Diagnostic Procedure
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.
- Turn ignition off. Disconnect EVAP-CVCV harness connector. See Figure. Turn ignition on. Measure voltage between ground and EVAP-CVCV harness connector terminal No. 2 (Blue/Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short circuit and retest system. See WIRING DIAGRAMS article.
- Turn ignition off. Disconnect ECM harness connector. See Figure. Check continuity of Light Green/Black wire between EVAP-CVCV harness connector terminal No. 1 and ECM harness connector terminal No. 108. See Figure. Also, check circuit for short to ground and short to voltage. Repair circuit as necessary and retest system. If circuit is okay, 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 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 does not operate as specified or operation takes more than one second, go to next step. If EVAP-CVCV operates as specified, go to step 6.
- Clean EVAP-CVCV ports with compressed air. Repeat step 4. If EVAP-CVCV still does not operate as specified, replace EVAP-CVCV and retest system. If EVAP-CVCV operates as specified, test is complete.
- No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.