ECD SYSTEM(for Swirl Control Valve) TERMINALS OF ECM

U122227E02
Tip:

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

  • The result of checks should be compared with the standard voltage for that pair of terminals, and 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

A76-2 (+B) - A76-17 (E3)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A76-14 (+B2) - A76-17 (E3)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A76-1 (+B3) - A76-17 (E3)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A76-9 (MREL) - A76-17 (E3)

W - W-B

EFI MAIN relay

Ignition switch ON

11 to 14 V

45 seconds elapsed since ignition switch off

0 to 1.5 V

A76-15 (BATT) - A76-17 (E3)

B - W-B

Battery (for measuring the battery voltage and for the ECM memory)

Always

11 to 14 V

A76-37 (IGSW) - A76-17 (E3)

B - W-B

Ignition switch signal

Ignition switch ON

11 to 14 V

A76-52 (VPA) - A76-22 (EPA)

W - R

Accelerator pedal sensor assembly (for engine control)

Ignition switch ON, accelerator pedal fully released

0.5 to 1.1 V

Ignition switch ON, accelerator pedal fully depressed

2.6 to 4.5 V

A76-43 (VPA2) - A76-23 (EPA2)

Y - G

Accelerator pedal sensor assembly (for sensor malfunction detection)

Ignition switch ON, accelerator pedal fully released

1.2 to 2.0 V

Ignition switch ON, accelerator pedal fully depressed

3.4 to 4.75 V

A76-27 (VCPA) - A76-22 (EPA)

L - R

Power source of accelerator pedal sensor assembly (for VPA)

Ignition switch ON

4.5 to 5.5 V

A76-29 (VCP2) - A76-23 (EPA2)

LG - G

Power source of accelerator pedal sensor assembly (for VPA2)

Ignition switch ON

4.5 to 5.5 V

C112-83 (VCTA) - C112-81 (ETA)

L-W - BR-O

Power source of diesel throttle position sensor

Ignition switch ON

4.5 to 5.5 V

C112-117 (VTA1) - C112-81 (ETA)

GR-W - BR-O

Diesel throttle position sensor

Throttle valve fully opened

3.2 to 4.9 V

Throttle valve fully closed

0.5 to 1.1 V

C112-50 (M+) - C112-20 (M-)

W-R - W-L

Diesel throttle duty signal

Idling with warm engine

Pulse generation

(See waveform 1)

C112-46 (HAF1) - A76-5 (E2)

W-Y - W-B

Air fuel ratio sensor heater (for sensor 1)

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(See waveform 2)

C112-127 (AF1+) - A76-5 (E2)

GR-BR - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

1.5 to 4.9 V

C112-126 (AF1-) - A76-5 (E2)

BR - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

2.35 to 2.65 V

C112-128 (TR1) - A76-5 (E2)

GR-L - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

1.5 to 4.9 V

C112-125 (RE1) - A76-5 (E2)

B-Y - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

2.1 to 3.5 V

C112-93 (THF) - C112-124 (ETHF)

L-G - BR-G

Fuel temperature sensor

Ignition switch ON

0.5 to 2.0 V

C112-54 (VCS) - C112-102 (E2S)

L-W - BR-GR

Power source of fuel pressure sensor

Ignition switch ON

4.5 to 5.5 V

C112-101 (PC) - C112-102 (E2S)

Y-GR - BR-GR

Fuel pressure sensor

Idling

1.0 to 1.3 V

C112-97 (VG) - C112-129 (EVG)

Y-B - BR-B

Mass air flow meter signal

Ignition switch ON

Pulse generation

(See waveform 3)

C112-114 (THA) - C112-129 (EVG)

GR-B - BR-B

Intake air temperature sensor (built into mass air flow meter)

Idling, intake air temperature 20°C (68°F)

0.5 to 2.0 V

C112-30 (PCV) - A76-4 (E1)

W-V - W-B

Fuel quantity control valve

Idling

Pulse generation

(See waveform 4)

C112-29 (IJ1+) - C112-59 (IJ1-)

R-W - BR-W

No. 1 injector assembly

Idling

Pulse generation

(See waveform 5)

C112-28 (IJ2+) - C112-58 (IJ2-)

R-L - BR-L

No. 2 injector assembly

Idling

Pulse generation

(See waveform 5)

C112-27 (IJ3+) - C112-57 (IJ3-)

R-Y - BR-Y

No. 3 injector assembly

Idling

Pulse generation

(See waveform 5)

