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.
2001 Volvo S40FACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Component Location |
|---|---|
| ABS Control Module | In right front corner of engine compartment. See Figure . |
| Automatic Transmission Control Module (TCM) | Behind lower center of dash. See Figure . |
| Central Electric Module (CEM) | Behind left end of dash. See Figure . |
| Climate Control Module (CCM) | Integral with A/C controls, in center of dash. |
| Cruise Control Module | Behind lower center of dash. See Figure . |
| DSA Control Module | Behind right side of dash. See Figure . |
| Electronic Immobilizer Control Module | Behind left end of dash. See Figure . |
| Engine Control Module (ECM) | Behind lower center of dash. See Figure . |
| Key-Inserted/Seat Belt Reminder Control Module | In passenger compartment fuse & relay box. |
| Passenger Compartment Fan Speed Control Module | Behind right side of dash, on bottom of HVAC assembly. |
| SRS Control Module | Below rear of center console, between front seats. See Figure . |
| Ultrasonic Glass Breakage Sensor Control Module | Below right side of dash. |
| VGLA Control Module | Behind lower center of dash. |
| VGLA Receiver | In rear of engine compartment. |
Factory Service Tools
Use the Manual With the Right Hardware
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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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