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Home >> Isuzu >> 2000 >> Hombre S, 2.2 4, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Trouble Code Identification >> DTC P0200: Injector Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

  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. Attempt to start engine. If engine starts, go to next step. If engine will not start, see BASIC DIAGNOSTIC PROCEDURES article.
  3. Install Tech 2 scan tool. Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME data, and note parameters. Select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine and allow engine to idle for one minute. Operate vehicle within conditions required for setting this DTC, and as close to conditions recorded in FREEZE FRAME as possible. If DTC P0200 resets, go to next step. If DTC P0200 does not reset, go to DIAGNOSTIC AIDS .
  4. Turn ignition off. Remove air cleaner outlet resonator. Disconnect all injector connectors. Install an injector test light at No. 1 injector harness connector. Crank engine and observe test light. Check remaining fuel injectors. If test light flashes for all injectors, perform INJECTOR BALANCE TEST. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article. If test light does not flash at all injectors, go to next step.
  5. If test light did not flash in step  4 but was on steady, go to next step. If test light did not flash in step  4 and was off, go to step  9.
  6. Disconnect PCM connectors. With test light connected to positive battery terminal, probe affected injector driver circuits. See SYSTEM WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step  8.
  7. Repair short to ground in injector driver circuit. After repairs, go to step  15.
  8. Replace PCM. Program replacement PCM using appropriate equipment. See PROGRAMMING . After replacing PCM, go to step  15.
  9. With test light connected to ground, probe ignition feed circuit (Gray wire) terminal at affected injector harness connector. Crank engine. If test light does not illuminate, go to step  11. If test light illuminates, go to next step.
  10. With test light still connected to ground, probe injector driver circuit terminal at affected injector harness connector. See SYSTEM WIRING DIAGRAMS article. Crank engine. If test light does not illuminate, go to step  12. If test light illuminates, go to step  13.
  11. Repair open in injection feed circuit (Gray wire). After repairs, go to step  15.
  12. Check for open or faulty connection in injector driver circuit. Repair as necessary. After repairs, go to step  15. If circuit is okay, go to step  8.
  13. Repair short to voltage in injector driver circuit. After repairs, go to step  15.
  14. Repair open or faulty connection in injector driver circuit. After repairs, go to next step.
  15. 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 which was set. 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.
  16. 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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