ECD 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". Lock under "Terminal No. (Symbols)" 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. (Symbols) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| E24-2 (BATT) - E23-7 (E1) | L-O - BR | Battery (for measuring battery voltage and for ECM memory) | Constant | 18 to 27 V |
| E25-16 (IGSW) - E23-7 (E1) | GR - BR | Ignition switch | Ignition switch in the ON position | 18 to 27 V |
| E25-1 (+B) - E23-7 (E1) | B-R - BR | Power source of ECM | Ignition switch in the ON position | 18 to 27 V |
| E25-13 (MREL) - E23-7 (E1) | GR-G - BR | MAIN relay | Ignition switch in the ON position | 18 to 27 V |
| E25-13 (MREL) - E23-7 (E1) | GR-G - BR | MAIN relay | 5 seconds pass after ignition switch off | 0 to 2 V |
| E22-18 (VC) - E23-7 (E1) | L-R - BR | Power source of sensor (a specific voltage) | Ignition switch in the ON position | 4.5 to 5.5 V |
| E25-22 (VPA) - E25-28 (EPA) | BR-R - LG-B | Accelerator pedal position sensor (for engine control) | Ignition switch in the ON position, accelerator pedal fully released | 0.6 to 1.0 V |
| E25-22 (VPA) - E25-28 (EPA) | BR-R - LG-B | Accelerator pedal position sensor (for engine control) | Ignition switch in the ON position, accelerator pedal fully depressed | 2.8 to 3.6 V |
| E25-23 (VPA2) - E25-29 (EPA2) | R-W - GR-G | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch in the ON position, accelerator pedal fully released | 1.4 to 1.8 V |
| E25-23 (VPA2) - E25-29 (EPA2) | R-W - GR-G | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch in the ON position, accelerator pedal fully depressed | 3.6 to 4.4 V |
| E25-20 (VCPA) - E25-28 (EPA) | B-O - LG-B | Power source of accelerator pedal position sensor (for VPA) | Ignition switch in the ON position | 4.5 to 5.5 V |
| E25-21 (VCP2) - E25-29 (EPA2) | G-W - GR-G | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch in the ON position | 4.5 to 5.5 V |
| E23-24 (VG) - E23-32 (EVG) | G - V-R | MAF meter | Engine is warmed up: Idling | 1.8 to 2.6 V |
| E22-31 (THA) - E22-28 (E2) | V-G - R-Y | IAT sensor (built in MAF meter) | Engine is warmed up: Idling, IAT at 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| E22-20 (THIA) - E22-28 (E2) | Y-R - R-Y | IAT sensor (after turbocharged) | Engine is warmed up: Idling, IAT at 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| E22-19 (THW) - E22-28 (E2) | G-R - R-Y | ECT sensor | Idling, ECT at 80 to 120°C (176 to 248°F) | 0.4 to 1.0 V |
| E23-18 (STA) - E23-7 (E1) | B-W - BR | Starter signal | Cranking | 6.0 V or more |
| E22-24 (#1) - E23-7 (E1) E22-23 (#2) - E23-7 (E1) E22-22 (#3) - E23-7 (E1) E22-21 (#4) - E23-7 (E1) |
P-L - BR LG - BR LG-B - BR GR - BR |
Injector | Engine is warmed up: Idling | Pulse generation Click here |
| E23-23 (G+) - E23-31 (G-) | R - G | Camshaft position sensor | Engine is warmed up: Idling | Pulse generation Click here |