C112-26 (IJ4+) - C112-56 (IJ4-)

R-G - BR-G

No. 4 injector assembly

Idling

Pulse generation

(See waveform 5)

C112-92 (THCI) - C112-91 (ETCI)

Y-L - BR-Y

Exhaust gas temperature sensor (for sensor 1)

Idling with warm engine

2.9 to 3.3 V

C112-109 (THCO) - C112-110 (ETCO)

GR-W - BR

Exhaust gas temperature sensor (for sensor 2)

Idling with warm engine

2.9 to 3.3 V

C112-82 (THW) - C112-113 (ETHW)

B-V - BR-B

Engine coolant temperature sensor

Idling, engine coolant temperature 60 to 120°C (140 to 248°F)

0.2 to 1.0 V

C112-79 (THIA) - C112-89 (ETHI)

B-W - BR-W

Intake air temperature sensor

Idling, intake air temperature at 0 to 80°C (32 to 176°F)

0.5 to 2.0 V

C112-61 (VPIM) - C112-76 (EPIM)

L-G - BR-L

Power source of turbo pressure sensor assembly

Ignition switch ON

4.75 to 5.25 V

C112-111 (PIM) - C112-76 (EPIM)

B-L - BR-L

Turbo pressure sensor assembly

Ignition switch ON (same as atmosphere pressure)

0.8 to 1.4 V

C112-65 (VNVC) - C112-112 (VNE2)

L-B - BR-O

Power source of nozzle vane position sensor

Ignition switch ON

4.5 to 5.5 V

C112-80 (VTAI) - C112-112 (VNE2)

GR-W - BR-O

Nozzle vane position sensor

VN turbocharger fully closed

0.9 to 2.1 V

VN turbocharger fully opened

3.0 to 4.1 V

C112-51 (VN+A) - A76-4 (E1)

W - W-B

VN turbocharger motor

Idling with warm engine

Pulse generation

(See waveform 6)

C112-21 (VN-A) - A76-4 (E1)

W-B - W-B

VN turbocharger motor

Idling with warm engine

Pulse generation

(See waveform 7)

C112-16 (ECBV) - A76-4 (E1)

W-R - W-B

EGR cooler bypass switching valve assembly

Ignition switch ON with cold engine

0 to 1.5 V

Idling with warm engine

11 to 14 V

C112-69 (VCEG) - C112-84 (EEGL)

L - BR-G

Power source of EGR valve position sensor

Ignition switch ON

4.5 to 5.5 V

C112-70 (VCPX) - C112-71 (EPEX)

L-GR - BR-O

Power source of differential pressure sensor

Ignition switch ON

4.5 to 5.5 V

A76-7 (D) - A76-4 (E1)

W - W-B

No. 2 clutch start switch assembly

Ignition switch ON, clutch pedal released

11 to 14 V

Ignition switch ON, clutch pedal depressed

0 to 1.5 V

A76-36 (STA) - A76-4 (E1)

LG - W-B

Starter signal

Cranking

6.0 V or higher

A76-21 (TACH) - A76-4 (E1)

GR - W-B

Engine speed

Idling

Pulse generation

(See waveform 8)

A76-48 (STP) - A76-4 (E1)

V - W-B

Stop light switch assembly

Ignition switch ON, brake pedal depressed

7.5 to 14 V

Ignition switch ON, brake pedal released

0 to 1.5 V

A76-10 (ST1-) - A76-4 (E1)

R-W - W-B

Stop light switch assembly

(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

A76-51 (SPD) - A76-4 (E1)

Y - W-B

Speed signal from combination meter

Ignition switch ON, drive wheels rotating slowly

Pulse generation

(See waveform 9)

A76-59 (W) - A76-4 (E1)

LG - W-B

MIL

MIL illuminated

Below 3 V

MIL not illuminated

11 to 14 V

A76-50 (TC) - A76-4 (E1)

P - W-B

Terminal TC of DLC3

Ignition switch ON

11 to 14 V

A76-20 (FANL) - A76-4 (E1)

R - W-B

Cooling fan (low speed)

Ignition switch ON

11 to 14 V

Idling with A/C on or high engine coolant temperature

Below 1.5 V

A76-45 (FANH) - A76-4 (E1)

W - W-B

Cooling fan (high speed)

Idling with high engine coolant temperature

Below 1.5 V

A76-30 (ELS2) - A76-4 (E1)

