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Home >> Suzuki >> 2006 >> Aerio Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0444: Evaporative Emission System Purge Control Valve Circuit Open >> DTC Troubleshooting
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DTC Troubleshooting

WARNING: In order to reduce risk of fire and personal injury, this work must be performed in a well ventilated area and away from any open flames such as gas water heater.
DIAGNOSIS PROCEDURE

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2  Check EVAP canister purge power supply circuit 
  1. Turn OFF ignition switch, disconnect connector from EVAP canister purge valve.
  2. Measure voltage between engine ground and "BLK/RED" wire terminal of EVAP canister purge valve connector with ignition switch turned ON.

Is it voltage 10 - 14 V? 		 Go to step 3. Open wire in "BLK/RED" circuit.
3  Check wire circuit 
  1. Disconnect connectors from ECM with ignition switch turn OFF.
  2. Measure resistance between "C46-30" terminal of ECM connector and vehicle body ground.

Is resistance infinity? 		 Go to Step 4. "BLU/BLK" wire shorted to ground circuit.
4  Check wire circuit 
  1. Measure voltage between "C46-30" terminal of ECM connector and vehicle body ground with ignition switch turned ON.

Is voltage 0 V? 		 Go to Step 5. "BLU/BLK" wire shorted to other circuits.
5  Check wire circuit 
  1. Connect connector to EVAP canister purge valve with ignition switch turned OFF.
  2. Turn ON ignition switch, measure voltage between "C46-30" terminal of ECM connector and vehicle body ground.

Is it voltage 10 - 14 V? 		 Go to Step 6. Open wire in "BLU/BLK" circuit.
6  Check EVAP canister purge valve 
  1. Check EVAP canister purge valve referring to EVAP CANISTER PURGE VALVE INSPECTION .

Is it good condition? 		 Go to Step 7. Faulty EVAP canister purge control valve.
7  Check EVAP canister purge control circuit 
  1. With ignition switch turn OFF, measure resistance between "G04-6 (or G04-7)" terminal and "C46-30" terminal of ECM connector.

Is resistance below 40 ohm at 20°C, 68°F? 		 Faulty ECM, substitute a known-good ECM and recheck. High resistance wire in "BLK/RED" and/or "BLU/BLK" circuit.
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