ECD SYSTEM(w/o DPF) TERMINALS OF ECM

B001WNEE01

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

Tech Tips

The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated.

The result of the checks should be compared with the standard normal voltage for that pair of terminals, which is displayed in the Specified Condition column.

The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition

A38*1-20 (BATT) - C45*1-81 (E1)

A52*2-20 (BATT) - C46*2-81 (E1)

 L - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V

A38*1-28 (IGSW) - C45*1-81 (E1)

A52*2-28 (IGSW) - C46*2-81 (E1)

 B - BR Ignition switch Ignition switch ON 11 to 14 V

A38*1-2 (+B) - C45*1-81 (E1)

A52*2-2 (+B) - C46*2-81 (E1)

 B - BR Power source of ECM Ignition switch ON 11 to 14 V

A38*1-44 (MREL) - C45*1-81 (E1)

A52*2-44 (MREL) - C46*2-81 (E1)

 W - BR EFI relay Ignition switch ON 11 to 14 V
10 seconds elapsed after ignition switch turned off 0 to 1.5 V

C45*1-66 (VCPM) - C45*1-75 (E2)

C46*2-66 (VCPM) - C46*2-75 (E2)

 L-B - BR Power source of manifold absolute pressure sensor (for PIM) Ignition switch ON 4.5 to 5.5 V

C45*1-70 (VCM) - C45*1-75 (E2)

C46*2-70 (VCM) - C46*2-75 (E2)

 L-R - BR Power source of fuel pressure sensor (for PCR1) Ignition switch ON 4.5 to 5.5 V

C45*1-90 (VCEG) - C45*1-87 (EEGL)

C46*2-90 (VCEG) - C46*2-87 (EEGL)

 L-R - BR Power source of EGR valve position sensor Ignition switch ON 4.5 to 5.5 V

C45*1-91 (VCVL) - C45*1-92 (EVLU)

C46*2-91 (VCVL) - C46*2-92 (EVLU)

 L-R - BR Power source of throttle position sensor Ignition switch ON 4.5 to 5.5 V

C45*1-72 (VG) - C45*1-118 (EVG)

C46*2-72 (VG) - C46*2-118 (EVG)

 L-Y - G-W Mass air flow meter Engine warmed up and idling, A/C switch off 0.5 to 3.4 V

C45*1-71 (THA) - C45*1-75 (E2)

C46*2-71 (THA) - C46*2-75 (E2)

 Y - BR Intake air temperature sensor (built into mass air flow meter) Engine warmed up and idling, intake air temperature at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V

A38*1-53 (VPA) - A38*1-57 (EPA)

A52*2-53 (VPA) - A52*2-57 (EPA)

 R - W Accelerator pedal position sensor (for engine control) Ignition switch ON, accelerator pedal fully released 0.6 to 1.0 V
Ignition switch ON, accelerator pedal fully depressed 3.0 to 4.6 V

A38*1-54 (VPA2) - A38*1-58 (EPA2)

A52*2-54 (VPA2) - A52*2-58 (EPA2)

 GR - BE Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 1.4 to 1.8 V
Ignition switch ON, accelerator pedal fully depressed 3.7 to 5.0 V

A38*1-55 (VCPA) - A38*1-57 (EPA)

A52*2-55 (VCPA) - A52*2-57 (EPA)

 L - W Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V

A38*1-56 (VCP2) - A38*1-58 (EPA2)

A52*2-56 (VCP2) - A52*2-58 (EPA2)

 V - BE Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V

C45*1-74 (THIA) - C45*1-75 (E2)

C46*2-74 (THIA) - C46*2-75 (E2)

 W-G - BR Intake air temperature sensor (after turbocharged) Engine warmed up and idling, intake air temperature sensor (after turbocharged) at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V

C45*1-76 (THW) - C45*1-75 (E2)

C46*2-76 (THW) - C46*2-75 (E2)

 G-B - BR Engine coolant temperature sensor Engine warmed up and idling, engine coolant temperature at 60 to 120°C (140 to 248°F) 0.2 to 1.2 V
C45*1-40 (#1) - C45*1-81 (E1) Y - BR Fuel injector Idling

Pulse generation

(see waveform 1)
C46*2-40 (#1) - C46*2-81 (E1)
C45*1-39 (#2) - C45*1-81 (E1) B - BR
C46*2-39 (#2) - C46*2-81 (E1)
C45*1-38 (#3) - C45*1-81 (E1) L - BR
C46*2-38 (#3) - C46*2-81 (E1)
C45*1-37 (#4) - C45*1-81 (E1) R - BR
C46*2-37 (#4) - C46*2-81 (E1)
C45*1-36 (#5) - C45*1-81 (E1) G - BR
C46*2-36 (#5) - C46*2-81 (E1)
C45*1-35 (#6) - C45*1-81 (E1) V - BR
C46*2-35 (#6) - C46*2-81 (E1)
C45*1-34 (#7) - C45*1-81 (E1) W - BR
C46*2-34 (#7) - C46*2-81 (E1)
C45*1-33 (#8) - C45*1-81 (E1) P - BR
C46*2-33 (#8) - C46*2-81 (E1)

