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.
2006 Pontiac Solstice AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Control Module (ECM) C2
Engine Control Module (ECM) Connector End Views
Connector Part Information
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Terminal Part Information
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Engine Control Module (ECM) C2
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | PU | 2121 | Ignition Control (1) (LE5) |
| 2 | TN/WH | 3111 | Heated Oxygen Sensor Low Signal Bank 1 Sensor (1) (LE5) |
| 3 | PU/WH | 3110 | Heated Oxygen Sensor High Signal Bank 1 Sensor (1) (LE5) |
| 4 | PU/WH | 1668 | Heated Oxygen Sensor High Signal Bank 1 Sensor (2) (LE5) |
| 5 | TN/WH | 1669 | Heated Oxygen Sensor Low Signal Bank 1 Sensor (2) (LE5) |
| 6-7 | - | - | Not Used |
| 8 | D-BU | 496 | Knock Sensor Signal (1) (LE5) |
| 9 | GY | 1716 | Knock Sensor Low Reference (1) (LE5) |
| 10 | - | - | Not Used |
| 11 | YE | 581 | Throttle Actuator Control Open (LE5) |
| 12 | BN | 582 | Throttle Actuator Control Close (LE5) |
| 13 | PK/BK | 5290 | Engine Main Relay Fused Control (1) (LE5) |
| 14 | PU | 5284 | Camshaft Phaser Intake Solenoid (1) (LE5) |
| 15-16 | - | - | Not Used |
| 17 | L-BU | 2123 | Ignition Control (3) (LE5) |
| 18-19 | - | - | Not Used |
| 20 | GY | 5296 | Camshaft Position Exhaust Sensor Low Reference (1) (LE5) |
| 21-22 | - | - | Not Used |
| 23 | TN | 5301 | Camshaft Position Intake Sensor Low Reference (1) (LE5) |
| 24-26 | - | - | Not Used |
| 27 | PU | 574 | Crankshaft Position Sensor Low Reference (1) (LE5) |
| 28 | - | - | Not Used |
| 29 | TN | 2752 | Throttle Position Sensor Low Reference (LE5) |
| 30 | L-GN | 5282 | Camshaft Phaser Exhaust Solenoid (1) (LE5) |
| 31 | - | - | Not Used |
| 32 | L-GN/BK | 1745 | Fuel Injector Control (2) (LE5) |
| 33 | D-GN/WH | 2124 | Ignition Control (4) (LE5) |
| 34 | - | - | Not Used |
| 35 | BN | 2129 | Ignition Control Low Reference Bank 1 (LE5) |
| 36 | YE/BK | 5297 | Camshaft Position Exhaust Sensor Supply Voltage (1) (LE5) |
| 37-38 | - | - | Not Used |
| 39 | D-BU | 5300 | Camshaft Position Intake Sensor Supply Voltage (1) (LE5) |
| 40-41 | - | - | Not Used |
| 42 | BK | 2760 | Intake Air Temperature Sensor Low Reference (LE5) |
| 43 | L-GN | 2867 | Crankshaft Position Sensor Supply Voltage (LE5) |
| 44 | GY | 2701 | Throttle Position Sensor 5-Volt Reference (LE5) |
| 45 | - | - | Not Used |
| 46 | TN | 2199 | Camshaft Phaser Solenoid Low Reference (LE5) |
| 47 | - | - | Not Used |
| 48 | PK/BK | 1746 | Fuel Injector Control (3) (LE5) |
| 49 | - | - | Not Used |
| 50 | TN | 452 | Sensor Low Reference (LE5) |
| 51-52 | - | - | Not Used |
| 53 | OG/WH | 2122 | Ignition Control (2) (LE5) |
| 54-55 | - | - | Not Used |
| 56 | D-GN | 5273 | Camshaft Position Exhaust Sensor (1) (LE5) |
| 57-58 | - | - | Not Used |
| 59 | OG | 5275 | Camshaft Position Intake Sensor (1) (LE5) |
| 60-61 | - | - | Not Used |
| 62 | TN | 472 | Intake Air Temperature Sensor Signal (LE5) |
| 63 | YE | 573 | Crankshaft Position Sensor Signal (1) (LE5) |
| 64 | D-GN | 485 | Throttle Position Sensor Signal (1) (LE5) |
| 65 | - | - | Not Used |
| 66 | PU | 486 | Throttle Position Sensor Signal (2) (LE5) |
| 67 | YE | 492 | Mass Air Flow Sensor Signal (LE5) |
| 68 | GY/WH | 3113 | Heated Oxygen Sensor Heater Low Control Bank 1 Sensor (1) (LE5) |
| 69 | GY/WH | 3122 | Heated Oxygen Sensor Heater Low Control Bank 1 Sensor (2) (LE5) |
| 70 | - | - | Not Used |
| 71 | L-BU/BK | 844 | Fuel Injector Control (4) (LE5) |
| 72 | TN | 1744 | Fuel Injector Control (1) (LE5) |
| 73 | BK/WH | 451 | Signal Ground |
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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