1993 Acura Integra GS-RFACTORY OEM SERVICE PROCEDURE

PCM Input Signals

  1. Timing control and triggering of fuel injectors are based on input signals from TDC/CRANK/CYL sensors. These sensors are Permanent Magnet (PM) generator pick-up coils.
  2. Using a DVOM (preferably with bar-graph function) on low-volt scale, check each sensor for pulse voltage signal at indicated PCM harness terminals with engine cranking. See PCM INPUT SIGNAL & RESISTANCE TEST TERMINALS  table. If pulse signal is present, sensor is okay. If pulse signal is not present, go to step 3.
  3. Turn ignition off. Disconnect PCM connector. Check wiring harness and connectors. Check resistance of each sensor at indicated PCM harness terminals. See PCM INPUT SIGNAL & RESISTANCE TEST TERMINALS  table. If resistance is within specification, go to step 4. If resistance is not within specification, go to step 5.
    PCM INPUT SIGNAL & RESISTANCE TEST TERMINALS

    Application PCM Terminals (1) Ohms
    Integra
    CRANK B15 & B16 350-700 Ohms
    CYL B11 & B12 350-700 Ohms
    TDC B13 & B14 350-700 Ohms
    Legend
    CRANK No. 1 B15 & B16 650-900 Ohms
    CRANK No. 2 B14 & B13 650-900 Ohms
    CYL No. 1 B12 & B11 650-900 Ohms
    CYL No. 2 B9 & B10 650-900 Ohms
    Vigor
    CRANK B15 & B16 650-850 Ohms
    CYL B11 & B12 650-850 Ohms
    TDC B13 & B14 650-850 Ohms
    (1)
    See Fig 1.
    Fig 1: PCM Connector Terminal Identification
    G92B26196Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Check continuity to ground on each terminal. If continuity exists, disconnect sensor connector, and recheck appropriate PCM terminal for continuity to ground. If continuity still exists, repair short to ground in harness. If continuity does not exist, replace sensor assembly.
  5. Disconnect sensor connector. Check resistance of sensor. See Fig 2, Fig 3 or Fig 4 . If resistance is within specification, repair open, short or corrosion in sensor harness between PCM and sensor. See PCM INPUT SIGNAL & RESISTANCE TEST TERMINALS  table. If sensor resistance is not within specification, replace sensor assembly.
    Fig 2: Identifying Sensor Connector Terminals (Integra)
    G92C26197Courtesy of AMERICAN HONDA MOTOR CO., INC.
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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.

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