B - W-B

Electric load

Defogger switch ON

7.5 to 14 V

Defogger switch off

0 to 1.5 V

A76-32 (MHSW) - A76-4 (E1)

Y - W-B

Power heater switch signal

Power heater switch ON

11 to 14 V

A76-11 (R) - A76-4 (E1)

R - W-B

Back-up light switch signal

Back-up light switch ON

11 to 14 V

A76-26 (CANH) - A76-4 (E1)

Y - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 10)

A76-25 (CANL) - A76-4 (E1)

W - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 11)

A76-13 (CANP) - A76-4 (E1)

R - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 12)

A76-12 (CANN) - A76-4 (E1)

W - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 13)

C112-121 (NE+) - C112-90 (NE-)

B-R - BR-R

Crankshaft position sensor

Idling with warm engine

Pulse generation

(See waveform 14)

C112-68 (G+) - C112-115 (G-)

Y-V - BR-Y

Camshaft position sensor

Idling with warm engine

Pulse generation

(See waveform 15)

A76-60 (FC) - A76-4 (E1)

B - W-B

FUEL PUMP relay

Ignition switch ON

11 to 14 V

Idling

Below 1.5 V

C112-74 (LIN) - C112-96 (EGCU)

V-W - BR-W

LIN communication

Ignition switch ON

Pulse generation

(See waveform 16)

C112-85 (PEX) - C112-71 (EPEX)

B - BR-O

Differential pressure sensor

Ignition switch ON

0.7 to 1.3 V

Idling with warm engine

0.5 to 4.5 V

C112-24 (VCPE) - A76-4 (E1)

L - W-B

Power source of exhaust gas pressure sensor

Ignition switch ON

4.5 to 5.5 V

C112-103 (PEXM) - C112-135 (EPEM)

Y - BR-O

Exhaust gas pressure sensor

Ignition switch ON (same as atmosphere pressure)

0.7 to 1.3 V

C112-60 (PRV) - A76-5 (E2)

W-B - W-B

Pressure discharge valve

Ignition switch ON

Pulse generation

(See waveform 17)

C112-130 (AF2+) - A76-5 (E2)

GR - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

1.5 to 4.9 V

C112-133 (AF2-) - A76-5 (E2)

BR-R - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

2.35 to 2.65 V

C112-131 (TR2) - A76-5 (E2)

GR-W - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

1.5 to 4.9 V

C112-134 (RE2) - A76-5 (E2)

B-W - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

2.1 to 3.5 V

C112-17 (HAF2) - A76-4 (E1)

W-G - W-B

Air fuel ratio sensor heater (for sensor 2)

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(See waveform 2)

C112-48 (EGM+) - C112-18 (EGM-)

GR-R - W-Y

EGR valve assembly (Motor)

Idling with warm engine

Pulse generation

(See waveform 18)

C112-116 (EGLS) - C112-84 (EEGL)

B - BR-G

EGR valve assembly (Position sensor)

Idling with warm engine

0.5 to 4.5 V

C112-72 (VAC1) - A76-5 (E2)

L-Y -W-B

Power source of swirl control valve

Ignition switch ON

4.5 to 5.5 V

C112-87 (IAC1) - C112-119 (EAC1)

Y -BR-B

Swirl control valve (Position sensor)

Idling with warm engine

0.5 to 4.5 V

C112-49 (IA1+) - C112-19 (IA1-)

W-GR - W-G

Swirl control valve (Motor)

Idling with warm engine

Pulse generation

(See waveform 19)

C112-118 (THEC) - C112-86 (ETEC)

Y-L - BR-Y

EGR gas temperature sensor

Idling with warm engine

0 to 5 V

A76-4 (E1) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A76-5 (E2) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A76-17 (E3) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A76-18 (E4) - Body ground

