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.
2007 Saturn Relay 3.9 1FACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Accessory AC/DC Power Control Module | Behind right rear interior body panel. See Figure. |
| Blower Motor Control Module - Auxiliary | In rear HVAC module, behind left rear interior body panel. See Figure. |
| Body Control Module (BCM) | Below left side of dash, left of steering column. See Figure. |
| Digital Radio Receiver | Behind left side of dash. See Figure. |
| Electronic Brake Control Module (EBCM) | On left strut tower. See Figure. |
| Engine Control Module | In air cleaner assembly. See Figure. |
| HVAC Control Module | In dash center trim panel, beneath radio. See Figure. |
| Ignition Control Module (ICM) | Top of valve cover. See Figure. |
| Inflatable Restraint Front Passenger Presence System (PPS) Module | Under passenger seat. See Figure. |
| Inflatable Restraint I/P Module | Above dash compartment. See Figure. |
| Inflatable Restraint Sensing And Diagnostic Module (SDM) | On floor below passenger seat. See Figure. |
| Inflatable Restraint Side Impact Module - Left | In left front seat back. See Figure. |
| Inflatable Restraint Side Impact Module - LR | In left middle seat back. |
| Inflatable Restraint Side Impact Module - Right | In right front seat back. See Figure. |
| Inflatable Restraint Side Impact Module - RR | In right middle seat back. |
| Inflatable Restraint Side Impact Sensing Module (SISM) - Left | In left "B" pillar. See Figure. |
| Inflatable Restraint Side Impact Sensing Module (SISM) - Right | In right "B" pillar. See Figure. |
| Inflatable Restraint Steering Wheel Module | In center hub of steering wheel. See Figure. |
| Inflatable Restraint Steering Wheel Module Coil | In steering column. See Figure. |
| Left Sliding Door Module (LSDM) | Behind left rear interior body panel. See Figure. |
| Memory Seat Module - Driver | Under driver seat. See Figure. |
| Rear Object Sensor Control Module | Behind right rear interior body panel. See Figure. |
| Remote Control Door Lock Receiver (RCDLR) | Below left upper side of dash, right of steering column. See Figure. |
| Right Sliding Door Module (RSDM) | Behind right rear interior body panel. See Figure. |
| Sit-N-Lift® Seat Module | In Sit-N-Lift® seat base. |
| Theft Deterrent Exciter Module | In steering column surrounding lock cylinder. See Figure. |
| Throttle Actuator Control (TAC) Module | Rear of engine, on throttle body assembly. See Figure. |
| Transmission Control Module | Behind coolant reservoir. See Figure. |
| Vehicle Communication Unit (VCU) | Behind upper left side of dash, to left of steering column. 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.