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 Saturn Ion 1 AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls Connector End Views
Crankshaft Position (CKP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | PU | 574 | Low Reference |
| 2 | YE | 573 | CKP Sensor Signal |
Engine Coolant Temperature (ECT) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | BK | 2761 | Low Reference |
| 2 | YE | 410 | ECT Sensor Signal |
Evaporative Emission (EVAP) Canister Purge Solenoid Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 439 | Ignition 1 Voltage |
| B | D-GN/WH | 428 | EVAP Canister Purge Solenoid Control |
Evaporative Emission (EVAP) Canister Vent Solenoid Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 439 | Ignition 1 Voltage |
| B | WH | 1310 | EVAP Canister Vent Solenoid Control |
Fuel Injector 1 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 139 | Ignition 1 Voltage |
| B | BK | 1744 | Fuel Injector 1 Control |
Fuel Injector 2 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 139 | Ignition 1 Voltage |
| B | L-GN/BK | 1745 | Fuel Injector 2 Control |
Fuel Injector 3 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 139 | Ignition 1 Voltage |
| B | PK/BK | 1746 | Fuel Injector 3 Control |
Fuel Injector 4 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 139 | Ignition 1 Voltage |
| B | L-BU/BK | 844 | Fuel Injector 4 Control |
Fuel Pump Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | PK/BK | 120 | Fuel Pump Supply Voltage |
| 2 | BK | 650 | Ground |
Fuel Tank Pressure (FTP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | RD/PK | 469 | Low Reference |
| B | GY/RD | 890 | Fuel Tank Pressure Sensor Signal |
| C | BN/WH | 416 | 5-Volt Reference |
Heated Oxygen Sensor (HO2S) 1 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | TN | 1667 | HO2S Low Signal Sensor 1 |
| B | PU | 1666 | HO2S High Signal Sensor 1 |
| C | D-GN | 676 | HO2S Heater Low Control Sensor 1 |
| D | PK | 439 | Ignition 1 Voltage |
Heated Oxygen Sensor (HO2S) 2 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | TN/WH | 1669 | HO2S Low Signal Sensor 2 |
| B | PU/WH | 1668 | HO2S High Signal Sensor 2 |
| C | BK/WH | 1423 | HO2S Heater Low Control Sensor 2 |
| D | PK | 439 | Ignition 1 Voltage |
Idle Air Control (IAC) Valve Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | L-GN/BK | 444 | IAC Coil B Low Control |
| B | L-GN/WH | 1749 | IAC Coil B High Control |
| C | L-BU/BK | 1748 | IAC Coil A Low Control |
| D | L-BU/WH | 1747 | IAC Coil A High Control |
Ignition Control Module (ICM) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 239 | Ignition 1 Voltage |
| B | WH | 423 | IC Timing Control |
| C-D | - | - | Not Used |
| E | BK/WH | 451 | Ground |
| F | BN/WH | 633 | CMP Sensor Signal |
| G | OG | 406 | IC Timing Control (B) |
| H-J | - | - | Not Used |
Intake Air Temperature (IAT) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | TN | 472 | IAT Sensor Signal |
| B | BK | 2760 | Low Reference |
Knock Sensor (KS) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | D-BU | 496 | Knock Sensor Signal |
| B | GY | 1716 | Low Reference |
Manifold Absolute Pressure (MAP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | OG/BK | 469 | Low Reference |
| B | L-GN | 432 | MAP Sensor Signal |
| C | GY | 2704 | 5-Volt Reference |
Stop Lamp Switch-Lower (K34) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 339 | Ignition 1 Voltage |
| B | PU | 420 | Stop Lamp Switch Signal |
Stop Lamp Switch-Lower (w/o K34) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 339 | Ignition 1 Voltage |
| B | PU | 420 | Stop Lamp Switch Signal |
| C-D | - | - | Not Used |
Throttle Position (TP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | GY | 2701 | 5-Volt Reference |
| B | BK | 2752 | Low Reference |
| C | D-BU | 417 | TP Sensor Signal |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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