ECD SYSTEM TERMINALS OF ECM

A318632E02
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

A50-1 (+B3) - A50-17 (E3)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A50-2 (+B) - A50-17 (E3)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A50-4 (E1) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A50-5 (E2) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A50-7 (D) - A50-4 (E1)

GR - 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

A50-9 (MREL) - A50-17 (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

A50-10 (ST1-) - A50-4 (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

A50-11 (R) - A50-4 (E1)

R - W-B

Back-up light switch signal

Back-up light switch ON

11 to 14 V

A50-12 (CANN) - A50-4 (E1)

SB - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 1)

A50-13 (CANP) - A50-4 (E1)

B - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 2)

A50-14 (+B2) - A50-17 (E3)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A50-15 (BATT) - A50-17 (E3)

B - W-B

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

Always

11 to 14 V

A50-17 (E3) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A50-18 (E4) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A50-20 (FANL) - A50-4 (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

A50-21 (TACH) - A50-4 (E1)

GR - W-B

Engine speed

Idling

Pulse generation

(See waveform 3)

A50-25 (CANL) - A50-4 (E1)

W - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 4)

A50-26 (CANH) - A50-4 (E1)

B - W-B

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 5)

A50-27 (VCPA) - A50-22 (EPA)

L - R

Power source of accelerator pedal sensor assembly (for VPA)

Ignition switch ON

4.5 to 5.5 V

A50-29 (VCP2) - A50-23 (EPA2)

LG - G

Power source of accelerator pedal sensor assembly (for VPA2)

Ignition switch ON

4.5 to 5.5 V

A50-30 (ELS2) - A50-4 (E1)

B - W-B

Electric load

Defogger switch ON

7.5 to 14 V

Defogger switch off

0 to 1.5 V

A50-32 (MHSW)* - A50-4 (E1)

R - W-B

Power heater switch signal

Power heater switch ON

11 to 14 V

A50-36 (STA) - A50-4 (E1)

LG - W-B

Starter signal

Cranking

6.0 V or higher

A50-37 (IGSW) - A50-17 (E3)

B - W-B

Ignition switch signal

Ignition switch ON

11 to 14 V

A50-43 (VPA2) - A50-23 (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

A50-45 (FANH) - A50-4 (E1)

W - W-B

Cooling fan (high speed)

Idling with high engine coolant temperature

Below 1.5 V

A50-48 (STP) - A50-4 (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

A50-50 (TC) - A50-4 (E1)

P - W-B

Terminal TC of DLC3

Ignition switch ON

11 to 14 V

A50-51 (SPD) - A50-4 (E1)

V - W-B

Speed signal from combination meter

Ignition switch ON, drive wheels rotating slowly

Pulse generation

(See waveform 6)

A50-52 (VPA) - A50-22 (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

A50-59 (W) - A50-4 (E1)

V - W-B

MIL

MIL illuminated

Below 3 V

MIL not illuminated

11 to 14 V

A50-60 (FC) - A50-4 (E1)

B - W-B

FUEL PUMP relay

Ignition switch ON

11 to 14 V

Idling

Below 1.5 V

B220-16 (ECBV) - A50-4 (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

B220-17 (HAF2) - A50-5 (E2)

W-G - W-B

Air fuel ratio sensor heater (for sensor 2)

Ignition switch ON

11 to 14 V

Idling with warm engine

Pulse generation

(See waveform 7)

B220-21 (VN-A) - A50-4 (E1)

W-B - W-B

VN turbocharger motor

Idling with warm engine

Pulse generation

(See waveform 8)

B220-24 (VCPE) - A50-4 (E1)

L - W-B

Power source of exhaust gas pressure sensor

Ignition switch ON

4.5 to 5.5 V

B220-26 (IJ4+) - B220-56 (IJ4-)

G-R - BR-G

No. 4 injector assembly

Idling with warm engine

Pulse generation

(See waveform 9)

B220-27 (IJ3+) - B220-57 (IJ3-)

R-Y - BR-Y

No. 3 injector assembly

Idling with warm engine

Pulse generation

(See waveform 9)

B220-28 (IJ2+) - B220-58 (IJ2-)

R-L - BR-L

No. 2 injector assembly

Idling with warm engine

Pulse generation

(See waveform 9)

B220-29 (IJ1+) - B220-59 (IJ1-)

