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Home >> Honda >> 2000 >> CR-V SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Trouble Code Identification >> DTC P0302: Cylinder No. 2 Misfire Detected >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic II (OBD-II) system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK in SELF-DIAGNOSTICS - INTRODUCTION article. After performing OBD-II system check, go to next step.
  2. If any other DTCs are set, diagnose DTCs as necessary before proceeding. If no other DTCs are set, go to next step.
  3. Perform a visual inspection of the following. Check vacuum hoses for splits, kinks and proper routing. Check for leaks at throttle body, intake manifold, EGR valve and PCV system. Check PCM grounds for proper connection. Check injector harness connectors for proper installation. Repair as necessary. After repairs, go to step  6. If no problems are found, go to next step.
  4. Install Tech 2 scan tool. Start engine and allow it to idle. Using scan tool, select MISFIRE DATA LIST function and monitor MISFIRE CURRENT counters (one counter per cylinder). If MISFIRE CURRENT NO. 2 counter is incrementing, go to next step. If MISFIRE CURRENT NO. 2 counter is not incrementing, go to step  6.
  5. Turn ignition off. Disconnect fuel injector harness connector. Install Spark Tester (J-26792) to cylinder No. 2 spark plug wire. Remove No. 3 spark plug wire from ignition coil. Connect a jumper wire between ground and ignition coil tower (where No. 3 spark plug wire was). Crank engine and check for spark. If spark exists, go to step  8. If spark does not exist, go to step  9.
  6. T. Using scan tool, review FREEZE FRAME data, and note parameters. Start engine and operate vehicle within conditions required for setting this DTC, and as close to conditions recorded in FREEZE FRAME as possible. If MISFIRE CURRENT NO. 2 counter is incrementing, go to step  5. If MISFIRE CURRENT NO. 2 counter is not incrementing, go to next step.
  7. If a repair of vacuum hoses was made after visual inspection was performed in step  3, go to step  30. If no problems were found in visual inspection, see DIAGNOSTIC AIDS .
  8. Remove spark plug from No. 2 cylinder. Replace spark plug with a known-good spark plug. Reconnect fuel injection harness connector. Operate vehicle within misfire conditions as recorded in FREEZE FRAME. If MISFIRE CURRENT NO. 2 counter is incrementing properly, go to step  13. If MISFIRE CURRENT NO. 2 counter is not incrementing properly, go to step  22.
  9. Remove spark plug wire from No. 2 cylinder. Using DVOM, check plug wire resistance. If resistance is less than 30 k/ohms, go to next step. If resistance is not less than 30 k/ohms, go to step  23.
  10. Remove ignition coil from cylinder that did not have spark. Check secondary resistance of coil. If resistance is 5-8 k/ohms, go to next step. If resistance is not 5-8 k/ohms, go to step  24.
  11. Replace coil with a known-good coil. Crank engine and check for spark. If spark is present, go to step  24. If spark is not present, go to next step.
  12. Disconnect and inspect Ignition Control Module (ICM) 6-pin connector. Repair as necessary. After repairs, go to step  30. If connector is okay, go to step  25.
  13. Turn ignition off. Disconnect all fuel injector connectors. Install injector test light on injector harness connector for No. 2 cylinder. Crank engine and observe test light. If test light flashes, go to next step. If test light does not flash, go to step  15.
  14. Perform INJECTOR BALANCE TEST. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article. If No. 2 injector is okay, go to step  28. If No. 2 injector is not okay, go to step  29.
  15. Remove injector test light. Connect a test light between ground and ignition feed terminal at No. 2 injector harness connector. See SYSTEM WIRING DIAGRAMS article. Crank engine and observe test light. If test light is on, go to next step. If test light is off, go to step  27.
  16. Turn ignition off. Disconnect PCM connectors. With test light connected to ground, probe injector driver circuit terminal at No. 2 injector harness connector. If test light is off, go to next step. If test light is on, go to step  26.
  17. With test light connected to positive battery terminal, probe injector driver circuit terminal at No. 2 injector harness connector. If test light is off, go to next step. If test light is on, go to step  19.
  18. Inspect PCM connectors for damaged pins, corrosion and loose wires. If connectors are okay, go to step  20. If connectors are not okay, go to step  21.
  19. Repair short to ground in cylinder No. 2 fuel injector driver circuit. After repairs, go to step  30.
  20. Replace PCM. Program replacement PCM using appropriate equipment. See PROGRAMMING . After replacing PCM, go to step  30.
  21. Repair PCM connector or connections as necessary. After repairs, go to step  30.
  22. Replace faulty spark plug. After repairs, go to step  30.
  23. Replace faulty spark plug wire. After repairs, go to step  30.
  24. Replace faulty ignition coil. After repairs, go to step  30.
  25. Replace faulty ICM. After replacing module, go to step  30.
  26. Repair short to voltage in cylinder No. 2 fuel injector driver circuit. After repairs, go to step  30.
  27. Repair open in ignition feed circuit. After repairs, go to step  30.
  28. Check for a basic engine problem (compression, cam timing, throttle body leak, restricted airflow, etc.). Repair as necessary. After repairs, go to step  30.
  29. Replace defective fuel injector. After replacing injector, go to next step.
  30. Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Operate vehicle within conditions required for setting this DTC. Select SPECIFIC DTC function, then enter DTC P0302. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool does not indicate TEST RAN AND PASSED, repeat step  2.
  31. If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is indicated at this time.
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