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.
2000 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS
| Component | Component Location |
|---|---|
| ABS/TCS Control Unit | Behind right side of dash. See Figure . |
| A/C Auto Amplifier | Behind dash, on left side of center console. See Figure . |
| Active Damper Suspension Control Unit | Under left side of rear package shelf. See Figure . |
| Air Bag Diagnosis Sensor Unit | Under rear of center console. See Figure . |
| ASCD Control Unit | Behind dash, left of steering column. See Figure . |
| ASCD Hold Unit | Behind dash, right of steering column. See Figure . |
| A/T Device | Under console, near base of selector lever. |
| Body Control Module (BCM) | Behind dash, right of steering column. See Figure . |
| Daytime Light Control Unit (Canada) | Left side of engine compartment. See Figure . |
| Driver's Seat Control Unit | Under driver's seat. See Figure . |
| ECCS Control Module (ECM) | Behind right kick panel. See Figure . |
| Fan Control Amplifier | Behind right side of dash, on cooling unit. |
| Fuel Pump Control Module (FPCM) | On left side of luggage compartment. See Figure . |
| IVCS Unit | At left front corner of luggage compartment. See Figure . |
| NATS IMMU | Under front of center console, near ashtray. See Figure . |
| Power Steering Control Unit | Behind dash, right side of center console. See Figure . |
| Shift Lock Control Unit | Behind dash, left of steering column. See Figure . |
| TAC Module | Behind right kick panel. See Figure . |
| Transmission Control Module (TCM) | Behind left kick panel. See Figure . |
| Trunk Closure Control Unit | At center rear of luggage compartment. See Figure . |
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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