Suzuki 2000 Grand Vitara SQ625 Service Manual page 90

6-86 ENGINE DIAGNOSIS (G16 / J20 ENGINES)
DTC P0443 EVAP CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT MALFUNCTION
WIRING DIAGRAM
1. Main relay
2. Main fuse
3. EVAP canister purge valve
4. Fuse box
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 cycles detection logic)
DTC CONFIRMATION PROCEDURE
WARNING:
D When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and be very careful during testing to avoid occurrence of an accident.
D Road test should be carried out with 2 persons, a driver and a tester, on a level road.
NOTE:
Check to make sure that the following conditions are satisfied when using this DTC CONFIRMATION PRO-
CEDURE.
D Intake air temp.: –8_C, 18_F or higher
D Engine coolant temp.: –8 – 110_C (18 – 230_F)
D Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
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 55 km/h (35 mph) or more.
5) Keep driving above vehicle speed for 20 min. or more (Change 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.
TROUBLE AREA
D EVAP canister purge valve and its circuit
D ECM (PCM)