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.
2004 Scion xA AutomaticFACTORY OEM SERVICE PROCEDURE
Terminals Of ECM
TERMINALS SPECIFICATIONS
| Symbols (Terminals No.) | Wiring Color | Terminal Description | Condition | STD Voltage (V) |
|---|---|---|---|---|
| BATT (E6 - 3) - E1 (E4 - 7) | B-Y - BR | Battery (For Measuring The Battery Voltage And For The ECM Memory) | Always | 8 to 14 |
| FC (E6 - 10) - E1 (E4 - 7) | G - BR | Fuel Pump Control | IG Switch ON | 8 to 14 |
| Idling | Below 3.5 | |||
| W (E6 - 11) - E1 (E4 - 7) | Y-R - BR | MIL | Idling | 8 to 14 |
| IG Switch ON | Below 3.5 | |||
| +B (E6 - 1) - E1 (E4 - 7) | B-R - BR | Power Source Of ECM | IG Switch ON | 8 to 14 |
| STP (E5 - 19) - E1 (E4 - 7) | G-W - BR | Stop Light Switch | Brake Pedal Depressed | 8 To 14 |
| Brake Pedal Released | Below 1.5 | |||
| F/PS (E6 - 14) - E1 (E4 - 7) | Y - BR | Airbag Sensor | IG Switch ON | Pulse Generation |
| STA (E4 - 9) - E1 (E4 - 7) | B-Y - BR | Starter Signal | Cranking | 5.5 or more |
| PSP (E4 - 29) - E1 (E4 - 7) | Y - BR | Power steering oil pressure sensor | IG switch ON | 8 to 14 |
| SPD (E5 - 17) - E1 (E4 - 7) | V-W - BR | Speed signal from combination meter | IG switch ON, rotate driving wheel slowly | Pulse generation (See DTC P0500 VEHICLE SPEED SENSOR "A" ) |
| TACH (E6 - 5) - E1 (E4 - 7) | B - BR | Engine speed | Idling | Pulse Generation |
| VC (E3 - 18) - E2 (E3 - 28) | R-W - BR | Power Source Of Sensor (A Specific Voltage) | IG Switch ON | 4.5 to 5.5 |
| PRG (E3 - 12) - E01 (E3 - 7) | W-G - BR | VSV for EVAP | IG Switch ON | 8 to 14 |
| CCV (E5 - 1) - E1 (E4 - 7) | L - BR | VSV for CCV | IG switch ON | 9 to 14 |
| PTNK (E6 - 21) - E2 (E3 - 28) | B - BR | Vapor Pressure Sensor | Ignition Switch ON | 2.9 to 3.7 |
| Apply Vacuum 4.0 kPa (30 mmHG, 1.18 in.Hg) | Below 0.5 | |||
| VG (E4 - 24) - EVG (E4 - 32) | P - V | Mass Air Flow Sensor | Idling, A/C Switch OFF | 1.1 to 1.5 |
| OXL1 (E4 - 23) - E2 (E3 - 28) | W - BR | Heated Oxygen Sensor (Bank1, Sensor1) | Maintain Engine Speed At 2,500 RPM For 2 Min. After Warning Up | Pulse generation (See DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1) ) |
| HTL (E4 - 4) - E03 (E4 - 5) | B-R - BR | Heated Oxygen Sensor Heater (Bank1, Sensor1) | Idling | Below 3.0 |
| IG Switch ON | 9 to 14 | |||
| OXL2 (E4 - 21) - E2 (E3 - 28) | B - BR | Heated Oxygen Sensor (Bank1, Sensor2) | Maintain Engine Speed At 2,500 RPM For 2 Min. After Warning Up | Pulse generation (See DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1) ) |
| HTL2 (E5 - 4) - E03 (E4 - 5) | W - BR | Heated Oxygen Sensor Heater (Bank1, Sensor2) | Idling | Below 3.0 |
| IG Switch ON | 9 to 14 | |||
