1993 Acura Integra GS-RFACTORY OEM SERVICE PROCEDURE

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

  1. Turn ignition off. Remove BACK-UP (7.5-amp) fuse from underhood fuse/relay box for 10 seconds to reset ECM. Check ECM for fault codes. If Code 4, 8 or 9 is not present, problem is intermittent. Check for poor connections at ECM and distributor. Test drive vehicle and retest.
  2. If MIL is on and indicates Code 4, 8 or 9, turn ignition off. Disconnect 8-pin connector from TDC/CRANK/CYL sensor connector at distributor. Check resistance between terminals of each sensor. See Fig 1 . See INPUT SIGNAL & RESISTANCE TEST TERMINALS  table. If resistance is not 350-700 ohms, replace distributor sub-assembly. If resistance is 350-700 ohms, go to step 3.
    INPUT SIGNAL & RESISTANCE TEST TERMINALS

    Sensor Code ECM Terminal Sensor Terminal
    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. Leaving ECM disconnected, connect ECM Test Harness (07LAJ-PT3010A ) to ECM harness connectors. Check resistance between ECM test harness 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, replace ECM and retest.
    Fig 1: Identifying TDC/CRANK/CYL Sensor Connector Terminals
    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.