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Home >> Acura >> 1992 >> Integra GS-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls - System/Component Tests) >> Computerized Engine Controls >> Electronic Control Unit (Ecu) >> Power Circuits
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Power Circuits

WARNING: This page is about a different car, the 1992 Acura Legend. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check for battery voltage between ECU terminal D1 and ground. If battery voltage is not present, check fuse No. 15. (located in underdash fuse block). If fuse is okay, check for an open in Yellow/Blue wire between fuse block and ECU.
  2. Set ignition switch to ON position. Check for battery voltage between ground and ECU terminals A25 and C1. If battery voltage is not present, check fuse No. 5 (located in underdash fuse block). If fuse is okay, check for an open in Yellow/Black wire between ECU terminals A25 and B1 and main relay, defective main relay, or defective ignition switch.
  3. Connect voltmeter between ECU terminal C11 and ground. Hold ignition switch in START position. Battery voltage should be present between ECU terminal C11 and ground ONLY when ignition switch is in the START position.
  4. If battery voltage is not present, check fuse No. 14 (located in underdash fuse block). If fuse is okay, check for an open in Blue/White wire between fuse No. 18 and terminal C11 of ECU, or check for a defective ignition switch.
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