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.
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HOMESERVICE MANUALSSAAB19939000 CD, 2.3 B, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - SYSTEM/COMPONENT TESTSCOMPUTERIZED ENGINE CONTROLS (9000 SERIES TURBO)ELECTRONIC CONTROL MODULE (ECM)GROUND CIRCUIT
1993 Saab 9000 CD, 2.3 B, Standard
Ground Circuit
1993 Saab 9000 CD, 2.3 B, StandardSECTION Ground Circuit
- Turn ignition off. Locate ECM in engine compartment, between front and rear firewall partitions, on left side. Connect negative lead of ohmmeter to ground. Backprobe ECM terminals No. 24 (Black/White wire), No. 25 (Black/White wire), No. 46 (Black wire), and No. 47 (Black wire). Resistance should be zero ohms for each wire. If not, repair open to ground.
- Connect negative lead of DVOM to a good ground. Backprobe each terminal specified in step 1). With vehicle running, DVOM should indicate less than one volt. If voltage is higher than one volt, check for open, corrosion, or loose connection on appropriate ground lead.
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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.