## Evaporative Emission Control System

#### DTC Troubleshooting

11-161

DTC P0443: EVAP Canister Purge Valve Circuit Malfunction.

1. Reset the ECM/PCM (see page 11-4).
2. 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.

3. Turn the ignition switch OFF.
4. Disconnect the vacuum hose (A) from the EVAP canister (B) and connect a vacuum gauge (C) to the hose.

5. Start the engine end let it idle.

Is there vacuum?

YES | - Go to step 6.
NO | - Go to step 11.

6. Turn the ignition switch OFF.
7. Disconnect the EVAP canister purge valve 2P connector.

8. 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.

9. Disconnect ECM/PCM connector B (24P).
10. 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 11-6). If symptom/indication goes away, replace the original ECM/PCM.