| E22-27 (NE+) - E22-34 (NE-) | B - W | Crankshaft position sensor | Engine is warmed up: Idling | Pulse generation Click here |
| E25-18 (STP) - E23-7 (E1) | V - BR | Stop light switch | Ignition switch in the ON position, brake pedal depressed | 18 to 27 V |
| E25-18 (STP) - E23-7 (E1) | V - BR | Stop light switch | Ignition switch in the ON position, brake pedal released | 0 to 2 V |
| E25-8 (ST1-) - E23-7 (E1) | V-Y - BR | Stop light switch (opposite to STP) | Brake pedal depressed | 0 to 2 V |
| E25-8 (ST1-) - E23-7 (E1) | V-Y - BR | Stop light switch (opposite to STP) | Brake pedal released | 18 to 27 V |
| E25-17 (TC) - E23-7 (E1) | R-L - BR | Terminal TC of DLC3 | Ignition switch in the ON position | 18 to 27 V |
| E23-18 (STA) - E23-7 (E1) | B-W - BR | Starter signal | Cranking | 18 to 27 V |
| E25-6 (TAC) - E23-7 (E1) | P - BR | Engine speed | Idling | Pulse generation |
| E25-9 (W) - E23-7 (E1) | Y-R - BR | MIL | MIL illuminated | 0 to 2 V |
| E25-9 (W) - E23-7 (E1) | Y-R - BR | MIL | MIL not illuminated | 18 to 27 V |
| E25-19 (SPD) - E23-7 (E1) | R - BR | Speed signal from combination meter | Ignition switch in the ON position, driving wheel slowly rotated | Pulse generation Click here |
| E23-28 (PIM) - E22-28 (E2) | P-G - R-Y | Turbo pressure sensor (manifold absolute pressure sensor) | Applied negative pressure of 93 kPa (697 mmHg, 27.5 in.Hg) | 0.25 to 0.4 V |
| E23-28 (PIM) - E22-28 (E2) | P-G - R-Y | Turbo pressure sensor (manifold absolute pressure sensor) | Applied positive pressure of 150 kPa (1,128 mmHg, 44.2 in.Hg) | 1.0 to 1.4 V |
| E23-21 (VNTO) - E23-7 (E1) | R - BR | Turbocharger operation | Idling | Pulse generation |
| E23-29 (VNTI) - E23-7 (E1) | G - BR | Turbocharger status | Idling | Pulse generation |
| E25-14 (IREL) - E23-7 (E1) | R - BR | EDU relay | Ignition switch off | 18 to 27 V |
| E25-14 (IREL) - E23-7 (E1) | R - BR | EDU relay | Idling | 0 to 2 V |
| E22-26 (PCR1) - E22-28 (E2) | L-W - R-Y | Fuel pressure sensor | Idling (Approximately 30 MPa (306 kgf/cm2, 4,351 psi)) |
1.7 to 2.2 V |
| E22-33 (PCR2) - E22-28 (E2) | L-B - R-Y | Fuel pressure sensor | Idling (Approximately 30 MPa (306 kgf/cm2, 4,351 psi)) |
1.2 to 1.6 V |
| E22-29 (THF) - E22-28 (E2) | Y - R-Y | Fuel temperature sensor | Ignition switch in the ON position | 1.2 to 1.6 V |
| E23-22 (VCG) - E23-31 (G-) | L-R - G | Camshaft position sensor | Ignition switch in the ON position | 4.5 to 5.5 V |
| E22-2 (PCV+) - E22-1 (PCV-) | L - L-Y | Suction control valve | Idling | Pulse generation Click here |
| E23-33 (EGLS) - E22-28 (E2) | G-Y - R-Y | EGR position sensor | Ignition switch in the ON position | 3.8 to 4.2 V |
| E23-33 (EGLS) - E22-28 (E2) | G-Y - R-Y | EGR position sensor | Engine is warmed up, Idling | 2.5 to 2.7 V |
| E23-3 (EGRS) - E23-7 (E1) | G - BR | EGR valve | Ignition switch in the ON position | 0 to 2 V |
| E23-3 (EGRS) - E23-7 (E1) | G - BR | EGR valve | Engine is warmed up, Engine speed 1500 rpm | Pulse generation |
