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Home >> Acura >> 1988 >> Integra LS, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Control System >> Testing Information >> Code 9 - Cylinder Sensor

Code 9 - Cylinder Sensor

  1. Turn ignition off and remove hazard fuse at battery positive terminal for 10 seconds to reset ECU. Start engine and observe PGM-FI warning light. If light is off, problem is intermittent. Test drive and check again.
  2. If light is on, turn engine off. Disconnect sensor connector nearest the sensor. Connect ohmmeter leads to sensor connector. If reading is not 700-1000 ohms, replace sensor. If reading is within specifications, proceed to next step.
  3. Check continuity between ground and each sensor terminal. If continuity exists, replace sensor. If no continuity exists, proceed to next step.
  4. Reconnect sensor connector. Attach system checker harness to main wire harness only, not to ECU. Using an ohmmeter, check resistance between connector terminals C1 and C2. Resistance should be 700-1000 ohms.
  5. If resistance is not within specifications, repair open in Orange and/or White wires. If resistance is within specification, substitute a known good ECU. If condition is rectified, replace original ECU.
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