ECD SYSTEM (w/o EGR Cooler Bypass Valve) TERMINALS OF ECM

A01KFUOE48

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
BATT (E8-2) - E1 (E5-7) B-Y - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to14 V
IGSW (E7-9) - E1 (E5-7) B-O - BR Ignition switch Ignition switch ON 11 to14 V
+B (E7-1) - E1 (E5-7) B-R - BR Power source of ECM Ignition switch ON 11 to14 V
MREL (E7-8) - E1 (E5-7) R-B - BR MAIN relay Ignition switch ON 11 to14 V
MREL (E7-8) - E1 (E5-7) R-B - BR MAIN relay 10 seconds elapsed after ignition switch OFF 0 to 1.5 V
VC (E6-18) - E2 (E6-28) G-Y - BR Power source of sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
VPA (E7-22) - EPA (E7-28) W - R-W Accelerator pedal position sensor (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V
VPA (E7-22) - EPA (E7-28) W - R-W Accelerator pedal position sensor (for engine control) Ignition switch ON, accelerator pedal fully depressed 3.0 to 4.6 V
VPA2 (E7-23) - EPA2 (E7-29) G-B - BR Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 0.9 to 2.3 V
VPA2 (E7-23) - EPA2 (E7-29) G-B - BR Accelerator pedal position sensor (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully depressed 3.4 to 5.0 V
VCPA (E7-26) - EPA (E7-28) G-Y - R-W Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V
VCP2 (E7-27) - EPA2 (E7-29) Y - BR Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V
VG (E5-24) - EVG (E5-32) Y-R - G-R MAF meter Idling, A/C switch OFF 0.5 to 3.4 V
THA (E6-31) - E2 (E6-28) W-G - BR IAT sensor (built into MAF meter) Idling, intake air temperature at 20°C (68°F) 0.5 to 3.4 V
THIA (E6-20) - E2 (E6-28) L-R - BR Diesel turbo IAT sensor Atmospheric air temperature 0.5 to 3.4 V
THW (E6-19) - E2 (E6-28) B-Y - BR ECT sensor Idling, engine coolant temperature at 80°C (176°F) 0.2 to 1.0 V
STA (E7-7) - E1 (E5-7) B - BR Starter signal Cranking 6.0 V or more

#1 (E6-24) - E1 (E5-7)

#2 (E6-23) - E1 (E5-7)

#3 (E6-22) - E1 (E5-7)

#4 (E6-21) - E1 (E5-7)

Y-R - BR

V - BR

L-R - BR

G-B - BR

 Injector Idling

Pulse generation

(see waveform 2)
G+ (E5-23) - G- (E5-31) G - R Camshaft position sensor Idling

Pulse generation

(see waveform 4)
NE+ (E6-27) - NE- (E6-34) B - W Crankshaft position sensor Idling

Pulse generation

(see waveform 4)
STP (E8-15) - E1 (E5-7) G-W - BR Stop light switch Ignition switch ON, brake pedal depressed 7.5 to 14 V
STP (E8-15) - E1 (E5-7) G-W - BR Stop light switch Ignition switch ON, brake pedal released 0 to 1.5 V
ST1- (E8-14) - E1 (E5-7) G - BR

Stop light switch

(opposite to STP)

 Ignition switch ON, brake pedal depressed 0 to 1.5 V
ST1- (E8-14) - E1 (E5-7) G - BR

Stop light switch

(opposite to STP)

 Ignition switch ON, brake pedal released 7.5 to 14 V
TC (E7-11) - E1 (E5-7) P-B -BR Terminal TC of DLC3 Ignition switch ON 11 to14 V
W (E7-12) - E1 (E5-7) W-L - BR MIL MIL illuminated 0 to 3 V
W (E7-12) - E1 (E5-7) W-L - BR MIL MIL not illuminated 11 to14 V
SPD (E8-17) - E1 (E5-7) V-W - BR Speed signal from combination meter Ignition switch ON, slowly rotate wheel

Pulse generation

(see waveform 9)
PIM (E5-28) - E2 (E6-28) R-Y - BR Manifold absolute pressure sensor Apply negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) 0.1 to 0.7 V
PIM (E5-28) - E2 (E6-28) R-Y - BR Manifold absolute pressure sensor Same as atmospheric pressure 0.8 to 1.5 V
PIM (E5-28) - E2 (E6-28) R-Y - BR Manifold absolute pressure sensor Apply positive pressure of 170 kPa (1,275 mmHg, 50.2 in.Hg) 1.6 to 2.3 V
IREL (E7-10) - E1 (E5-7) B-W - BR EDU relay Ignition switch OFF 11 to14 V
IREL (E7-10) - E1 (E5-7) B-W - BR EDU relay Idling 0 to 1.5 V
TACH (E7-4) - E1 (E5-7) B - BR Engine speed Idling Pulse generation
VCS (E5-2) - E2S (E5-1) L - L-B Common rail pressure sensor Ignition switch ON 4.5 to 5.5 V
PCR1 (E6-26) - E2 (E6-28) W-R - BR Common rail pressure sensor (main) Idling 1.8 to 2.1 V
PCR2 (E6-33) - E2 (E6-28) R - BR Common rail pressure sensor (sub) Idling 1.2 to 1.5 V
GREL (E7-15) - E1 (E5-7) R-L - BR GLOW relay Cranking 11 to14 V
GREL (E7-15) - E1 (E5-7) R-L - BR GLOW relay Idling 0 to 1.5 V
THF (E6-29) - E2 (E6-28) Y-G - BR Fuel temperature sensor Ignition switch ON 0.5 to 3.4 V
ALT (E6-8) - E1 (E5-7) L - BR Generator (Alternator) duty ratio Idling Pulse generation
PCV+ (E6-2) - PCV- (E6-1) LG - GR Suction control valve Idling

