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Home >> Suzuki >> 2001 >> Swift GL, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0451: EVAP System Pressure Sensor Performance >> DTC Confirmation Test
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DTC Confirmation Test

  1. Turn ignition off, connect scan tool and turn ignition on. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Ensure fuel tank is 1/4-3/4 full, vehicle is at an altitude of 8000 feet or below, barometric pressure is 75 kPa or more, ambient temperature is 14°F (-10°C) or more, intake air temperature is 158°F (70°C) or less, and engine coolant temperature 158-230°F (70-110°C). Drive vehicle at speeds of about 30-40 MPH under all driving conditions (stop and go, high and low load, or rapid acceleration and deceleration) for 15 minutes.
  2. Drive vehicle at speed of about 30-40 MPH with throttle steady for 3 more minutes. Stop vehicle. With ignition on, using scan tool, check completion status of EVAP system monitoring test in READINESS TESTS mode. If testing has not been completed, repeat DTC CONFIRMATION TEST . Allow engine to idle for 2 minutes. Check for DTC P0451. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM.
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