C45*1-80 (G+) - C45*1-79 (G-)

C46*2-80 (G+) - C46*2-79 (G-)

 W - B Camshaft position sensor Idling

Pulse generation

(see waveform)

C45*1-78 (NE+) - C45*1-77 (NE-)

C46*2-78 (NE+) - C46*2-77 (NE-)

 B - W Crankshaft position sensor Idling

Pulse generation

(see waveform)

C45*1-114 (PIM) - C45*1-75 (E2)

C46*2-114 (PIM) - C46*2-75 (E2)

 P-L - BR Manifold absolute pressure sensor Negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) applied 0.1 to 0.7 V
Same as atmospheric pressure 0.8 to 1.4 V
Positive pressure of 170 kPa (1275 mmHg, 50.2 in.Hg) applied 1.6 to 2.2 V

A38*1-45 (IREL) - C45*1-81 (E1)

A52*2-45 (IREL) - C46*2-81 (E1)

 LG - BR EDU relay (EDU 1) Ignition switch off 11 to 14 V
Idling 0 to 1.5 V

A38*1-46 (IRL2) - C45*1-81 (E1)

A52*2-46 (IRL2) - C46*2-81 (E1)

 V - BR EDU relay (EDU 2) Ignition switch off 11 to 14 V
Idling 0 to 1.5 V

C45*1-69 (PCR1) - C45*1-75 (E2)

C46*2-69 (PCR1) - C46*2-75 (E2)

 B - BR Fuel pressure sensor

Idling (Approximately 35 MPa (357 kgf/cm2, 5078 psi))

 1.3 to 1.8 V

C45*1-63 (GREL) - C45*1-81 (E1)

C46*2-63 (GREL) - C46*2-81 (E1)

 R-B - BR No. 1 glow relay Cranking 11 to 14 V
Idling 0 to 1.5 V

C45*1-62 (GRL2) - C45*1-81 (E1)

C46*2-62 (GRL2) - C46*2-81 (E1)

 R - BR No. 2 glow relay Cranking 11 to 14 V
Idling 0 to 1.5 V

C45*1-116 (THF) - C45*1-75 (E2)

C46*2-116 (THF) - C46*2-75 (E2)

 G-R - BR Fuel temperature sensor Ignition switch ON 0.5 to 3.4 V

C45*1-106 (PCV+) - C45*1-105 (PCV-)

C46*2-106 (PCV+) - C46*2-105 (PCV-)

 W - BR Suction control valve Idling

Pulse generation

(see waveform 2)

C45*1-61 (INJF) - C45*1-81 (E1)

C46*2-61 (INJF) - C46*2-81 (E1)

 G - BR No. 1 injector driver Idling

Pulse generation

(see waveform 3)

C45*1-60 (INF2) - C45*1-81 (E1)

C46*2-60 (INF2) - C46*2-81 (E1)

 W - BR No. 2 injector driver Idling

Pulse generation

(see waveform 3)

C45*1-93 (VLU) - C45*1-75 (E2)

C46*2-93 (VLU) - C46*2-75 (E2)

 L-W - BR Throttle position sensor (for Bank 1)

Ignition switch ON

(throttle valve fully opened)

 2.8 to 3.8 V

Idling

(throttle valve fully closed)

 0.4 to 1.0 V

C45*1-103 (VLU2) - C45*1-75 (E2)

C46*2-103 (VLU2) - C46*2-75 (E2)

 L-W - BR Throttle position sensor (for Bank 2)

Ignition switch ON

(throttle valve fully opened)

 2.8 to 3.8 V

Idling

(throttle valve fully closed)

 0.4 to 1.0 V

C45*1-42 (LUSL) - C45*1-81 (E1)

C46*2-42 (LUSL) - C46*2-81 (E1)

 B - BR Diesel throttle duty signal (for Bank 1) Engine warmed up, racing engine

Pulse generation

(see waveform 4)

C45*1-84 (LUS2) - C45*1-81 (E1)

C46*2-84 (LUS2) - C46*2-81 (E1)

 B - BR Diesel throttle duty signal (for Bank 2) Engine warmed up, racing engine

Pulse generation

(see waveform 4)

C45*1-89 (EGLS) - C45*1-75 (E2)

C46*2-89 (EGLS) - C46*2-75 (E2)

 R-W - BR No. 1 EGR valve position sensor Ignition switch ON 3.0 to 4.6 V

C45*1-88 (EGS2) - C45*1-75 (E2)

