DTC Confirmation Test

WARNING: This page is about a different car, the 2002 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Malfunction is detected when improper voltage is sent to ECM from EVAP Control System Pressure Sensor (EVAP-CSPS). Possible causes are:

EVAP-CSPS circuit open or shorted.
Blockage or leak in hose to EVAP-CSPS.
Defective EVAP-CSPS.
Defective EVAP Canister Vent Control Valve (EVAP-CVCV).
Defective EVAP Canister Purge Volume Control Valve (EVAP-CPVCV).
Defective EVAP canister.
Faulty hose between EVAP-CVCV and water separator.

CAUTION: DO NOT use ECM ground terminals when measuring voltage.

To set DTC, start engine and warm to normal operating temperature. Turn ignition off and wait at least 5 seconds. Turn ignition on. Using scan tool, select DATA MONITOR, and read FUEL T/TMP SE value. Ensure value is more than 32°F (0°C). Start engine and wait at least 20 seconds. If first trip DTC is detected, perform DIAGNOSTIC PROCEDURE .