| THW (E3 - 19) - E2 (E3 - 28) | R-L - BR | Engine Coolant Temperature Sensor | Idling, Engine Coolant Temp. at 80°C (176°F) | 0.2 to 1.0 |
| G2 (E3 - 26) - NE- (E3 - 34) | B - W | Camshaft Position Sensor | Idling | Pulse generation (See DTC P0340 CAMSHAFT POSITION SENSOR "A" CIRCUIT (BANK 1 OR SINGLE SENSOR), DTC P0341 CAMSHAFT POSITION SENSOR "A" CIRCUIT RANGE/PERFORMANCE (BANK 1 OR SINGLE SENSOR) ) |
| NE (E3 - 27) - NE- (E3 - 34) | O - W | Crankshaft Position Sensor | Idling | Pulse generation (See DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT, DTC P0339 CRANKSHAFT POSITION SENSOR "A" CIRCUIT INTERMITTENT ) |
| THA (E3 - 20) - E2 (E3 - 28) | Y-B - BR | Intake Air Temperature Sensor | Idling, Intake Air Temp. at 20°C (68°F) | 0.5 to 3.4 |
| VTA (E3 - 21) - E2 (E3 - 28) | Y-R - BR | Throttle Position Sensor | IG Switch ON, Throttle Valve Fully Closed | 0.3 to 1.0 |
| IG Switch ON, Throttle Valve Fully Open | 3.2 to 4.9 | |||
| #1 (E3 - 1) - E01 (E3 - 7) | B-O - BR | Injector | IG Switch ON | 8 to 14 |
| #2 (E3 - 2) - E01 (E3 - 7) | B-Y - BR | |||
| #3 (E3 - 3) - E01 (E3 - 7) | B-W - BR | |||
| #4 (E3 - 4) - E01 (E3 - 7) | B-L - BR | |||
| IGT1 (E3 - 8) - E1 (E4 - 7) | G-R - BR | Ignition Coil And Igniter (Ignition Signal) | Idling | Pulse generation (See DTC P0351 IGNITION COIL "A" PRIMARY/SECONDARY CIRCUIT, DTC P0352 IGNITION COIL "B" PRIMARY/SECONDARY CIRCUIT, DTC P0353 IGNITION COIL "C" PRIMARY/SECONDARY CIRCUIT, DTC P0354 IGNITION COIL "D" PRIMARY/SECONDARY CIRCUIT ) |
| IGT2 (E3 - 9) - E1 (E4 - 7) | G-B - BR | |||
| IGT3 (E3 - 10) - E1 (E4 - 7) | G-O - BR | |||
| IGT4 (E3 - 11) - E1 (E4 - 7) | G-Y - BR | |||
| IGF (E3 - 23) - E1 (E4 - 7) | Y - BR | Ignition Coil And Igniter (Ignition Confirmation Signal) | IG Switch ON | 4.5 to 5.5 |
| Idling | Pulse generation (See DTC P0351 IGNITION COIL "A" PRIMARY/SECONDARY CIRCUIT, DTC P0352 IGNITION COIL "B" PRIMARY/SECONDARY CIRCUIT, DTC P0353 IGNITION COIL "C" PRIMARY/SECONDARY CIRCUIT, DTC P0354 IGNITION COIL "D" PRIMARY/SECONDARY CIRCUIT ) | |||
| RSD (E3 - 5) - E01 (E3 - 7) | B-R - BR | Idle Air Control Valve | IG Switch ON | 9 to 14 |
| OCV+ (E3 - 15) - OCV- (E3 - 14) | R-Y - R-B | Camshaft Timing Oil Control Valve | IG Switch ON | Pulse generation (See CUSTOMER PROBLEM ANALYSIS CHECK 3) |
| KNKL (E4 - 1) - E1 (E4 - 7) | W - BR | Knock Sensor | Idling | Pulse generation (See DTC P0325 KNOCK SENSOR 1 CIRCUIT (BANK 1 OR SINGLE SENSOR) ) |
| TC (E6 - 20) - E1 (E4 - 7) | P-B - BR | Terminal TC of DLC 3 | IG Switch ON | 9 to 14 |
| SIL (E6 - 18) - E1 (E4 - 7) | LG-B - BR | Terminal SIL of DLC3 | Connect Hand-Held Tester To DLC3 | Pulse Generation |
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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