ECD SYSTEM (w/o DPF) TERMINALS OF ECM

A01BAVCE07

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 "Symbols (Terminal No.)" 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.

Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
PCV+ (D1-2) - PCV- (D1-1) P - Y-R Suction control valve Idling

Pulse generation

(see waveform 1)
ALT (D1-8) - E1 (D3-7) W - BR Generator duty ratio Idling

Pulse generation

(see waveform 2)
VNTO (D1-10) - E1 (D3-7) Y-G - BR Turbo motor driver Idling

Pulse generation

(see waveform 3)
RFC2 (D1-11) - E1 (D3-7) P-L - BR No.2 cooling fan ECU Ignition switch ON, fan operating

Pulse generation

(See waveform 4)
RFC (D1-12) - E1 (D3-7) LG-B - BR No.1 cooling fan ECU Ignition switch ON, fan operating

Pulse generation

(See waveform 4)
FAN (D1-13) - E1 (D3-7) W-L - BR FAN3 relay (for No.3 cooling fan) No.3 cooling fan operating 0 to 3 V
No.3 cooling fan not operating 11 to 14 V
SCV (D1-15) - E01 (D1-7) W - BR VSV for swirl control valve Idling 0 to 1.5 V
Engine speed 2600 rpm or more 11 to 14 V
VNTI (D1-17) - E1 (D3-7) Y-B - BR Turbo motor driver Idling

Pulse generation

(see waveform 5)
VC (D1-18) - E2 (D1-28) L-B - Y-R Power source of sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
THW (D1-19) - E2 (D1-28) R-W - Y-R Engine coolant temperature sensor Idling, engine coolant temperature 60 to 120°C (140 to 248°F) 0.2 to 1.0 V
THIA (D1-20) - E2 (D1-28) R-L - Y-R Intake air temperature sensor (Diesel turbo IAT sensor) Higher than atmospheric air temperature 0.5 to 3.4 V
#4 (D1-21) - E1 (D3-7) B-Y - BR Injector Idling

Pulse generation

(see waveform 6)
#3 (D1-22) - E1 (D3-7) Y-B - BR
#2 (D1-23) - E1 (D3-7) G-Y - BR
#1 (D1-24) - E1 (D3-7) G-R - BR
INJF (D1-25) - E1 (D3-7) Y - BR EDU Idling

Pulse generation

(see waveform 7)
PCR1 (D1-26) - E2 (D1-28) P - Y-R Common rail pressure sensor (main) Idling, after warmed up 1.7 to 2.2 V
NE+ (D1-27) - NE- (D1-34) R - G Crankshaft position sensor Idling

Pulse generation

(see waveform 8)
THF (D1-29) - E2 (D1-28) R - Y-R Fuel temperature sensor Ignition switch ON 0.5 to 3.4 V
THA (D1-31) - E2 (D1-28) R - Y-R IAT sensor (built into MAF meter) Idling, intake air temperature 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
PRD (D1-32) - E1 (D3-7) Y - BR EDU Ignition switch OFF 4 to 6.5 V
PCR2 (D1-33) - E2 (D1-28) G-R - Y-R Common rail pressure sensor (sub) Idling, after warmed up 1.2 to 1.6 V
VCS (D3-2) - E2S (D3-1) G-B - G Power source of fuel pressure sensor (sub) Ignition switch ON 4.5 to 5.5 V
LUSL (D3-4) - E1 (D3-7) B - BR Diesel throttle motor duty signal Engine warmed up, racing engine

Pulse generation

(see waveform 9)
EGR (D3-9) - E1 (D3-7) B-W - BR E-VRV for EGR Ignition switch ON

Pulse generation

(see waveform 10)
EGRC (D3-18) - E1 (D3-7) W-L - BR VSV for EGR Cut Ignition switch ON, EGR cuts (accelerator pedal fully depressed) 0 to 1.5 V
G+ (D3-23) - G- (D3-31) R - G Camshaft position sensor Idling