C46*2-88 (EGS2) - C46*2-75 (E2)

 R-B - BR No. 2 EGR valve position sensor Ignition switch ON 3.0 to 4.6 V

C45*1-107 (EGRS) - C45*1-81 (E1)

C46*2-107 (EGRS) - C46*2-81 (E1)

 R - BR No. 1 EGR valve Engine warmed up and idling

Pulse generation

(see waveform 5)

C45*1-108 (ERS2) - C45*1-81 (E1)

C46*2-108 (ERS2) - C46*2-81 (E1)

 R-W - BR No. 2 EGR valve Engine warmed up and idling

Pulse generation

(see waveform 5)

C45*1-49 (VNTO) - C45*1-81 (E1)

C46*2-49 (VNTO) - C46*2-81 (E1)

 R-Y - BR Turbo motor driver (for Bank 1) Idling

Pulse generation

(see waveform 6)

C45*1-47 (VNO2) - C45*1-81 (E1)

C46*2-47 (VNO2) - C46*2-81 (E1)

 R-W - BR Turbo motor driver (for Bank 2) Idling

Pulse generation

(see waveform 6)

C45*1-50 (VNTI) - C45*1-81 (E1)

C46*2-50 (VNTI) - C46*2-81 (E1)

 R-L - BR Turbo motor driver (for Bank 1) Idling

Pulse generation

(see waveform 7)

C45*1-48 (VNI2) - C45*1-81 (E1)

C46*2-48 (VNI2) - C46*2-81 (E1)

 BR - BR Turbo motor driver (for Bank 2) Idling

Pulse generation

(see waveform 7)

A38*1-36 (STP) - C45*1-81 (E1)

A52*2-36 (STP) - C46*2-81 (E1)

 R - 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

A38*1-35 (ST1-) - C45*1-81 (E1)

A52*2-35 (ST1-) - C46*2-81 (E1)

 P - BR

Stop light switch

(opposite to STP)

 Ignition switch ON, brake pedal depressed 0 to 1.5 V
Ignition switch ON, brake pedal released 7.5 to 14 V

A38*1-15 (TACH) - C45*1-81 (E1)

A52*2-15 (TACH) - C46*2-81 (E1)

 W - BR Engine speed Idling

Pulse generation

(see waveform 8)

A38*1-8 (SPD) - C45*1-81 (E1)

A52*2-8 (SPD) - C46*2-81 (E1)

 V - BR Speed signal from combination meter Ignition switch ON, wheel rotated slowly

Pulse generation

(see waveform 9)

A38*1-48 (STA) - C45*1-81 (E1)

A52*2-48 (STA) - C46*2-81 (E1)

 R - BR Starter signal Cranking 6.0 V or more

C45*1-1 (ALT) - C45*1-81 (E1)

C46*2-1 (ALT) - C46*2-81 (E1)

 R - BR Generator duty ratio Idling Pulse generation

A38*1-27 (TC) - C45*1-81 (E1)

A52*2-27 (TC) - C46*2-81 (E1)

 V - BR Terminal TC of DLC3 Ignition switch ON 11 to 14 V

A38*1-24 (W) - C45*1-81 (E1)

A52*2-24 (W) - C46*2-81 (E1)

 R - BR MIL MIL illuminated 0 to 3 V
MIL not illuminated 11 to 14 V

A38*1-30 (AC1) - C45*1-81 (E1)

A52*2-30 (AC1) - C46*2-81 (E1)

 L - BR A/C signal A/C switch on 0 to 1.5 V
A/C switch off 11 to 14 V

A38*1-18 (ACT) - C45*1-81 (E1)

A52*2-18 (ACT) - C46*2-81 (E1)

 G - BR A/C signal Ignition switch ON 11 to 14 V
A/C cut control on 0 to 3 V

A38*1-42 (CLSW) - C45*1-81 (E1)

A52*2-42 (CLSW) - C46*2-81 (E1)

 B - BR Clutch start switch Ignition switch ON, clutch pedal fully depressed 0 to 3 V
Ignition switch ON, clutch pedal fully released 11 to 14 V

C45*1-2 (PS) - C45*1-81 (E1)

C46*2-2 (PS) - C46*2-81 (E1)

 P - BR Power steering oil pressure switch Steering wheel turned 0 to 3 V
Steering wheel not turned 11 to 14 V

C45*1-32 (FSW) - C45*1-81 (E1)

C46*2-32 (FSW) - C46*2-81 (E1)

 L*3 - BR Shift position switch Ignition switch ON, shift lever in 1 11 to 14 V
Ignition switch ON, shift lever not in 1 0 to 3 V

C45*1-45 (ACM) - C45*1-81 (E1)

C46*2-45 (ACM) - C46*2-81 (E1)

