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Home >> Acura >> 1988 >> Integra SE, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes >> Self-Diagnostic System >> Code 9 - CYL Sensor
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Code 9 - CYL Sensor

  1. Turn ignition off. Remove hazard fuse at battery positive terminal for 10 seconds to reset ECU. Start engine and observe "CHECK ENGINE" light. If light is off, problem is intermittent. Test drive vehicle 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 specification, 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 ECU test harness to main wire harness side only. Using an ohmmeter, check resistance between ECU harness terminals C1 and C2. See Figure . Resistance should be 700-1000 ohms.
  5. If resistance is not as specified, repair open Orange wire and/or White wire. If resistance is okay, check for continuity between terminal C1 and ground. If continuity exists, repair short in Orange wire between ECU terminal C1 and sensor connector. If continuity does not exist, substitute a known good ECU and retest. If condition is rectified, replace original ECU.
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