Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Scion xA AutomaticFACTORY OEM SERVICE PROCEDURE
Terminals Of ECM: Notes
HINT:
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals is also indicated.
The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the STD Voltage column. The illustration above can be used as a reference to identify the ECM terminal locations.
TERMINAL SPECIFICATIONS
| Symbols (Terminals No.) | Wiring Colors | Terminal Descriptions | Conditions | STD Voltages |
|---|---|---|---|---|
| BATT (E6 - 3) - E1 (E4 - 7) | B-Y - BR | Battery (for measuring battery voltage and for ECM memory) | Always | Between 9 V and 14 V |
| FC (E6-10) - E1 (E4-7) | G - BR | Fuel pump control | Ignition switch ON | Between 9 V and 14 V |
| FC (E6 - 10) - E1 (E4-7) | G - BR | Fuel pump control | Idling | Below 1.5 V |
| W (E6 - 11) - E1 (E4 -7) | Y-R - BR | MIL | Idling | Between 9 V and 14 V |
| W (E6-11) - E1 (E4-7) | Y-R - BR | MIL | Ignition switch ON | Below 3.5 V |
| +B (E6-1) - E1 (E4-7) | B-R - BR | Power source of ECM | Ignition switch ON | Between 9 V and 14 V |
| STP (E5 - 19) - E1 (E4-7) | G-W - BR | Stop lamp switch | Ignition switch ON, Brake pedal depressed | Between 9 V and 14 V |
| STP (E5 - 19) - E1 (E4-7) | G-W - BR | Stop lamp switch | Ignition switch ON, Brake pedal released | Below 1.5 V |
| FPS (E6 - 14) - E1 (E4-7) | Y- BR | Airbag sensor | Ignition switch ON | Pulse generation (see WAVEFORM 1 ) |
| STA (E4 - 9) - E1 (E4 - 7) | B-Y - BR | Starter signal | Cranking | 5.5 V or more |
| PSP (E4 - 29) - E1 (E4 - 7) | Y - BR | Power steering oil pressure sensor | Ignition switch ON | Between 9 V and 14 V |
| SPD (E5 - 17) - E1 (E4-7) | V-W - BR | Speed signal from combination meter | Driving at 12 mph (20 km/h) | Pulse generation (see WAVEFORM 2 ) |
| TACH (E6 - 5) - E1 (E4 - 7) | B - BR | Engine speed | Idling | Pulse generation (see WAVEFORM 3 ) |
| VCC (E3-18) - E2 (E3-28) | R-W - BR | Power source of sensor (specific voltage) | Ignition switch ON | Between 4.5 V and 5.5 V |
| PRG (E3-12) - E01 (E3-7) | W-G - BR | VSV for EVAP | Ignition switch ON and engine stopping | Between 9 V and 14 V |
| PRG (E3 - 12) - E01 (E3 -7) | W-G - BR | VSV for EVAP | Idling with warm engine | Pulse generation (see WAVEFORM 4 ) |
| CCV (E5-1) - E1 (E4-7) | L - BR | VSV for CCV | Ignition switch ON | Between 9 V and 14 V |
| PTNK (E6-21) - E2 (E3-28) | B - BR | Vapor pressure sensor | Ignition switch ON | Between 2.9 V and 3.7 V |
| PTNK (E6 -21) - E2 (E3 -28) | B - BR | Vapor pressure sensor | Applying vacuum of 4.0 kPa (30 mmHG, 1.18 in.Hg) | Below 0.5 V |
| VG (E4 - 24) - EVG (E4 - 32) | P - V | Mass air flow meter | Idling, A/C switch OFF | Between 1.1 to 1.5 V |
| OXL1 (E4 - 23) - E2 (E3 - 28) | W - BR | Heated oxygen sensor (Sensor 1) | Engine speed maintained 2,500 rpm for 2 minutes after warming up sensor | Pulse generation (see WAVEFORM 5 ) |
| HTL (E4 - 4) - E03 (E4 - 5) | B-R - BR | Heated oxygen sensor heater (Sensor 1) | Idling | Below 3.0 V |
