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Home › Saab › 1995 › 900 S, 2D Convertible, Standard › Repair and Diagnosis › External Pages › Different car › Section 10 (Engine Controls - System/Component Tests) › Computerized Engine Controls › Electronic Control Module (ECM) (900 Series With MOTRONIC System) › Power Circuit

Power Circuit

WARNING: This page is about a different car, the 1996 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check for battery voltage at terminals No. 26 (Pink/White wire) and No. 54 (Green/Red wire). If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Pink/White wire between ECM and fuse panel.
  2. Turn ignition on. On 2.3L, battery voltage should exist between ECM terminal No. 58 (Yellow/Gray wire) and ground. On 2.5L, battery voltage should exist between ECM terminal No. 57 (Yellow/Gray wire) and ground. On all models, if battery voltage does not exist, repair open circuit.
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