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.
1990 Oldsmobile Custom CruiserFACTORY OEM SERVICE PROCEDURE
Crankshaft Sensor Pick-Up Coil Short & Resistance Checks
- Set DVOM on the 2000-ohm scale. Connect leads to crank angle sensor, located on side of engine block. On 2.5L models, it will be necessary to remove ignition module. Crankshaft sensor resistance should be within specification in CRANKSHAFT SENSOR RESISTANCE table. If resistance is not as specified, replace sensor.
- Connect one ohmmeter lead to either sensor terminal. Touch other lead of ohmmeter to engine block. No continuity should exist. If continuity exists, sensor is shorted to ground and must be replaced.
CRANKSHAFT SENSOR RESISTANCE (OHMS)
| Application | Specification |
|---|---|
| Beretta, Cavalier, Corsica, Grand Prix & Lumina | 900-1200 |
| Celebrity, Century, Cutlass Calais, Grand Am, Skylark & 6000 (2.5) | 800-900 |
| Celebrity & 6000 (3.1) | 900-1200 |
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.