Pulse generation

(see waveform 1)
INJF (E6-25) - E1 (E5-7) B-Y - BR EDU Idling

Pulse generation

(see waveform 3)
VNTO (E6-10) - E1 (E5-7) L-R - BR Turbo motor driver Idling

Pulse generation

(see waveform 6)
VNTI (E6-17) - E1 (E5-7) Y-B - BR Turbo motor driver Idling

Pulse generation

(see waveform 7)
VLU (E5-29) - E2 (E6-28) Y - BR Throttle position sensor

Ignition switch ON, throttle valve

fully opened

 3.6 to 4.2 V
VLU (E5-29) - E2 (E6-28) Y - BR Throttle position sensor

Ignition switch ON, throttle valve

fully closed

 0.4 to 1.0 V
LUSL (E5-4) - E1 (E5-7) L-Y - BR Diesel throttle duty signal Engine warmed up, racing engine

Pulse generation

(see waveform 8)
EGLS (E5-33) - E2 (6-28) W - BR EGR valve position sensor Ignition switch ON 0.6 to 1.4 V
EGR (E5-9) - E1 (E5-7) G-W - BR EGR E-VRV Ignition switch ON

Pulse generation

(see waveform 5)
EGRC (E5-18) - E1 (E5-7) P-L - BR EGR cut VSV Ignition switch ON, EGR cuts (accelerator pedal fully depressed) 0 to 3 V
SCV (E6-15) - E01 (E6-7) G - BR Swirl control valve Idling 0 to 1.5 V
Engine speed 2600 rpm or more 11 to 14 V
CANL (E8-23) - E1 (E5-7) W - BR CAN communication line Ignition switch ON

Pulse generation

(see waveform 10)
CANH (E8-24) - E1 (E5-7) B - BR CAN communication line Ignition switch ON

Pulse generation

(see waveform 11)

  1. WAVEFORM 1

    A01KGYKE03
    Suction control valve signal
    Item Content
    Symbols (Terminal No.) PCV+ (E6-2) - PCV- (E6-1)
    Tool Setting 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

    A01KG2BE03
    Injector No. 1 (to No. 4) injection signal
    Item Content
    Symbols (Terminal No.)

    (a) #1 (E6-24) - E1 (E5-7)

    (b) #2 (E6-23) - E1 (E5-7)

    (c) #3 (E6-22) - E1 (E5-7)

    (d) #4 (E6-21) - E1 (E5-7)
    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

    A01KGVOE03
    Injector injection confirmation signal
    Item Content
    Symbols (Terminal No.) INJF (E6-25) - E1 (E5-7)
    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

    A01KH0ME03
    Crankshaft position sensor signal and Camshaft position sensor signal
    Item Content
    Symbols (Terminal No.)

    (a) NE+ (E6-27) - NE- (E6-34)

    (b) G+ (E5-23) - G- (E5-31)
    Tool Setting 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the engine speed.

  5. WAVEFORM 5

    A01KHE4E03
    EGR E-VRV signal
    Item Content
    Symbols (Terminal No.) EGR (E5-9) - E1 (E5-7)
    Tool Setting 5 V/DIV., 1 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform changes depending on the EGR E-VRV operation.

  6. WAVEFORM 6

    A01KFO1E01
    Turbo motor driver input signal
    Item Content
    Symbols (Terminal No.) VNTO (E6-10) - E1 (E5-7)
    Tool Setting 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the turbocharger operation.

  7. WAVEFORM 7

    A01KH2OE01
    Turbo motor driver output signal
    Item Content
    Symbols (Terminal No.) VNTI (E6-17) - E1 (E5-7)
    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

    A01KF7LE03
    Diesel throttle signal
    Item Content
    Symbols (Terminal No.) LUSL (E5-4) - E1 (E5-7)
    Tool Setting 1 V/DIV., 2 msec./DIV.
    Condition Warm engine with racing engine

    Tech Tips

    The waveform varies depending on the throttle valve operation.

  9. WAVEFORM 9

    A01KFGUE04
    Vehicle speed signal
    Item Content
    Symbols (Terminal No.) SPD (E8-17) - E1 (E5-7)
    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

    A01KGLKE03
    CAN communication signal
    Item Content
    Symbols (Terminal No.) CANL(E8-23) - E1 (E5-7)
    Tool Setting 1 V/DIV., 10 msec./DIV.
    Condition Engine is stopped, ignition switch ON

    Tech Tips

    The wavelength becomes shorter as the CAN communication signal.

  11. WAVEFORM 11

    A01KFMSE03
    CAN communication signal
    Item Content
    Symbols (Terminal No.) CANH (E8-24) - E1 (E5-7)
    Tool Setting 1 V/DIV., 10 msec./DIV.
    Condition Engine is stopped, ignition switch ON

    Tech Tips

    The waveform varies depending on the CAN communication signal.