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Home >> Isuzu >> 2000 >> Hombre S, 4.3 W >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 4.3L >> Diagnostic Trouble Code Identification >> DTC P0325: Knock Sensor Module Circuit >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic II (OBD-II) System Check. See SELF-DIAGNOSTICS - INTRODUCTION article. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Ensure Tech 2 scan tool is installed. Operate vehicle within conditions required to set DTC. Using scan tool, select DTC, SPECIFIC function and enter DTC P0325. If scan tool displays DTC P0325 FAILED THIS IGN, go to step  4. If scan tool does not display DTC P0327 FAILED THIS IGN, go to next step.
  3. Turn ignition on, with engine off. Retrieve and record FAILED RECORDS data for DTC P0325. Operate vehicle within conditions required to set DTC. Select DTC, SPECIFIC function and enter DTC P0325. If scan tool displays DTC P0325 FAILED THIS IGN, go to next step. If scan tool does not display DTC P0325 FAILED THIS IGN, see DIAGNOSTIC AIDS .
  4. Check KS signal circuit (Dark Blue wire) for incorrect routing near secondary ignition wires. If no problem was found, go to next step. If problem was found, go to step  8.
  5. Check KS signal circuit (Dark Blue wire) for tight connection. If no problem was found, go to next step. If problem was found, go to step  8.
  6. Replace KS module. Operate vehicle within conditions required to set DTC. Select DTC, SPECIFIC function and enter DTC P0325. If scan tool displays DTC P0325 FAILED THIS IGN, go to next step. If scan tool does not display DTC P0325 FAILED THIS IGN, go to step  8.
  7. Replace VCM. Program replacement. See PROGRAMMING . After replacing VCM, go to next step.
  8. Using scan tool, select DTC, CLEAR INFO function. Start engine and allow it to reach operating temperature. Using scan tool, select DTC, SPECIFIC function and enter DTC P0325. Operate vehicle within conditions required to set DTC. If scan tool displays RAN AND PASSED, go to next step. If scan tool does not display RAN AND PASSED, return to step  2.
  9. Using scan tool, select Read and Record INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, diagnose affected DTCs. If no DTCs are displayed, system is okay.
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