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Home >> Suzuki >> 2002 >> Esteem GL, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.6L >> Diagnostic Tests >> DTC P0441: EVAP System - Incorrect Purge Flow >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. If engine system check has been performed, go to next step. If engine system check has not been performed, go to A4: ENGINE SYSTEM CHECK  under SYSTEM TESTS.
  2. Check vacuum hoses for proper connection, leakage, plugging, and deterioration. If problem is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST  . If no problem is found, go to next step.
  3. Check EVAP canister purge system operation. See appropriate procedure under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If EVAP canister purge system is not okay, go to next step. If EVAP canister purge system is okay, go to step  5 .
  4. Turn ignition off. Check EVAP-Canister Purge Valve (EVAP-CPV) circuit operation. See EVAP CANISTER PURGE VALVE under FUEL EVAPORATION in SYSTEM & COMPONENT TESTING article. If EVAP-CPV circuit is okay, go to next step. If EVAP-CPV circuit is not okay, check for plugged vacuum passage. If vacuum passage is okay, go to step  8 .
  5. Turn ignition off. Check EVAP canister air valve circuit operation. See EVAP CANISTER AIR VALVE CIRCUIT under FUEL EVAPORATION in SYSTEM & COMPONENT TESTING article. If EVAP canister air valve circuit is okay, go to next step. If problem is found, replace EVAP canister air valve. After repair, repeat DTC CONFIRMATION TEST  .
  6. Check FTP sensor operation. See DTC P0451: EVAP SYSTEM PRESSURE SENSOR - RANGE/PERFORMANCE  . If problem is found, repair or replace as necessary. After repair, repeat DTC CONFIRMATION TEST  . If FTP sensor is okay, go to next step.
  7. Check for plugged EVAP system hoses connected to fuel tank. If problem is found, repair or replace as necessary. After repair, repeat DTC CONFIRMATION TEST  . If hoses are okay, problem is probably intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
  8. Turn ignition off. Check EVAP-CPV operation. See EVAP CANISTER PURGE VALVE under FUEL EVAPORATION in SYSTEM & COMPONENT TESTING article. If problem is found, replace EVAP-CPV. After repair, repeat DTC CONFIRMATION TEST  . If no problem is found, go to next step.
  9. Check for short or open in Red/Black wire between EVAP-CPV harness connector terminal No. 1 and ECM harness connector C21 terminals No. 2, and through to main relay. See Figure . See WIRING DIAGRAMS article. Also check for short or open in Red/Blue wire between EVAP-CPV harness connector terminal No. 2 and ECM harness connector C21 terminal No. 7. If problem is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST  . If no problem is found, go to next step.
  10. Substitute a known good ECM, and repeat DTC CONFIRMATION TEST  . If DTC does not reset, testing is complete.
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