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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Engine Controls Self-Diagnostics - Pathfinder & QX4) >> Diagnostic Tests >> DTC P0182: Fuel Tank Temperature Sensor - Low Input Or DTC P0183: Fuel Tank Temperature Sensor - High Input >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Pathfinder and 2002 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove access cover under rear seat. Disconnect fuel level sensor/pump 4-pin harness connector. Turn ignition on. Measure voltage between ground and fuel level sensor/pump harness connector terminal No. 1 (Green/Black wire). See Figure . Voltage should be about 5 volts. If voltage is as specified, go to step  3 . If voltage is not as specified, go to next step.
  2. Check for poor, loose, corroded or damage to terminal connections in in-line harness connectors. Check for open or shorts between ECM and fuel level sensor/pump unit. See WIRING DIAGRAMS article. If problem is found, repair as necessary.
  3. Turn ignition off. Check for continuity between ground and fuel level sensor/pump unit terminal No. 2 (Black wire). See Figure . Also, check circuit for short to voltage. If problem is found, repair as necessary. If no problem is found, go to next step.
  4. Remove fuel level sensor/pump assembly. See FUEL SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article. Access cover is located under rear seat. Measure resistance between fuel level sensor/pump unit harness connector terminals No. 1 and 2, with FTT sensor submerged in heated water. See Figure . Resistance should be within acceptable range shown in illustration. See Figure . If resistance is as specified, go to next step. If resistance is not as specified, replace fuel level sensor/pump unit.
  5. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
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