Pulse generation

(see waveform 8)
VG (D3-24) - EVG (D3-32) B-L - B MAF meter Idling, A/C switch OFF 0.2 to 3.1 V
PIM (D3-28) - E2 (D1-28) P - Y-R Manifold absolute pressure sensor Apply negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) 0.1 to 0.7 V
Same as atmospheric pressure 0.8 to 1.5 V
Apply positive pressure of 170 kPa (1,275 mmHg, 50.2 in.Hg) 1.6 to 2.3 V
VLU (D3-29) - E2 (D1-28) R-L - Y-R Throttle position sensor

Ignition switch ON, throttle valve

fully opened

 3.6 to 4.2 V

Ignition switch ON, throttle valve

fully closed

 0.4 to 1.0 V
EGLS (D3-33) - E1 (D3-7) P - BR EGR valve position sensor Ignition switch ON 0.6 to 1.4 V
Idling 1.9 to 2.9 V
BATT (B7-2) - E1 (D3-7) B-R - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
ST1- (B7-14) - E1 (D3-7) R-L - 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
STP (B7-15) - E1 (D3-7) R-W - 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
SPD (B7-17) - E1 (D3-7) P-L - BR Speed signal from combination meter Ignition switch ON, slowly rotate wheel

Pulse generation

(see waveform 11)
CAN- (B7-21) - E1 (D3-7) W - BR CAN communication line Ignition switch ON

Pulse generation

(see waveform 12)
CAN+ (B7-22) - E1 (D3-7) L - BR CAN communication line Ignition switch ON

Pulse generation

(see waveform 13)
CANL (B7-23) - E1 (D3-7) W - BR CAN communication line During transmission

Pulse generation

(See waveform 12)
CANH (B7-24) - E1 (D3-7) B - BR CAN communication line During transmission

Pulse generation

(See waveform 13)
+B (B9-1) - E1 (D3-7) B-R - BR Power source of ECM Ignition switch ON 11 to 14 V
THWO (B9-2) - E1 (D3-7) Y - BR Engine coolant temperature signal for combination meter Ignition switch ON

Pulse generation

(See waveform 14)
TACH (B9-4) - E1 (D3-7) B-Y - BR Engine speed Idling

Pulse generation

(see waveform 15)
NSW (B9-6) - E1 (D3-7) B-W - BR Park neutral switch signal IG switch ON and shift lever P and N position Below 2 V
IG switch ON and shift lever except P and N position 11 to 14 V
STA (B9-7) - E1 (D3-7) R - BR Starter signal Cranking 6.0 V or higher
MREL (B9-8) - E1 (D3-7) G-Y - BR MAIN relay Ignition switch ON 11 to 14 V
10 seconds elapsed after ignition switch OFF 0 to 1.5 V
IGSW (B9-9) - E1 (D3-7) B-R - BR Ignition switch Ignition switch ON 11 to 14 V
IREL (B9-10) - E1 (D3-7) R-L - BR EDU relay Ignition switch ON 0 to 1.5 V
TC (B9-11) - E1 (D3-7) P - BR Terminal TC of DLC3 Ignition switch ON 11 to 14 V
W (B9-12) - E1 (D3-7) G-R - BR MIL MIL illuminated 0 to 3 V
MIL not illuminated 11 to 14 V
GIND (B9-14) - E1 (D3-7) B-W - BR Glow indicator light Glow indicator light illuminated soon after ignition switch turned ON Below 3 V
Idling 11 to 14 V
GREL (B9-15) - E1 (D3-7) G - BR GLOW relay Cranking 11 to 14 V
10 minutes after engine started 0 to 1.5 V
RTHW (B9-20) - E2 (D1-28) L-R - Y-R Engine coolant temperature sensor (for radiator) Idling, radiator side engine coolant temperature -20 to 80°C (-4 to 176°F) 0.5 to 4.5 V
VPA (B9-22) - EPA (B9-28) L - W-L Accelerator pedal position sensor (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
VPA2 (B9-23) - EPA2 (B9-29) B - W-R Accelerator pedal position sensor (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 5.0 V
VCPA (B9-26) - EPA (B9-28) W - W-L Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
VCP2 (B9-27) - EPA2 (B9-29) R-L - W-R Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
E02 (D1-6) - Body ground BR - Body ground Ground Always Below 1 Ω
E01 (D1-7) - Body ground BR - Body ground
E2 (D1-28) - Body ground Y-R - Body ground
E1 (D3-7) - Body ground BR - Body ground
EC (B7-6) - Body ground W-B - Body ground
E0M (B9-16) - Body ground W-B - Body ground

