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.
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HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 101 (ENGINE CONTROL SYSTEM - 3.8L - INTRODUCTION (2 OF 2))COMPONENT LOCATORENGINE CONTROLS CONNECTOR END VIEWSIGNITION CONTROL MODULE (ICM) CONNECTOR END VIEW
2006 Buick Terraza CXL, 3.5 L, AWD
Ignition Control Module (ICM) Connector End View
2006 Buick Terraza CXL, 3.5 L, AWDSECTION Ignition Control Module (ICM) Connector End View
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Ignition Control Module (ICM)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | WH | 423 | IC Timing Control |
| B | TN/BK | 424 | IC Timing Signal |
| C | L-BU/BK | 647 | Medium Resolution Engine Speed Signal |
| D | PU/WH | 430 | Low Resolution Engine Speed Signal |
| E | - | - | Not Used |
| F | BK | 630 | Camshaft Position Signal |
| G | YE | 573 | CKP Sensor 1 Signal |
| H | L-BU/WH | 1800 | CKP Sensor 2 Signal |
| J | BN/WH | 633 | CMP Sensor Signal |
| K | BK/WH | 51 | Ground |
| L | RD/BK | 453 | Low Reference |
| M | BK/WH | 836 | Low Reference |
| N | WH/BK | 644 | 12-Volt Reference |
| P | PK | 239 | Ignition 1 Voltage |
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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.