) - E26-8 (E2S) L-W - P-L Power source of fuel pressure sensor (for PCR2) Ignition switch ON 4.5 to 5.5 V
E26-16 (PCR1) - E27-14 (E2) R-Y - BR Fuel pressure sensor (main) Idling 1.8 to 2.1 V
E26-2 (PCR2) - E26-8 (E2S) G-R - P-L Fuel pressure sensor (sub) Idling 1.2 to 1.5 V
E27-23 (ALT) - E25-1 (E1) G - BR Generator assembly (Alternator) duty ratio Idling Pulse generation
E27-7 (PEX) - E27-14 (E2) L - BR Differential pressure sensor Ignition switch ON 0.4 to 4.8 V
E24-6 (HAF2) - E25-11 (E05) Y - W-B Air fuel ratio sensor heater Ignition switch ON 11 to 14 V
E24-2 (AF2+) - E25-11 (E05) B - W-B Air fuel ratio sensor Ignition switch ON 2.0 to 2.5 V
E24-1 (AF2-) - E25-11 (E05) W - W-B Air fuel ratio sensor Ignition switch ON 2.0 to 2.5 V
E25-5 (FIV) - E25-1 (E1) W - BR Exhaust fuel addition injector Exhaust fuel addition injector operating Pulse generation
E24-23 (PCV+) - E24-12 (PCV-) G-W - G-Y Suction control valve Idling

Pulse generation

(See waveform 1)
E26-20 (INJF) - E25-1 (E1) P - BR Injector driver Idling

Pulse generation

(See waveform 3)
E26-19 (PRD) - E25-1 (E1) GR - BR Pressure discharge valve drive signal Engine warmed up, engine racing

Pulse generation

(See waveform 4)
E24-4 (RLFF) - E25-1 (E1) GR - BR Pressure discharge valve confirmation signal Engine warmed up, engine racing

Pulse generation

(See waveform 4)
E24-19 (IDLO) - E25-1 (E1) G - BR EDU Idling 4 to 5.5 V
E25-15 (M+) - E25-1 (E1) W - BR DC motor (turbocharger sub-assembly) Idling

Pulse generation

(See waveform 6)
E25-14 (M-) - E25-1 (E1) B - BR DC motor (turbocharger sub-assembly) Idling

Pulse generation

(See waveform 7)
E27-11 (VNVC) - E27-10 (VNE2) W - L Power source of nozzle vane position sensor Ignition switch ON 4.5 to 5.5 V
E27-6 (VNA) - E27-10 (VNE2) R - L Nozzle vane position sensor Ignition switch ON 2.3 to 2.7 V
E27-3 (VLU) - E27-14 (E2) B- BR Throttle position sensor

Ignition switch ON, throttle valve

fully opened

 3.6 to 4.2 V
E27-3 (VLU) - E27-14 (E2) B- BR Throttle position sensor

Ignition switch ON, throttle valve

fully closed

 0.4 to 1.0 V
E24-15 (LUSL) - E25-1 (E1) GR - BR Diesel throttle duty signal Engine warmed up, racing engine

Pulse generation

(See waveform 8)
E26-1 (EGRA) - E27-14 (E2) R-Y - BR EGR valve position sensor Ignition switch ON 0.6 to 1.4 V
E25-6 (EGM+) - E25-8 (ME01) L - W-B EGR valve duty signal Engine warmed up, idling Pulse generation
E25-7 (EGM-) - E25-8 (ME01) Y - W-B EGR valve duty signal Engine warmed up, idling Pulse generation
E25-4 (ECBV) - E25-1 (E1) B-L - BR Vacuum switching valve (for EGR bypass valve) Vacuum switching valve assembly (for EGR bypass valve) on 0 to 1.5 V
Vacuum switching valve assembly (for EGR bypass valve) off 11 to 14 V
E24-17 (THCF) - E27-14 (E2) R - BR Exhaust gas temperature sensor Engine warmed up, idling 4.6 to 4.9 V
E24-5 (THCI) - E27-14 (E2) G-B - BR No. 2 Exhaust gas temperature sensor Engine warmed up, idling 4.6 to 4.9 V
E27-1 (THCO) - E27-14 (E2) B-Y - BR No. 3 Exhaust gas temperature sensor Engine warmed up, idling 4.6 to 4.9 V
E25-2 (SCV) - E25-12 (E01) LG - W-B Vacuum switching valve (for swirl control valve) Idling 0 to 1.5 V
Engine speed 2600 rpm or more 11 to 14 V
E30-10 (AC1) - E25-12 (E01) Y - W-B A/C signal A/C switch on 0 to 1.5 V
A/C switch off 11 to 14 V
E30-13 (ACT) - E25-12 (E01) R-L - W-B A/C signal Ignition switch ON 11 to 14 V
A/C cut control on 0 to 3 V
E24-26 (NSW)*2 - E25-12 (E01) L-Y - W-B Park/neutral position switch assembly Ignition switch ON, shift lever in P or N Below 3 V
Ignition switch ON, shift lever not in P and N 11 to 14 V
E27-15 (D)*2 - E25-12 (E01) G-Y - W-B Park/neutral position switch assembly Ignition switch ON, shift lever in D 11 to 14 V
Ignition switch ON, shift lever not in D Below 1 V
E30-36 (CANL) - E25-1 (E1) W - BR CAN communication line Ignition switch ON

