ECD SYSTEM(w/ Urea SCR System) TERMINALS OF ECM
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 "Terminal No. (Symbol)" 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.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| G86-1 (BATT) - C60-1 (E1) | Y - W-B | Battery (for measuring the battery voltage and for the ECM memory) | Always | 11 to 14 V |
| G86-18 (IGSW) - C60-1 (E1) | GR - W-B | Ignition switch | Ignition switch ON | 11 to 14 V |
| G86-2 (+B) - C60-1 (E1) | L - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| G86-3 (+B2) - C60-1 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| G86-4 (+B3) - C60-1 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| G85-14 (MREL) - C60-1 (E1) | W - W-B | EFI-MAIN NO. 1 relay operation signal | Ignition switch ON | 11 to 14 V |
| 10 seconds elapsed after ignition switch off | 0 to 1.5 V | |||
| C59-5 (+BD1) - C60-1 (E1) | B - W-B | EDU relay operation signal | Ignition switch ON | 11 to 14 V |
| C59-4 (+BD2) - C60-1 (E1) | B - W-B | EDU relay operation signal | Ignition switch ON | 11 to 14 V |
| G85-15 (GREL) - C60-1 (E1) | LG - W-B | GLOW relay | Cranking | 11 to 14 V |
| Idling (10 seconds or more after engine start) | 0 to 1.5 V | |||
| G85-11 (NSW) - C60-1 (E1) | L - W-B | Park/neutral position switch assembly signal | Ignition switch ON, shift lever not in P or N | 11 to 14 V |
| Ignition switch ON, shift lever in P or N | Below 1.0 V | |||
| Clutch start switch signal | Ignition switch ON, clutch pedal fully depressed | Below 1.0 V | ||
| Ignition switch ON, clutch pedal released | 11 to 14 V | |||
| G86-29 (VCPA) - G86-22 (EPA) | LG - G | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| G86-30 (VCP2) - G86-25 (EPA2) | R - Y | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| G86-28 (VPA) - G86-22 (EPA) | W - G | Accelerator pedal position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.5 to 1.1 V |
| Accelerator pedal position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully depressed | 3.0 to 4.6 V | ||
| G86-31 (VPA2) - G86-25 (EPA2) | GR - Y | Accelerator pedal position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully released | 0.9 to 2.3 V |
| Accelerator pedal position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully depressed | 3.4 to 5.0 V | ||
| C58-25 (VCVG) - C58-24 (EVG) | L - Y | Power source of mass air flow meter sub-assembly (for VG) | Ignition switch ON | 4.8 to 5.2 V |
| C58-33 (VG) - C58-24 (EVG) | W - Y | Mass air flow meter sub-assembly signal | Ignition switch ON | Pulse generation (See waveform 1) |
| C58-32 (THA) - C58-24 (EVG) | B - Y | Intake air temperature sensor (built into mass air flow meter sub-assembly) | Idling, intake air temperature at 20°C (68°F) | 0.5 to 3.4 V |
| C58-35 (THIA) - C58-27 (ETHI) | G - BR | Intake air temperature sensor (turbo) | Idling, intake air temperature at 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| C57-34 (THW) - C57-27 (ETHW) | B - BR | Engine coolant temperature sensor | Idling, engine coolant temperature at 80°C (176°F) | 0.2 to 1.0 V |
| G85-22 (STA) - C60-1 (E1) | GR - W-B | Starter signal | Cranking | 6.0 V or higher |
| C57-6 (#1D+) - C57-7 (#1D-) | W - B | No. 1 injector assembly signal | Idling | Pulse generation (See waveform 2) |
| C57-1 (#2D+) - C57-2 (#2D-) | R - W | No. 2 injector assembly signal | ||
