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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 69 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1444: EVAP Canister Purge Volume Control Solenoid Valve >> Diagnostic Procedure (2.4L)

Diagnostic Procedure (2.4L)

WARNING: This page is about a different car, the 2002 Nissan Xterra and 2002 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect EVAP-CPVCSV harness connector. See Figure . Turn ignition on. Measure voltage between ground and EVAP-CPVCSV harness connector terminal No. 2 (Black/Pink wire). If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short between EVAP-CPVCSV, ECM relay and ECM.
  2. Turn ignition off. Disconnect ECM harness connector. See Figure or Figure . Check continuity of Red/Yellow wire between EVAP-CPVCSV harness connector terminal No. 1 and ECM harness connector terminal No. 5. See Figure . Also, check circuit for short to ground and short to voltage. If problem is found, repair as necessary. If problem is not found, go to next step.
    3. CAUTION: Replace EVAP-CSPS if it has been dropped from a height of more than 20" (.5 m) onto a hard surface such as concrete.
    CAUTION: DO NOT use ECM ground terminals when measuring voltage.
  3. Remove EVAP-CSPS with its harness connector connected. Turn ignition on. Measure voltage between ground and ECM terminal No. 88 (White wire) by backprobing. Voltage should be 3.2-4.8 volts. Apply 7.87 in. Hg of vacuum to EVAP-CSPS. Voltage should be 1.0-1.4 volts less than voltage measured with no vacuum applied. If voltage is as specified, go to next step. If voltage is not as specified, replace EVAP-CSPS.
  4. If using CONSULT-II, go to next step. If not using CONSULT-II, go to step  6 .
  5. Reconnect all harness connectors. Start engine. Perform PURG VOL CONT/V in ACTIVE TEST mode with CONSULT-II. Engine speed should vary according to valve opening. If operation is as specified, go to step  7 . If operation is not as specified, go to next step.
  6. Remove EVAP-CPVCSV. Using jumper wires, apply battery voltage between EVAP-CPVCSV terminals. See Figure . Check for airflow between ports "A" and "B". Air should flow. Remove jumper wires. Air should not flow. If operation is as specified, go to next step. If operation is not as specified, replace EVAP-CPVCSV.
  7. Remove EVAP-CVCV. Check for rust in port "B". See Figure . If rust exists, replace EVAP-CVCV. If rust does not exist, go to next step.
  8. If using CONSULT-II, go to next step. If using generic scan tool, go to step  10 .
  9. Reconnect all harness connectors. Turn ignition on. Perform VENT CONTROL/V in ACTIVE TEST mode with CONSULT-II. When VENT CONTROL/V is ON, air should not flow between ports "A" and "B". When VENT CONTROL/V is OFF, air should flow between ports "A" and "B". It should take less than one second for valve to open or close. If operation is as specified, go to step  11 . If operation is not as specified, clean EVAP-CVCV with compressed air, and retest. If operation is still not as specified, replace EVAP-CVCV.
  10. Using jumper wires, apply battery voltage to EVAP-CVCV terminals. See Figure . Air should not flow between ports "A" and "B". Remove jumper wires. Air should flow. EVAP-CVCV should switch in less than one second. If operation is as specified, go to next step. If operation is not as specified, clean EVAP-CVCV with compressed air, and retest. If operation is still not as specified, replace EVAP-CVCV.
  11. Remove EVAP canister with EVAP-CVCV attached. Attempt to drain water from EVAP canister. If water does not drain from EVAP canister, go to step  13 . If water drains from EVAP canister, weigh EVAP canister with EVAP-CVCV attached. If weight is more than 4.0 lbs. (1.8 kg), go to next step. If weight is less than 4.0 lbs. (1.8 kg), go to step  13 .
  12. Inspect EVAP canister for damage. Replace, if necessary. Also, check hose between water separator and EVAP canister for blockage or poor connection. If problem is found, repair as necessary. If problem is not found, go to next step.
    13. CAUTION: DO NOT disassemble water separator.
  13. Remove water separator and inspect for cracks or blockage. With water separator port "A" plugged, blow air into port "B". See Figure . Air should flow out of port "C". With port "C" plugged, blow air into port "B". Air should flow out of port "A". If operation is as specified, go to next step. If operation is not as specified, replace water separator.
  14. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
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