Turn the ignition switch OFF. Disconnect the EVAP canister purge valve 2P connector. Turn the ignition switch ON (II). At the harness side, measure voltage between the EVAP canister purge valve 2P connector terminal No. 1 and body ground. EVAP CANISTER PURGE VALVE 2P CONNECTOR Wire side of female terminals Is there battery voltage? YES - Go to step 15. NO - Repair open in the wire between No. 4 ACG (10 A) fuse in the under-dash fuse/relay box and the EVAP canister purge valve. Turn the ignition switch OFF. Reconnect the EVAP canister purge valve 2P connector. Turn the ignition switch ON (II).

Measure voltage between ECM/PCM connector terminals A5 and B21. ECM/PCM CONNECTORS A (31P) Wire side of female terminals Is there battery voltage? YES - Substitute a known-good ECM/PCM and recheck (see page 11-6). If symptom/indication goes away, replace the original ECM/PCM. NO - Repair open in the wire between the EVAP canister purge valve and the ECM/PCM (B21). If wire is OK, replace the EVAP canister purge valve.