| C58-7 (#3D+) - C58-6 (#3D-) | G - R | No. 3 injector assembly signal | ||
| C57-5 (#4D+) - C57-4 (#4D-) | Y - L | No. 4 injector assembly signal | ||
| C60-17 (VCG) - C60-18 (G2-) | B - W | Power source of camshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C60-27 (G2+) - C60-18 (G2-) | R - W | Camshaft position sensor signal | Idling | Pulse generation (See waveform 3) |
| C60-20 (VCNE) - C60-19 (NE-) | W - R | Power source of crankshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C60-28 (NE+) - C60-19 (NE-) | Y - R | Crankshaft position sensor signal | Idling | Pulse generation (See waveform 4) |
| G86-13 (STP) - C60-1 (E1) | L - W-B | Stop light switch assembly signal | Ignition switch ON, brake pedal depressed | 7.5 to 14 V |
| Ignition switch ON, brake pedal released | 0 to 1.5 V | |||
| G86-12 (ST1-) - C60-1 (E1) | GR - W-B | Stop light switch assembly signal (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 | |||
| G85-25 (TC) - C60-1 (E1) | R - W-B | Terminal TC of DLC3 | Ignition switch ON | 11 to 14 V |
| G85-10 (SPD) - C60-1 (E1) | V - W-B | Speed signal from combination meter assembly | Ignition switch ON, slowly wheel rotated | Pulse generation (See waveform 5) |
| C57-28 (VCPM) - C57-19 (EPIM) | R - BR | Power source of manifold absolute pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C57-18 (PIM) - C57-19 (EPIM) | 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 1.5 V | |||
| Positive pressure of 170 kPa (1275 mmHg, 50.2 in.Hg) applied | 1.6 to 2.3 V | |||
| G85-16 (TACH) - C60-1 (E1) | V - W-B | Engine speed | Idling | Pulse generation (See waveform 6) |
| C59-28 (VCM) - C59-19 (E2M) | G - R | Power source of fuel pressure sensor (for PCR1) | Ignition switch ON | 4.5 to 5.5 V |
| C59-18 (PCR1) - C59-19 (E2M) | W - R | Fuel pressure sensor signal (main) | Idling | 1.8 to 2.1 V |
| C60-33 (VCS) - C60-25 (E2S) | B - P | Power source of fuel pressure sensor (for PCR2) | Ignition switch ON | 4.5 to 5.5 V |
| C60-26 (PCR2) - C60-25 (E2S) | R - P | Fuel pressure sensor signal (sub) | Idling | 1.2 to 1.5 V |
| C58-3 (PCV+) - C58-4 (PCV-) | G - R | Pre-stroke control valve operation signal | Idling | Pulse generation (See waveform 7) |
| C58-2 (PRV+) - C58-1 (PRV-) | B - Y | Pressure discharge valve signal | Ignition switch turned off after idling | Pulse generation |
| C59-1 (VNM+) - C60-1 (E1) | G - W-B | Variable vane DC motor signal (turbocharger nozzle vane control actuator) | Idling | Pulse generation |
| C59-2 (VNM-) - C60-1 (E1) | W - W-B | Variable vane DC motor signal (turbocharger nozzle vane control actuator) | Idling | Pulse generation |
| C59-30 (VNVC) - C59-22 (VNE2) | R - W | Power source of nozzle vane position sensor (turbocharger nozzle vane control actuator) | Ignition switch ON | 4.5 to 5.5 V |
| C59-23 (VNA) - C59-22 (VNE2) | P - W | Nozzle vane position sensor signal (turbocharger nozzle vane control actuator) | Ignition switch ON | 2.3 to 2.7 V |
| C59-29 (VCVL) - C59-20 (EVLU) | Y - L | Power source of throttle position sensor | Ignition switch ON | 4.5 to 5.5 V |
| C59-21 (VLU) - C59-20 (EVLU) | W- L | Throttle position sensor signal | 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 | |||
| C60-6 (M+) - C60-3 (ME01) | G - W-B | Diesel throttle duty signal | Engine warmed up, racing engine | Pulse generation |
