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Home >> Isuzu >> 1996 >> Rodeo LS, 2.6 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.6L 4-CYL >> Circuit Testing >> DTC P0202 - Injector 2 Control Circuit >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board (OBD) System Check. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. 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 - 2.6L 4-CYL 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 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 TESTING. 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. Replace short to ground in injector driver circuit and go to step 17).
  9. Replace PCM. Program replacement PCM using required equipment.
  10. Disconnect harness connector from fuel injector. Connect test light to chassis ground and probe ignition feed circuit of affected connector. Crank engine. If test light illuminates while cranking, go to next step. If test light does not illuminates, go to step 12).
  11. With test light still connected to ground, probe injector drive circuit of affected connector. Crank engine. If test light is on while cranking, go to step 14). If test light is not on while cranking, go to step 13).
  12. Repair open circuit in ignition feed circuit in injector harness and go to step 17).
  13. If an open is found in injector driver circuit, go to step 15). If no problem was found, go to step 16).
  14. Repair short to voltage in injector driver circuit and go to step 17).
  15. Repair open in injector drive circuit and go to step 17).
  16. Replace PCM. Program replacement PCM using required equipment.
  17. Using scan tool, read and record FAIL RECORDS DATA, and clear DTCs. Operate vehicle within conditions noted in FAIL RECORDS data. Using scan tool, select SPECIFIC DTC INFO for DTC P0202. If scan tool displays DTC P0202 FAILED THIS IGN, return to step 2). If scan tool does not display DTC P0202 FAILED THIS IGN, repair is complete.
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