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Home >> Isuzu >> 2000 >> Rodeo LSE, 2.2 D >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Trouble Code Identification >> DTC P0443: EVAP System Purge Control Valve Circuit Malfunction >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic II (OBD-II) system check. See SELF-DIAGNOSTICS - INTRODUCTION article. Go to next step.
  2. Turn ignition on with engine off. Using scan tool, read FAILURE RECORDS data and note parameters. Clear DTCs. Start engine and operate vehicle within FAILURE RECORDS data conditions. If scan tool indicates that DTC P0443 RAN AND PASSED, go to DIAGNOSTIC AIDS . If scan tool does not indicate DTC P0443 RAN AND PASSED, go to next step.
  3. Turn engine off. Disconnect EVAP canister purge control solenoid. Turn ignition on. Using a DVOM, check ignition feed circuit to EVAP canister purge control solenoid harness connector. If reading indicates 12 volts, go to step  5. If reading does not indicate 12 volts, go to next step.
  4. Check for an open ENGINE IG (15-amp) fuse located in underdash fuse/relay block. Also, check for an open or short in circuit between ENGINE IG (15-amp) fuse and EVAP canister purge control solenoid harness connector. Repair as necessary. Retest system.
  5. Using DVOM, measure resistance of EVAP canister purge control solenoid. If reading is less than 5 ohms, go to next step. If reading is greater than 5 ohms, go to step  7.
  6. Turn ignition off. Disconnect PCM connectors. Check EVAP canister purge control solenoid circuit between PCM and harness connector for an open or shorted condition. Repair as necessary. If circuit is okay, go to step  8.
  7. Replace EVAP canister purge control solenoid. Retest system.
  8. Replace and reprogram PCM using required equipment. See PROGRAMMING . Retest system.
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