1992 Acura Integra GS-RFACTORY OEM SERVICE PROCEDURE

Code 4, 8 0R 9: TDC/CYL/Crank Sensor

  1. Turn ignition off. Remove BACK UP fuse from under hood fuse/relay box for 10 seconds to reset ECU. Check ECU for fault codes. See RETRIEVING CODES  . If Code 4, 8 or 9 is not present, problem is intermittent. Check for poor connections at ECU and distributor. Test drive vehicle and retest.
  2. If CHECK ENGINE light is on and indicates Code 4, 8 or 9, turn ignition off. Disconnect 8-pin connector from TDC/CYL/CRANK sensor connector at distributor. Check resistance between terminals of each sensor. See Fig 1 . If resistance is not 350-700 ohms, replace distributor sub-assembly. See INPUT SIGNAL & RESISTANCE TEST TERMINALS  table. If resistance is 350-700 ohms, go to step 4).
    INPUT SIGNAL & RESISTANCE TEST TERMINALS

    Sensor Code ECU Terminals Sensor Terminals
    CRANK 4 B15 B
    CRANK 4 B16 F
    CYL 9 B11 D
    CYL 9 B12 H
    TDC 8 B13 C
    TDC 8 B14 G
  3. Check continuity to body ground on each terminal. If continuity exists, replace distributor sub-assembly. If continuity does not exist, reconnect 8-pin connector. Connect ECU Test Harness (07LAJ-PT3010A ) to ECU connector, leaving ECU disconnected. Check resistance between ECU terminals. See INPUT SIGNAL & RESISTANCE TEST TERMINALS  table.
  4. If resistance is not 350-700 ohms, repair open in faulty circuit. If resistance is 350-700 ohms, check for continuity to body ground on test terminals B11, B13 and B15. If continuity exists on any terminal, repair short circuit. If continuity does not exist, substitute a known good ECU. If symptom/condition goes away, replace original ECU.
    Fig 1: TDC/CRANK/CYL Sensor Connector Terminal ID
    G92G26209Courtesy 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.