 L - BR VSV (for engine mounting) Idling 0 to 1.5 V

A38*1-43 (NSW) - C45*1-81 (E1)

A52*2-43 (NSW) - C46*2-81 (E1)

 L - BR Park/neutral position switch 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

A38*1-41 (CANH) - C45*1-81 (E1)

A52*2-41 (CANH) - C46*2-81 (E1)

 P - BR CAN communication line Ignition switch ON

Pulse generation)

(see waveform 10)

A38*1-49 (CANL) - C45*1-81 (E1)

A52*2-49 (CANL) - C46*2-81 (E1)

 B - BR CAN communication line Ignition switch ON

Pulse generation)

(see waveform 11)

A38*1-14 (STSW) - C45*1-81 (E1)

A52*2-14 (STSW) - C46*2-81 (E1)

 R - BR Ignition switch signal Shift lever in P or N, ignition switch pushed 6.0 V or more

A38*1-13 (ACCR) - C45*1-81 (E1)

A52*1-13 (ACCR) - C45*1-81 (E1)

 L-Y - BR ACC (Accessory) relay control signal Cranking Below 1.5 V

C45*1-51 (STAR) - C45*1-81 (E1)

C46*2-51 (STAR) - C46*2-81 (E1)

 L - BR Starter relay control Ignition switch ON Below 1.5 V
Cranking 6.0 V or more

C45*1-43 (FC) - C45*1-81 (E1)

C46*2-43 (FC) - C46*2-81 (E1)

 L-B - BR Sub pump relay Relay on 0 to 1.5 V
Relay off 7.5 to 14 V

Tech Tips


  • *1: for LHD

  • *2: for RHD

  • *3: for M/T


  1. WAVEFORM 1

    A01X6SJE24
    *a 5 V/DIV.
    *b 20 msec./DIV.
    Fuel Injector No. 1 (to No. 8) Injection Signal
    ECM Terminal Name From #1 to #8 and E1
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the injector injection.

  2. WAVEFORM 2

    A01XBOOE21
    *a 10 V/DIV.
    *b 5 msec./DIV.
    Suction Control Valve Signal
    ECM Terminal Name PCV+ and PCV-
    Tester Range 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.

  3. WAVEFORM 3

    A01X59CE19
    *a 2 V/DIV.
    *b 20 msec./DIV.
    Injector Injection Confirmation Signal
    ECM Terminal Name

    INJF and E1

    INF2 and E1
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the injector injection.

  4. WAVEFORM 4

    A01X9Q1E20
    *a 1 V/DIV.
    *b 2 msec./DIV.
    Diesel Throttle Motor Signal
    ECM Terminal Name

    LUSL and E1

    LUS2 and E1
    Tester Range 1 V/DIV., 2 msec./DIV.
    Condition Racing with warm engine

    Tech Tips

    The waveform varies depending on the throttle valve operation.

  5. WAVEFORM 5

    A01X4ZAE01
    *a 5 V/DIV.
    *b 5 msec./DIV.
    EGR Position Sensor Signal
    ECM Terminal Name

    EGRS and E1

    ERS2 and E1
    Tester Range 5 V/DIV., 5 msec./DIV.
    Condition Idling

    Tech Tips

    The waveform varies depending on the throttle valve operation.

  6. WAVEFORM 6

    A01X1BVE01
    *a 5 V/DIV.
    *b VNTO
    *c 20 msec./DIV.
    Turbo Motor Driver Input Signal
    ECM Terminal Name

    VNTO and E1

    VNO2 and E1
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the turbocharger operation.

  7. WAVEFORM 7

    A01X5AQE01
    *a 5 V/DIV.
    *b VNTI
    *c 50 msec./ DIV.
    Turbo Motor Driver Output Signal
    ECM Terminal Name

    VNTI and E1

    VNI2 and E1
    Tester Range 5 V/DIV., 50 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the turbocharger status.

  8. WAVEFORM 8

    A01XAR7E02
    *a 5 V/DIV.
    *b 10 msec./DIV.
    Engine Speed Signal
    ECM Terminal Names TACH and E1
    Tester Range 5 V/DIV., 10 msec./DIV.
    Conditions Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  9. WAVEFORM 9

    A01X2BFE23
    *a 5 V/DIV.
    *b 10 msec./DIV.
    Vehicle Speed Signal
    ECM Terminal Name SPD and E1
    Tester Range 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

    A01X1VPE25
    *a 1 V/DIV.
    *b 10 msec./DIV
    CAN Communication Signal
    ECM Terminal Name CAN+ and E1
    Tester Range 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

    A01X6OKE25
    *a 1 V/DIV.
    *b 10 msec./DIV.
    CAN Communication Signal
    ECM Terminal Name CAN- and E1
    Tester Range 1 V/DIV., 10 msec./DIV.
    Condition Engine stopped, ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.