Suzuki SY413 Service Manual page 2792

DTC P0443 PURGE CONTROL VALVE CIRCUIT MALFUNCTION
WIRING DIAGRAM
1. Main fuse
2. Relay box
3. Main relay
4. EVAP canister purge valve
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Monitor signal of EVAP canister purge valve is different from
command signal. (Circuit open or short)
(2 driving cycle detection logic)
DTC CONFIRMATION PROCEDURE
WARNING:
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When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and be very careful during testing to avoid occurrence of an accident.
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Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Start engine and warm up it completely.
4) Increase vehicle speed to 40 km/h (25 mph) or more.
5) Keep driving above vehicle speed for 5 min. or more (Charge of vehicle speed is permitted in this step).
6) Release accelerator pedal, stop vehicle and run engine at idle speed for 2 min.
7) Check DTC and pending DTC by using scan tool.
ENGINE GENERAL INFORMATION AND DIAGNOSIS (J18 ENGINE WITH WU TWC) 6-2-75
TROUBLE AREA
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EVAP canister purge valve and its circuit
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ECM