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 M, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSCOMPUTERIZED ENGINE CONTROLS (EXCEPT 9000 SERIES TURBO)IGNITION ECM (9000 SERIES NON-TURBO)POWER CIRCUIT
1993 Saab 9000 CD, 2.3 M, Standard
Power Circuit
1993 Saab 9000 CD, 2.3 M, StandardSECTION Power Circuit
- Check for battery voltage between ECM terminal No. 22 (Red wire) and ground. If battery voltage does not exist, check fuse No. 23 on power distribution panel behind glove box. If fuse is okay, repair Red wire to fuse No. 23 or Red wire from fuse panel to main distribution terminal on battery bracket.
- Turn ignition on. Check for battery voltage between ECM terminal No. 35 (Green/Red wire) and ground. If battery voltage does not exist, check for open Green/Red wire from ECM terminal No. 35 to main relay terminal No. 3. If wire is okay, test main relay. See MAIN RELAY under RELAYS under MODULES, RELAYS & SOLENOIDS.
- Turn ignition on. Check for battery voltage between ECM terminal No. 21 (Green/White wire) and ground. If battery voltage does not exist, check fuse No. 9 on fuse panel in engine compartment. If fuse is okay, check for open Green/White wire from ECM to fuse panel, open Green/White wire from ignition switch to fuse panel, or defective ignition switch.
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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.