| C60-5 (M-) - C60-3 (ME01) | R - W-B | Diesel throttle duty signal | Engine warmed up, racing engine | Pulse generation |
| C59-31 (VCEG) - C59-24 (EEGL) | R - W | Power source of EGR valve position sensor | Ignition switch ON | 4.5 to 5.5 V |
| C59-25 (EGLS) - C59-24 (EEGL) | G - W | EGR valve position sensor | Ignition switch ON | 0.6 to 1.4 V |
| C59-6 (EGM+) - C60-1 (E1) | B - W-B | EGR valve duty signal | Engine warmed up, idling | Pulse generation |
| C59-7 (EGM-) - C60-1 (E1) | W - W-B | EGR valve duty signal | Engine warmed up, idling | Pulse generation |
| C57-16 (ECBV) - C60-1 (E1) | L - W-B | Vacuum switching valve assembly (for EGR Bypass Valve) | Vacuum switching valve assembly (for EGR Bypass Valve) on | 0 to 1.5 V |
| Vacuum switching valve assembly (for EGR Bypass Valve) off | 11 to 14 V | |||
| G85-6 (FIV) - C60-1 (E1) | P - W-B | Exhaust fuel addition injector assembly signal | Exhaust fuel addition injector operating | Pulse generation |
| C59-32 (VCPX) - C59-26 (EPEX) | R - BR | Power source for differential pressure sensor | Ignition switch ON | 4.5 to 5.5 V |
| C59-27 (PEX) - C59-26 (EPEX) | L - BR | Differential pressure sensor | Ignition switch ON | 0.4 to 4.8 V |
| C60-31 (A1A+) - C60-1 (E1) | B - W-B | Air fuel ratio sensor | Ignition switch ON | 2.0 to 2.5 V |
| C60-32 (A1A-) - C60-1 (E1) | W - W-B | Air fuel ratio sensor | Ignition switch ON | 2.0 to 2.5 V |
| G85-5 (HA1A) - C60-2 (E04) | Y - W-B | Air fuel ratio sensor heater | Ignition switch ON | 11 to 14 V |
| Idling before air fuel ratio sensor warmed | Pulse generation (See waveform 8) |
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| C57-23 (THTO) - C57-22 (ETTO) | G - W | Exhaust gas temperature sensor | Engine warmed up, idling | 0.2 to 4.95 V |
| C57-25 (THCI) - C57-24 (ETCI) | L - P | No. 2 exhaust gas temperature sensor | Engine warmed up, idling | 0.2 to 4.95 V |
| C57-33 (THCO) - C57-26 (ETCO) | B - R | No. 3 exhaust gas temperature sensor | Engine warmed up, idling | 0.2 to 4.95 V |
| G85-26 (THSO) - G85-33 (ETSO) | LG - Y | No. 4 exhaust gas temperature sensor | Engine warmed up, idling | 0.2 to 4.95 V |
| G85-23 (NEO) - C60-1 (E1) | G - W-B | Crankshaft position sensor signal sent to certification ECU (smart key ECU assembly) | Engine warmed up, idling | Pulse generation (See waveform 9) |
| G86-15 (AC1) - C59-3 (E01) | GR - W-B | A/C signal | A/C switch on | 0 to 1.5 V |
| A/C switch off | 11 to 14 V | |||
| G86-14 (ACT) - C59-3 (E01) | LG - W-B | A/C signal | Ignition switch ON | 11 to 14 V |
| A/C cut control on | 0 to 3 V | |||
| G85-28 (CANL) - C60-1 (E1) | W - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 10) |
| G85-17 (CANH) - C60-1 (E1) | B - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 11) |
| G85-35 (CAND) - C60-1 (E1) | W - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 10) |
| G85-27 (CANU) - C60-1 (E1) | B - W-B | CAN communication line | Ignition switch ON | Pulse generation (See waveform 11) |
| C60-7 (LIN) - C60-1 (E1) | P - W-B | LIN communication line | Ignition switch ON | Pulse generation (See waveform 12) |
| C59-3 (E01) - Body ground | W-B - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
| C60-4 (E02) - Body ground | W-B - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
| C60-1 (E1) - Body ground | W-B - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
| C60-3 (ME01) - Body ground | W-B - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
