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Home >> Isuzu >> 1997 >> Rodeo LS, 2.6 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.6L >> Circuit Testing >> DTC P0202 - Injector 2 Control Circuit >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board (OBD) System Check. See BASIC TESTING article. Go to next step.
  2. Attempt to start engine. If engine starts, go to next step. If engine does not start, see ENGINE CRANKS BUT WILL NOT RUN in BASIC TESTING article.
  3. Using scan tool, clear DTCs. Run engine for one minute and check scan tool. If DTC P0202 has reset, go to step 5). If DTC P0202 has not set, go to next step.
  4. Turn ignition on with engine off. Using scan tool, read FREEZE FRAME DATA and note parameters. Start engine and operate vehicle within FREEZE FRAME conditions. If DTC P0202 is reset, go to next step. If no DTC is set, go to DIAGNOSTIC AIDS.
  5. Turn engine off. Connect an Injector Test Light (J39021-45) to injector harness connector. Disable secondary ignition system to prevent engine from starting, and crank engine. If test light blinks, go to INJECTOR COIL TEST in SYSTEM/COMPONENT TESTS . If test light does not blink, go to next step.
  6. If test light was on steady in previous step, go to next step. If test light was not on steady in previous step, go to step 10).
  7. Disconnect PCM connector from affected injectors. Using test light connected to battery positive, probe affected injectors driver circuit at harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step 9).
  8. Repair short to ground in injector driver circuit. Perform On-Board (OBD) System Check. See BASIC TESTING article.
  9. Replace PCM. Program replacement PCM using required equipment. Perform On-Board (OBD) System Check. See BASIC TESTING article.
  10. Disconnect harness connector from fuel injector. Turn ignition on. Connect test light to chassis ground and probe each terminal of injector harness connector, (PCM side). If test light illuminates on Ignition (+) terminal only, go to step 12). If test light illuminates on other terminals including Ignition (+) terminal, go to next step.
  11. Repair short to voltage in injector driver circuit. Retest system.
  12. With test light still connected to ground, probe each terminal of injector harness connector, (injector side). If test light illuminates on any terminal, go to step 11). If test light does not illuminate, go to next step.
  13. Turn ignition off. Using an ohmmeter, check for an open between ignition terminal of injector harness connector (injector side) and each of the other terminals of injector harness connector (injector side). If all terminals have continuity, go to step 15). If any terminals were open, go to next step.
  14. Repair open in injector drive circuit or injector. Retest system.
  15. Check for an open in injector 2 control circuit between injector harness connector and PCM connector. If circuit is open, repair as necessary. Retest system. If circuit is okay, replace PCM. Program replacement PCM using required equipment. Retest system.
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