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.
- Turn ignition off. Disconnect EVAP Canister Vent Control Valve (EVAP-CVCV) harness connector. See Figure . Turn ignition on. Measure voltage between ground and terminal No. 1 (Purple wire) at EVAP-CVCV harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short in purple wire between EVAP-CVCV and fuse box, the retest system.
- Turn ignition off. Disconnect PCM harness connector. See Figure . Check continuity of Blue/Yellow wire between terminal No. 2 at EVAP-CVCV harness connector and terminal No. 102 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.
- Check vacuum hose connected to EVAP-CVCV for damage and blockage. If problem exists, replace as necessary and retest system. If problem does not exist, go to next step.
- Remove EVAP-CVCV. Check EVAP-CVCV for rust and damage. Rust should not exist in port "B". See Fig 1 . If problem exists, replace EVAP-CVCV. If problem does not exist, go to next step.
- Using fused jumper wires, apply battery voltage and ground between EVAP-CVCV terminals (component side). See Fig 1 . Air applied to port "A" should not flow from port "B". Remove jumper wires. Air applied to port "A" should now flow from port "B". If EVAP-CVCV operates as specified, go to next step. If EVAP-CVCV does not operate as specified, replace EVAP-CVCV and retest system.
- No problem is indicated at this time. Problem may be intermittent. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM.