DTC P0443: An electrical problem in the EVAP Canister Purge Valve circuit. Reset the ECM/PCM (see page 11-312). Turn the ignition switch ON (II). Is the DTC P0443 indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires between the EVAP canister purge valve and at the ECM/PCM. Turn the ignition switch OFF. Disconnect the vacuum hose (A) from the EVAP canister (B) and connect a vacuum gauge (C) to the hose. Start the engine end let it idle. Is there vacuum? YES - Go to step 6. NO - Go to step 11. Turn the ignition switch OFF. Disconnect the EVAP canister purge valve 2P connector.

Check for continuity between the EVAP canister purge valve 2P connector terminal No. 2 and body ground. EVAP CANISTER PURGE VALVE 2P CONNECTOR Wire side of female terminals Is there continuity? YES - Go to step 9. NO - Replace the EVAP canister purge valve. Disconnect ECM/PCM connector B (24P). Check for continuity between the EVAP canister purge valve 2P connector terminal No. 2 and body ground. EVAP CANISTER PURGE VALVE 2P CONNECTOR Wire side of female terminals Is there continuity? YES - Repair short in the wire between the EVAP canister purge valve and the ECM/PCM (B21). NO - Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.