W-B - -

Ground

Always

Below 1 Ω

  1. WAVEFORM 1

    A342535E01
    Table 1. Diesel throttle duty signal

    Item

    Content

    ECM Terminal Name

    Between M+ and M-

    Tester Range

    5 V/DIV., 200 μs./DIV.

    Condition

    Idling with warm engine

  2. WAVEFORM 2

    A342531E01
    Table 2. Air fuel ratio sensor heater signal

    Item

    Content

    ECM Terminal Name

    Between HAF1 and E2

    Between HAF2 and E2

    Tester Range

    5 V/DIV., 5 ms./DIV.

    Condition

    Idling with warm engine

  3. WAVEFORM 3

    A342540E01
    Table 3. Mass air flow meter signal

    Item

    Content

    ECM Terminal Name

    Between VG and EVG

    Tester Range

    1 V/DIV., 200 μs./DIV.

    Condition

    Ignition switch ON

  4. WAVEFORM 4

    A342537E01
    Table 4. Fuel quantity control valve signal

    Item

    Content

    ECM Terminal Name

    Between PCV and E1

    Tester Range

    5 V/DIV., 2 ms./DIV.

    Condition

    Idling with warm engine

  5. WAVEFORM 5

    A342533E01
    Table 5. Injector signal

    Item

    Content

    ECM Terminal Name

    Between IJ1+ and IJ1-

    Between IJ2+ and IJ2-

    Between IJ3+ and IJ3-

    Between IJ4+ and IJ4-

    Tester Range

    15 V/DIV., 200 μs./DIV.

    Condition

    Idling with warm engine

  6. WAVEFORM 6

    A342542E01
    Table 6. VN turbocharger motor signal

    Item

    Content

    ECM Terminal Name

    Between VN+A and E1

    Tester Range

    5 V/DIV., 200 μs./DIV.

    Condition

    Idling with warm engine

  7. WAVEFORM 7

    A342541E01
    Table 7. VN turbocharger motor signal

    Item

    Content

    ECM Terminal Name

    Between VN-A and E1

    Tester Range

    5 V/DIV., 200 μs./DIV.

    Condition

    Idling with warm engine

  8. WAVEFORM 8

    A342539E01
    Table 8. Engine speed signal

    Item

    Content

    ECM Terminal Name

    Between TACH and E1

    Tester Range

    5 V/DIV., 20 ms./DIV.

    Condition

    Idling with warm engine

  9. WAVEFORM 9

    A389830E01
    Table 9. Vehicle speed signal

    Item

    Content

    ECM Terminal Name

    Between SPD and E1

    Tester Range

    5 V/DIV., 20 ms./DIV.

    Condition

    Ignition switch ON, drive wheels rotating slowly
    Tip:

    The wavelength becomes shorter as the vehicle speed increases.

  10. WAVEFORM 10

    A342525E01
    Table 10. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANH and E1

    Tester Range

    1 V/DIV., 50 μs./DIV.

    Condition

    Ignition switch ON

  11. WAVEFORM 11

    A342526E01
    Table 11. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANL and E1

    Tester Range

    1 V/DIV., 50 μs./DIV.

    Condition

    Ignition switch ON

  12. WAVEFORM 12

    A342528E01
    Table 12. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANP and E1

    Tester Range

    1 V/DIV., 20 μs./DIV.

    Condition

    Ignition switch ON

  13. WAVEFORM 13

    A342527E01
    Table 13. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANN and E1

    Tester Range

    1 V/DIV., 20 μs./DIV.

    Condition

    Ignition switch ON

  14. WAVEFORM 14

    A342536E01
    Table 14. Crankshaft position sensor signal

    Item

    Content

    ECM Terminal Name

    Between NE+ and NE-

    Tester Range

    2 V/DIV., 10 ms./DIV.

    Condition

    Idling with warm engine

  15. WAVEFORM 15

    A342530E01
    Table 15. Camshaft position sensor signal

    Item

    Content

    ECM Terminal Name

    Between G+ and G-

    Tester Range

    1 V/DIV., 20 ms./DIV.

    Condition

    Idling with warm engine

  16. WAVEFORM 16

    A342534E01
    Table 16. LIN communication signal

    Item

    Content

    ECM Terminal Name

    Between LIN and EGCU

    Tester Range

    5 V/DIV., 1 ms./DIV.

    Condition

    Ignition switch ON

  17. WAVEFORM 17

    A342538E01
    Table 17. Pressure discharge valve signal

    Item

    Content

    ECM Terminal Name

    Between PRV and E2

    Tester Range

    5 V/DIV., 1 ms./DIV.

    Condition

    Ignition switch ON

  18. WAVEFORM 18

    A342529E01
    Table 18. EGR valve motor signal

    Item

    Content

    ECM Terminal Name

    Between EGM+ and EGM-

    Tester Range

    5 V/DIV., 200 μs./DIV.

    Condition

    Idling with warm engine

  19. WAVEFORM 19

    A342532E01
    Table 19. Swirl control valve motor signal

    Item

    Content

    ECM Terminal Name

    Between IA1+ and IA1-

    Tester Range

    5 V/DIV., 1 ms./DIV.

    Condition

    Idling with warm engine