Pulse generation

(See waveform 10)
E30-35 (CANH) - E25-1 (E1) B - BR CAN communication line Ignition switch ON

Pulse generation

(See waveform 11)
E24-18 (CAN-)*2 - E25-1 (E1) P - BR CAN communication line Ignition switch ON

Pulse generation

(See waveform 10)
E24-24 (CAN+)*2 - E25-1 (E1) V - BR CAN communication line Ignition switch ON

Pulse generation

(See waveform 11)

Tech Tips


  • *1: for Manual Transaxle

  • *2: for Automatic Transaxle


  1. WAVEFORM 1

    A01DV3HE01
    Suction Control Valve Signal
    Item Content
    Terminal No. (Symbol) E24-23 (PCV+) - E24-12 (PCV-)
    Tool Setting 10 V/DIV., 5 msec./DIV.
    Condition Idling or cranking with warm engine

    Tech Tips

    The waveform varies depending on suction control valve operation.

  2. WAVEFORM 2

    A01DZQ2E01
    Injector No. 1 (to No. 4) Injection Signal
    Item Content
    Terminal No. (Symbol)

    (a) E26-21 (#1) - E25-1 (E1)

    (b) E26-22 (#2) - E25-1 (E1)

    (c) E26-23 (#3) - E25-1 (E1)

    (d) E26-24 (#4) - E25-1 (E1)
    Tool Setting 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the injector injection.

  3. WAVEFORM 3

    A01DYNUE01
    Injector Injection Confirmation Signal
    Item Content
    Terminal No. (Symbol) E26-20 (INJF) - E25-1 (E1)
    Tool Setting 2 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the injector injection.

  4. WAVEFORM 4

    A01DWCKE01
    Pressure Discharge Valve Drive Signal and Pressure Discharge Confirmation Signal
    Item Content
    Terminal No. (Symbol)

    (a) E26-19 (PRD) - E25-1 (E1)

    (b) E24-4 (RLFF) - E25-1 (E1)
    Tool Setting 2 V/DIV., 1 msec./DIV.
    Condition Engine warmed up, engine racing

    Tech Tips

    The waveform becomes shorter as the engine speed.

  5. WAVEFORM 5

    A01E27AE08
    Crankshaft Position Sensor Signal and Camshaft Position Sensor Signal
    Item Content
    Terminal No. (Symbol)

    (a) E24-7 (NE+) - E24-8 (NE-)

    (b) E24-13 (G+) - E24-14 (G-)
    Tool Setting 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the engine speed.

  6. WAVEFORM 6

    A01E07VE03
    DC Motor Positive Terminal
    Item Content
    Terminal No. (Symbol) E25-15 (M+) - E25-1 (E1)
    Tool Setting 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on turbocharger operation.

  7. WAVEFORM 7

    A01DUZEE04
    DC Motor Negative Terminal
    Item Content
    Terminal No. (Symbol) E25-14 (M-) - E25-1 (E1)
    Tool Setting 5 V/DIV., 50 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the turbocharger status.

  8. WAVEFORM 8

    A01E1YOE03
    Diesel Throttle Signal
    Item Content
    Terminal No. (Symbol) E24-15 (LUSL) - E25-1 (E1)
    Tool Setting 1 V/DIV., 2 msec./DIV.
    Condition Racing with warm engine

    Tech Tips

    The waveform varies depending on throttle valve operation.

  9. WAVEFORM 9

    A01E2FZE05
    Vehicle Speed Signal
    Item Content
    Terminal No. (Symbol) E30-30 (SPD) - E25-1 (E1)
    Tool Setting 5 V/DIV., 10 msec./DIV.
    Condition Driving at vehicle speed of 40 km/h (25 mph)

    Tech Tips

    The wavelength becomes shorter as the vehicle speed increases.

  10. WAVEFORM 10

    A01E32WE03
    CAN Communication Signal
    Item Content
    Terminal No. (Symbol)

    E30-36 (CANL) - E25-1 (E1)

    E24-18 (CAN-) - E25-1 (E1)
    Tool Setting 1 V/DIV., 10 msec./DIV.
    Condition Engine stopped, ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  11. WAVEFORM 11

    A01DZEKE03
    CAN Communication Signal
    Item Content
    Terminal No. (Symbol)

    E30-35 (CANH) - E25-1 (E1)

    E24-24 (CAN+) - E25-1 (E1)
    Tool Setting 1 V/DIV., 10 msec./DIV.
    Condition Engine stopped, ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.