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 MANUALSBUICK2010LUCERNE CXL, 3.9 1REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 320 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - ENGINE CONTROL MODULE X2 THROUGH PRESSURE CONTROL SOLENOID)COMPONENT CONNECTOR END VIEWSINTERNAL MODE SWITCH (IMS)
2010 Buick Lucerne CXL, 3.9 1
Internal Mode Switch (IMS)
2010 Buick Lucerne CXL, 3.9 1SECTION Internal Mode Switch (IMS)
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Internal Mode Switch (IMS)
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| A | 0.5 BK | 1786 | Park/Neutral Signal |
| B | 0.35 BU/WH | 772 | Transmission Range Switch Signal B |
| C | 0.5 BK/WH | 1551 | Ground |
| D | 0.35 YE/BK | 773 | Transmission Range Switch Signal C |
| E | 0.35 GY/WH | 776 | Transmission Range Switch Signal P |
| F | 0.35 RD/BK | 771 | Transmission Range Switch Signal A |
Connector Part Information
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Terminal Part Information
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RENDER: 1.0x
NO RELATED
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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.