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Home >> Honda >> 1995 >> Prelude SE, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - System/Component Tests - 2.3L >> Computerized Engine Controls >> Engine Control Module (ECM) >> Power Circuits
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Power Circuits

  1. Check for battery voltage between ECM power terminal and ground. See POWER & GROUND CIRCUIT TERMINAL IDENTIFICATION  . See Fig 1 . If battery voltage does not exist, check appropriate ECM fuse i n underhood fuse box. See ECM POWER CIRCUIT FUSE IDENTIFICATION  . If fuse is okay, check for an open in wire between underhood fuse box and appropriate ECM power circuit terminal.
  2. Turn ignition on. Check for battery voltage between appropriate ECM power circuit terminal and ground. See POWER & GROUND CIRCUIT TERMINAL IDENTIFICATION  . If battery voltage does not exist, check appropriate fuse in underhood fuse box. See ECM POWER CIRCUIT FUSE IDENTIFICATION  . If fuse is okay, check for open in wire between fuse box and appropriate ECM power circuit terminal, and check for defective ignition switch.
    POWER & GROUND CIRCUIT TERMINAL IDENTIFICATION

    Application (1) ECM Terminal
    Ground Circuits A23, A24, A26 & B2
    Power Circuits
    Ignition Switch In OFF Position D1
    Ignition Switch In ON Position A13, A25 & B1
    (1) For terminal location, See Fig 1 .
    ECM POWER CIRCUIT FUSE IDENTIFICATION

    Application Fuse
    Ignition Switch In OFF Position CLOCK
    Ignition Switch In ON Position BACK-UP
    Fig 1: Identifying ECM Terminals
    G93I79051Courtesy of AMERICAN HONDA MOTOR CO., INC.
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