6-1-116 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE)
DTC P0443 EVAP Control System Purge Control Valve Circuit Malfunction
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC CONFIRMATION PROCEDURE
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 (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.
[A] : Terminal arrangement of ECM (PCM) coupler viewed from harness side 2. Main relay
1. Main fuse 3. EVAP canister purge valve
DTC DETECTING CONDITION TROUBLE AREA
Monitor signal of EVAP canister purge valve is different from
command signal. (Circuit open or short) (2 driving cycle
detection logic)
• EVAP canister purge valve and its circuit
• ECM (PCM)
WARNING:
• 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.
• 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
PROCEDURE.
• Intake air temperature : between –14°C and 70°C (6.8°F and 158°F)
• Atmospheric pressure : higher than 560 mmHg (Altitude : lower than 2790 m (9150 ft))
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