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Home >> Suzuki >> 2002 >> Grand Vitara JLS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0447: EVAP Circuit, Vent Control Circuit Open >> 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, see and perform A4: ENGINE SYSTEM CHECK  under SYSTEM TESTS and go to next step.
  2. With ignition switch OFF, disconnect EVAP canister vent valve connector. Turn switch ON and measure voltage between EVAP canister vent valve connector C55 terminal No. 1 and ground. If voltage is 10-14 volts, go to next step. If voltage is not 10-14 volts, check if Blue/Black circuit is open or shorted to ground. Repair as necessary and go to DTC CONFIRMATION TEST  .
  3. With ignition switch OFF, disconnect ECM (PCM) connectors. Check for continuity between ECM connector C51-3 terminal No. 19 and EVAP canister vent valve connector C55 terminal No. 2. If continuity is present, go to next step. If continuity is not present, check if Violet/Red circuit is open. Repair as necessary and go to DTC CONFIRMATION TEST  .
  4. Measure resistance between EVAP canister vent valve connector C55 terminal No. 2 and ground. If resistance is infinity, go to next step. If resistance is not infinity, check if Violet/Red circuit is shorted to ground. Repair as necessary and go to DTC CONFIRMATION TEST  .
  5. Inspect EVAP canister vent valve, see EVAP CANISTER VENT VALVE in SYSTEM & COMPONENT TESTING article. If result is satisfactory, check ECM (PCM) for intermittent trouble. If result is not satisfactory, replace EVAP canister vent valve and go to DTC CONFIRMATION TEST  .
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