| E22-25 (INJF) - E23-7 (E1) | B - BR | EDU | Idling | Pulse generation Click here |
| E23-20 (VLU) - E22-28 (E2) | Y-B - R-Y | Throttle position sensor | Accelerator pedal depressed | 0.5 to 0.8 V |
| E23-20 (VLU) - E22-28 (E2) | Y-B - R-Y | Throttle position sensor | Accelerator pedal released | 2.5 to 3.0 V |
| E23-4 (LUSL) - E23-7 (E1) | W - BR | Throttle control motor duty signal | Accelerator pedal released → Accelerator pedal depressed (when throttle motor is operating) | Pulse generation |
| E23-1 (THCO) - E22-28 (E2) | W-L - R-Y | Exhaust gas temperature sensor | Engine is warmed up, Idling | 4.5 to 4.9 V |
| E23-2 (THCI) - E22-28 (E2) | R-B - R-Y | Exhaust gas temperature sensor | Engine is warmed up, Idling | 4.5 to 4.9 V |
| E23-27 (PEX) - E22-28 (E2) | P-L - R-Y | Differential pressure sensor | Engine is warmed up, Idling | 0.5 to 1.0 V |
| E24-15 (RGSW) - E23-7 (E1) | P-L - BR | DPF switch signal | DPF switch on | 18 to 27 V |
| E24-15 (RGSW) - E23-7 (E1) | P-L - BR | DPF switch signal | DPF switch off | 0 to 2 V |
| E23-8 (EXB) - E23-7 (E1) | P-L - BR | Exhaust brake | Exhaust brake operating | 18 to 27 V |
| E25-10 (W2) - E23-7 (E1) | B - BR | DPF indicator | DPF indicator on (ignition switch in the ON position) | 0 to 2 V |
| E25-10 (W2) - E23-7 (E1) | B - BR | DPF indicator | DPF indicator off (idling) | 18 to 27 V |
| E23-16 (PMB) - E23-7 (E1) | B - BR | DPF warning buzzer | Buzzer off | 18 to 27 V |
| E23-16 (PMB) - E23-7 (E1) | B - BR | DPF warning buzzer | Buzzer on | 0 to 2 V |
| E24-16 (NUSW) - E23-7 (E1) | B-W - BR | Neutral position switch | Ignition switch in the ON position, shift position is neutral | 18 to 27 V |
| E24-16 (NUSW) - E23-7 (E1) | B-W - BR | Neutral position switch | Ignition switch in the ON position, shift position is not neutral | 0 to 2 V |
| E24-9 (CLSW) - E23-7 (E1) | O - BR | Exhaust brake clutch switch | Clutch pedal depressed | 0 to 2 V |
| E24-9 (CLSW) - E23-7 (E1) | O - BR | Exhaust brake clutch switch | Clutch pedal released | 18 to 27 V |
| E24-13 (EXSW) - E23-7 (E1) | L - BR | Combination switch | Exhaust brake switch on | 18 to 27 V |
| E24-13 (EXSW) - E23-7 (E1) | L - BR | Combination switch | Exhaust brake switch off | 0 to 2 V |
| E24-11 (HSW) - E23-7 (E1) | BR-W - BR | Warm up switch | Warm up switch on | 18 to 27 V |
| E24-11 (HSW) - E23-7 (E1) | BR-W - BR | Warm up switch | Warm up switch off | 0 to 2 V |
| E24-17 (CANH) - E23-7 (E1) | W - BR | CAN communication line | Ignition switch in the ON position | Pulse generation |
| E24-28 (CANL) - E23-7 (E1) | B - BR | CAN communication line | Ignition switch in the ON position | Pulse generation |
| E23-7 (E1) - Body ground | BR - - | Ground | Always | Below 1 Ω |
| E22-28 (E2) - Body ground | R-Y - - | Ground | Always | Below 1 Ω |
| E22-7 (E01) - Body ground | BR - - | Ground | Always | Below 1 Ω |
| E22-6 (E02) - Body ground | BR - - | Ground | Always | Below 1 Ω |
| E23-19 (EC) - Body ground | BR - - | Ground | Always | Below 1 Ω |