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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 204 (Engine Controls - Self-Diagnostics - 1.8L - Ca) >> Diagnostic Tests >> DTC P0444 Or DTC P0445: EVAP Canister Purge Volume Control Valve >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect EVAP Canister Purge Volume Control Solenoid Valve (EVAP-CPVCSV) harness connector. See Figure . Turn ignition on. Measure voltage between ground and terminal No. 1 (Brown wire) at EVAP-CPVCSV harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short in Brown wire between EVAP-CPVCSV and fuse box, then retest system.
  2. Turn ignition off. Disconnect PCM harness connector. See Figure . Check continuity of Gray/Blue wire between terminal No. 2 at EVAP-CPVCSV harness connector and terminal No. 14 at PCM harness connector. See Figure . Continuity should exist. Also check circuit for short to ground and short to voltage. If problem exists, repair as necessary and retest system. If problem does not exist, go to next step.
  3. Disconnect vacuum hoses from EVAP-CPVCSV. See Figure . Disconnect EVAP-CPVCSV harness connector. Apply air pressure to port "A" at EVAP-CPVCSV. See Figure . Air should not flow from port "B". Using fused jumper wires, apply battery voltage and ground between EVAP-CPVCSV terminals (component side). Air should now flow from port "B". If EVAP-CPVCSV operates properly, go to next step. If EVAP-CPVCSV does not operate properly, replace EVAP-CPVCSV.
  4. No problem is indicated at this time. Problem may be intermittent. See TESTING PROCEDURE  under SELF-DIAGNOSTIC SYSTEM.
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