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.
1993 Volvo 850 AutomaticFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| ABS Control Unit | On left rear of engine compartment, on ABS hydraulic modulator. |
| Anti-Theft Alarm Control Module | On fuse/relay block, on left rear of engine compartment. |
| Anti-Theft Alarm/Central Lock Remote Control Module | Behind right side of dash. |
| Cruise Control Module | On fuse/relay block, on left rear of engine compartment. |
| Direct Ignition (DI) Control Module | On right front inner fender panel, in control box. See Figure . |
| Electronic Climate Control (ECC) Control Unit | Integrated with A/C control panel. |
| PFI Control Module | On right front inner fender panel, in control box. See Figure . |
| Power Memory Seat Control Unit | Under driver's and passenger's seat. |
| Sun Roof Control Module | Behind interior roof light assembly. |
| Transmission Control Module (TCM) | On right front inner fender panel, in control box. See Figure . |
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.