R-W - BR-W

No. 1 injector assembly

Idling with warm engine

Pulse generation

(See waveform 9)

B220-30 (PCV) - A50-4 (E1)

W-V - W-B

Fuel quantity control valve

Idling with warm engine

Pulse generation

(See waveform 10)

B220-46 (HAF1) - A50-5 (E2)

W-Y - W-B

Air fuel ratio sensor heater (for sensor 1)

Ignition switch ON

11 to 14 V

Idling with warm engine

Pulse generation

(See waveform 7)

B220-48 (EGM+) - B220-18 (EGM-)

GR-R - W-Y

EGR valve assembly (Motor)

Idling with warm engine

Pulse generation

(See waveform 11)

B220-49 (IA1+) - B220-19 (IA1-)

W-GR - W-G

Swirl control valve (Motor)

Idling with warm engine

Pulse generation

(See waveform 12)

B220-50 (M+) - B220-20 (M-)

W-R - W-L

Diesel throttle duty signal

Idling with warm engine

Pulse generation

(See waveform 13)

B220-51 (VN+A) - A50-4 (E1)

W - W-B

VN turbocharger motor

Idling with warm engine

Pulse generation

(See waveform 14)

B220-54 (VCS) - B220-102 (E2S)

L-W - BR-GR

Power source of fuel pressure sensor

Ignition switch ON

4.5 to 5.5 V

B220-60 (PRV) - A50-5 (E2)

W-B - W-B

Pressure discharge valve

Ignition switch ON

Pulse generation

(See waveform 15)

B220-61 (VPIM) - B220-76 (EPIM)

L-G - BR-L

Power source of turbo pressure sensor assembly

Ignition switch ON

4.75 to 5.25 V

B220-65 (VNVC) - B220-112 (VNE2)

L-B - BR-O

Power source of nozzle vane position sensor

Ignition switch ON

4.5 to 5.5 V

B220-68 (G+) - B220-115 (G-)

Y-V - BR-Y

Camshaft position sensor

Idling with warm engine

Pulse generation

(See waveform 16)

B220-69 (VCEG) - B220-84 (EEGL)

L - BR-G

Power source of EGR valve position sensor

Ignition switch ON

4.5 to 5.5 V

B220-70 (VCPX) - B220-71 (EPEX)

L - BR-V

Power source of differential pressure sensor

Ignition switch ON

4.5 to 5.5 V

B220-72 (VAC1) - A50-5 (E2)

L-Y -W-B

Power source of swirl control valve

Ignition switch ON

4.5 to 5.5 V

B220-74 (LIN) - B220-96 (EGCU)

V-W - BR-W

LIN communication

Ignition switch ON

Pulse generation

(See waveform 17)

B220-79 (THIA) - B220-89 (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

B220-80 (VTAI) - B220-112 (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

B220-82 (THW) - B220-113 (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

B220-83 (VCTA) - B220-81 (ETA)

L-W - BR-O

Power source of diesel throttle position sensor

Ignition switch ON

4.5 to 5.5 V

B220-85 (PEX) - B220-71 (EPEX)

Y-W - BR-V

Differential pressure sensor

Ignition switch ON

0.7 to 1.3 V

Idling with warm engine

0.5 to 4.5 V

B220-87 (IAC1) - B220-119 (EAC1)

Y -BR-B

Swirl control valve (Position sensor)

Idling with warm engine

0.5 to 4.5 V

B220-92 (THCI) - B220-91 (ETCI)

Y-L - BR-Y

Exhaust gas temperature sensor (for sensor 1)

Idling with warm engine

2.9 to 3.3 V

B220-93 (THF) - B220-124 (ETHF)

L-G - BR-G

Fuel temperature sensor

Ignition switch ON

0.5 to 2.0 V

B220-97 (VG) - B220-129 (EVG)

Y-B - BR-B

Mass air flow meter signal

Ignition switch ON

Pulse generation

(See waveform 18)

B220-101 (PC) - B220-102 (E2S)

Y-GR - BR-GR

Fuel pressure sensor

Idling

1.0 to 1.3 V

B220-103 (PEXM) - B220-135 (EPEM)

Y - BR-O

Exhaust gas pressure sensor

Ignition switch ON (same as atmosphere pressure)

0.7 to 1.3 V

B220-109 (THCO) - B220-110 (ETCO)