  1. WAVEFORM 1

    A01BBWLE07
    Suction control valve signal
    ECM Terminal Name Between 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.

  2. WAVEFORM 2

    A01BAXPE02
    Generator duty ratio signal
    ECM Terminal Name Between ALT and E1
    Tester Range 5 V/DIV, 2 msec./DIV
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.

  3. WAVEFORM 3

    A01BCH9E02
    Turbo motor driver input signal
    ECM Terminal Name Between VNTO 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.

  4. WAVEFORM 4

    A01BCWME02
    Cooling fan signal
    ECM Terminal Name

    Between RFC and E1

    Between RFC2 and E1
    Tester Range 1 V/DIV, 2 msec./DIV
    Condition Idling with warm engine, fan operating

    Tech Tips

    Waveform time A changes according to coolant temperature.

  5. WAVEFORM 5

    A01BA8LE02
    Turbo motor driver output signal
    ECM Terminal Name Between VNTI 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.

  6. WAVEFORM 6

    A01BG6IE07
    No. 1 (to No. 4) Injector injection signal
    ECM Terminal Name

    (a) Between #1 and E1

    (b) Between #3 and E1

    (c) Between #4 and E1

    (d) Between #2 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.

  7. WAVEFORM 7

    A01BBFYE08
    Injector injection confirmation signal
    ECM Terminal Name Between INJF 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.

  8. WAVEFORM 8

    A01BG6QE06
    Crankshaft position sensor signal and Camshaft position sensor signal
    ECM Terminal Name

    (a) Between NE+ and NE-

    (b) Between G+ and G-
    Tester Range 5 V/DIV, 20 msec./DIV
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the engine speed.

  9. WAVEFORM 9

    A01BHR0E06
    Diesel throttle motor signal
    ECM Terminal Name Between LUSL and E1
    Tester Range 1 V/DIV, 2 msec./DIV
    Condition Warm engine with racing engine

    Tech Tips

    The waveform varies depending on the throttle valve operation.

  10. WAVEFORM 10

    A01BE0RE09
    E-VRV for EGR signal
    ECM Terminal Name Between EGR and E1
    Tester Range 5 V/DIV, 1 msec./DIV
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the E-VRV (for E-EGR) operation.

  11. WAVEFORM 11

    A01BE8PE11
    Vehicle speed signal
    ECM Terminal Name Between 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.

  12. WAVEFORM 12

    A01BGF1E08
    CAN communication signal
    ECM Terminal Name

    Between CAN- and E1

    Between CANL and E1
    Tester Range 1 V/DIV, 10 msec./DIV
    Condition Engine is stopped, ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  13. WAVEFORM 13

    A01BBOLE08
    CAN communication signal
    ECM Terminal Name

    Between CAN+ and E1

    Between CANH and E1
    Tester Range 1 V/DIV, 10 msec./DIV
    Condition Engine is stopped, ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  14. WAVEFORM 14

    A01BE5FE04
    Engine coolant temperature signal for combination meter
    ECM Terminal Name Between THWO and E1
    Tester Range 5 V/DIV, 100 msec./DIV
    Condition Idling

    Tech Tips

    Waveform time A changes according to coolant temperature.

  15. WAVEFORM 15

    A01BE8PE11
    Engine speed signal
    ECM Terminal Name Between TACH and E1
    Tester Range 5 V/DIV, 10 msec./DIV
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine rpm increases.