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.
2002 Saturn L200 AutomaticFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Speed Control Module | On front of HVAC assembly. |
| Body Control Module (BCM) | Mounted to top of glove box. See Figure. |
| Cooling Fan Control Module | Near battery. |
| Electronic Brake/Traction Control Module (EBTCM) | At left rear of engine compartment. |
| Electronic Ignition (EI) Module (2.2L) | On top of engine, attached to ignition coil housing. See Figure. |
| Electronic Ignition (EI) Module/ 1, 3, 5 Coils (3.0L) | Under right side of upper intake manifold runner. See Figure. |
| Electronic Ignition (EI) Module/ 2, 4, 6 Coils (3.0L) | Under left side of upper intake manifold runner. See Figure. |
| Engine Control Module (ECM) (3.0L) | On top right rear of engine. See Figure. |
| OnStar Communication Interface Module (CIM) (Sedan) | On right side of package shelf. |
| OnStar Communication Interface Module (CIM) (Wagon) | Below right side of load floor. |
| Powertrain Control Module (PCM) (2.2L) | Right rear of engine compartment. See Figure. |
| Sensing & Diagnostic Module (SDM) | Under rear of floor console. |
| Transaxle Control Module (TCM) (3.0L) | At right rear corner of engine compartment, behind strut tower. |
| Wheel Speed Signal Conditioner Module (2.2L) | Behind left side of dash, above hood release. |
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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