| G86-8 (EC) - Body ground | BR - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
| C57-3 (E1D1) - Body ground | W-B - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
| C58-5 (E1D2) - Body ground | W-B - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
| C60-2 (E04) - Body ground | W-B - Body ground | Ground circuit of ECM | Always | Below 1 Ω |
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WAVEFORM 1
*a 1 V/DIV. *b 100 μsec./DIV. Mass Air Flow Meter Sub-assembly Signal ECM Terminal Name Between VG and EVG Tester Range 1 V/DIV., 100 μsec./DIV. Condition Ignition switch ON -
WAVEFORM 2
*a 10 V/DIV. *b 1 msec./DIV. No. 1 (to No. 4) Injector Assembly Signal ECM Terminal Name Between #1D+ and #1D-
Between #2D+ and #2D-
Between #3D+ and #3D-
Between #4D+ and #4D-
Tester Range 10 V/DIV., 1 msec./DIV. Condition Idling after engine warmed Tech Tips
The waveform varies depending on the injector injection.
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WAVEFORM 3
*a 5 V/DIV. *b 20 msec./DIV. Camshaft Position Sensor Signal ECM Terminal Name Between G2+ and G2- Tester Range 5 V/DIV., 20 msec./DIV. Condition Idling after engine warmed Tech Tips
The waveform varies depending on the engine speed.
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WAVEFORM 4
*a 2 V/DIV. *b 10 msec./DIV. Crankshaft Position Sensor Signal ECM Terminal Name Between NE+ and NE- Tester Range 2 V/DIV., 10 msec./DIV. Condition Idling after engine warmed Tech Tips
The waveform becomes shorter as the engine speed.
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WAVEFORM 5
*a 5 V/DIV. *b 10 msec./DIV. 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.
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WAVEFORM 6
*a 5 V/DIV. *b 10 msec./DIV. Engine Speed Signal ECM Terminal Name Between TACH and E1 Tester Range 5 V/DIV., 10 msec./DIV. Condition Idling after engine warmed Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 7
*1 10 V/DIV. *2 20 msec./DIV. Pre-stroke Control Valve Signal ECM Terminal Name Between PCV+ and PCV- Tester Range 10 V/DIV., 20 msec./DIV. Condition Idling after engine warmed Tech Tips
The waveform varies depending on pre-stroke control valve operation.
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WAVEFORM 8
*a 2 V/DIV. *b 20 msec./DIV. Air Fuel Ratio Sensor Heater Signal ECM Terminal Name Between HA1A and E04 Tester Range 2 V/DIV., 20 msec./DIV. Condition Idling before air fuel ratio sensor warmed -
WAVEFORM 9
*a 1 V/DIV. *b 2 msec./DIV. Engine Speed Signal ECM Terminal Name Between NEO and E1 Tester Range 1 V/DIV., 2 msec./DIV. Condition Idling after engine warmed -
WAVEFORM 10
*a 1 V/DIV. *b 10 msec./DIV. CAN Communication Signal ECM Terminal Name Between CANL and E1
Between CAND 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.
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WAVEFORM 11
*a 1 V/DIV. *b 10 msec./DIV. CAN Communication Signal ECM Terminal Name Between CANH and E1
Between CANU 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.
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WAVEFORM 12
*a 2 V/DIV. *b 10 msec./DIV. LIN Communication Signal ECM Terminal Name Between LIN and E1 Tester Range 2 V/DIV., 10 msec./DIV. Condition Engine stopped, ignition switch ON Tech Tips
The waveform varies depending on the LIN communication signal.