| HTL (E4 - 4) - E03 (E4 - 5) | B-R - BR | Heated oxygen sensor heater (Sensor 1) | Ignition switch ON | Between 9 to 14 V |
| OXL2 (E4 -21) - E2 (E3 -28) | B - BR | Heated oxygen sensor (Sensor 2) | Engine speed maintained 2,500 rpm for 2 minutes after warming up sensor | Pulse generation (see WAVEFORM 6 ) |
| HTL2 (E5 - 4) - E03 (E4 - 5) | W - BR | Heated oxygen sensor heater (Sensor 2) | Idling | Below 3.0 V |
| HTL2 (E5 - 4) - E03 (E4 - 5) | W - BR | Heated oxygen sensor heater (Sensor 2) | Ignition switch ON | Between 9 to 14 V |
| THW (E3 - 19) - E2 (E3-28) | R-L - BR | Engine coolant temperature sensor | Idling, Engine coolant temperature 80°C (176°F) | Between 0.2 to 1.0 V |
| G2+ (E3 - 26) - NE- (E3 - 34) | B - W | Camshaft position sensor | Idling | Pulse generation (see WAVEFORM 7 ) |
| NE+ (E3 - 27) - NE- (E3 - 34) | O-W | Crankshaft position sensor | Idling | Pulse generation (see WAVEFORM 7 ) |
| THA (E3 - 20) - E2 (E3 - 28) | Y-B - BR | Intake air temperature sensor | Idling, Intake air temperature 20°C (68° F) | Between 0.5 to 3.4 V |
| VTA (E3 -21) - E2 (E3 -28) | Y-R - BR | Throttle position sensor | Ignition switch ON, Throttle valve fully closed | Between 0.3 to 1.0 V |
| VTA (E3 -21) - E2 (E3 -28) | Y-R - BR | Throttle position sensor | Ignition switch ON, Throttle valve fully open | Between 3.2 to 4.9 V |
| #1 (E3 - 1) - E01 (E3 -7) #2 (E3 - 2) - E01 (E3 - 7) #3 (E3 - 3) - E01 (E3 - 7) #4 (E3 - 4) - E01 (E3 - 7) |
B-O - BR B-Y - BR B-W - BR B-L - BR |
Injector | Ignition switch ON | Between 9 to 14 V |
| #1 (E3 - 1) - E01 (E3 -7) #2 (E3 - 2) - E01 (E3 - 7) #3 (E3 - 3) - E01 (E3 - 7) #4 (E3 - 4) - E01 (E3 - 7) |
B-O - BR B-Y - BR B-W - BR B-L - BR |
Injector | Idling | Pulse generation (see WAVEFORM 8 ) |
| IGT1 (E3 - 8) - E1 (E4 - 7) IGT2 (E3 - 9) - E1 (E4 - 7) IGT3 (E3 - 10) - E1 (E4-7) IGT4 (E3 - 11) - E1 (E4 -7) |
G-R - BR G-B - BR G-O - BR G-Y - BR |
Ignition coil and igniter (ignition signal) | Idling | Pulse generation (see WAVEFORM 9 ) |
| IGF1 (E3 - 23) - E1 (E4 - 7) | Y - BR | Ignition coil and igniter (ignition confirmation signal) | Ignition switch ON | Between 4.5 to 5.5 V |
| IGF1 (E3 - 23) - E1 (E4 - 7) | Y - BR | Ignition coil and igniter (ignition confirmation signal) | Idling | Pulse generation (see WAVEFORM 9 ) |
| RSD (E3 - 5) - E01 (E3 - 7) | B-R - BR | Idle air control valve | Ignition switch ON | Between 9 to 14 V |
| OCV+ (E3 - 15) - OCV- (E3 - 14) | R-Y - R-B | Camshaft timing oil control valve | Ignition switch ON | Pulse generation (see WAVEFORM 10 ) |
| KNKL (E4 - 1) - E1 (E4 - 7) | W - BR | Knock sensor | Idling | Pulse generation (see WAVEFORM 11 ) |
| TC (E6 - 20) - E1 (E4 - 7) | P-B - BR | Terminal TC of DLC 3 | Ignition switch ON | Between 9 to 14 V |
| SIL (E6 - 18) - E1 (E4-7) | LG-B - BR | Terminal SIL of DLC3 | Connect hand-held tester or OBD II scan tool to DLC3 | Pulse generation (see WAVEFORM 12 ) |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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