GR-W - BR

Exhaust gas temperature sensor (for sensor 2)

Idling with warm engine

2.9 to 3.3 V

B220-111 (PIM) - B220-76 (EPIM)

B-L - BR-L

Turbo pressure sensor assembly

Ignition switch ON (same as atmosphere pressure)

0.8 to 1.4 V

B220-114 (THA) - B220-129 (EVG)

GR-B - BR-B

Intake air temperature sensor (built into mass air flow meter sub-assembly)

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

0.5 to 2.0 V

B220-116 (EGLS) - B220-84 (EEGL)

B - BR-G

EGR valve assembly (Position sensor)

Idling with warm engine

0.5 to 4.5 V

B220-118 (THEC) - B220-86 (ETEC)

Y-L - BR-Y

EGR gas temperature sensor

Idling with warm engine

0 to 5 V

B220-117 (VTA1) - B220-81 (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

B220-121 (NE+) - B220-90 (NE-)

B-R - BR-R

Crankshaft position sensor

Idling with warm engine

Pulse generation

(See waveform 19)

B220-125 (RE1) - A50-5 (E2)

B-Y - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

2.1 to 3.5 V

B220-126 (AF1-) - A50-5 (E2)

BR - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

2.35 to 2.65 V

B220-127 (AF1+) - A50-5 (E2)

GR-BR - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

1.5 to 4.9 V

B220-128 (TR1) - A50-5 (E2)

GR-L - W-B

Air fuel ratio sensor signal (for sensor 1)

Idling with warm engine

1.5 to 4.9 V

B220-131 (TR2) - A50-5 (E2)

GR-W - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

1.5 to 4.9 V

B220-130 (AF2+) - A50-5 (E2)

GR - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

1.5 to 4.9 V

B220-133 (AF2-) - A50-5 (E2)

BR-R - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

2.35 to 2.65 V

B220-134 (RE2) - A50-5 (E2)

B-W - W-B

Air fuel ratio sensor signal (for sensor 2)

Idling with warm engine

2.1 to 3.5 V

*: w/ Power Heater (Combination Type)

  1. WAVEFORM 1

    A342527E01
    Table 1. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANN and E1

    Tester Range

    1 V/DIV., 20 μs./DIV.

    Condition

    Ignition switch ON

  2. WAVEFORM 2

    A342528E01
    Table 2. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANP and E1

    Tester Range

    1 V/DIV., 20 μs./DIV.

    Condition

    Ignition switch ON

  3. WAVEFORM 3

    A342539E01
    Table 3. Engine speed signal

    Item

    Content

    ECM Terminal Name

    Between TACH and E1

    Tester Range

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

    Condition

    Idling

  4. WAVEFORM 4

    A342526E01
    Table 4. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANL and E1

    Tester Range

    1 V/DIV., 50 μs./DIV.

    Condition

    Ignition switch ON

  5. WAVEFORM 5

    A342525E01
    Table 5. CAN communication signal

    Item

    Content

    ECM Terminal Name

    Between CANH and E1

    Tester Range

    1 V/DIV., 50 μs./DIV.

    Condition

    Ignition switch ON

  6. WAVEFORM 6

    A355618E01
    Table 6. 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.

  7. WAVEFORM 7

    A342531E01
    Table 7. 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

  8. WAVEFORM 8

    A342541E01
    Table 8. 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

  9. WAVEFORM 9

    A342533E01
    Table 9. 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

  10. WAVEFORM 10

    A342537E01
    Table 10. 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

  11. WAVEFORM 11

    A342529E01
    Table 11. 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

  12. WAVEFORM 12

    A342532E01
    Table 12. 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

  13. WAVEFORM 13

    A342535E01
    Table 13. 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

  14. WAVEFORM 14

    A342542E01
    Table 14. 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

  15. WAVEFORM 15

    A342538E01
    Table 15. 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

  16. WAVEFORM 16

    A342530E01
    Table 16. 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

  17. WAVEFORM 17

    A342534E01
    Table 17. LIN communication signal

    Item

    Content

    ECM Terminal Name

    Between LIN and EGCU

    Tester Range

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

    Condition

    Ignition switch ON

  18. WAVEFORM 18

    A342540E01
    Table 18. 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

  19. WAVEFORM 19

    A342536E01
    Table 19. 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