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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Instrument Panel - Analog - F150 Pickup (CNG)) >> System Tests >> Test F: Tank Temperature Sensor Circuit Short To Ground (DTC B1225)

Test F: Tank Temperature Sensor Circuit Short To Ground (DTC B1225)

WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After making any repairs, clear DTCs and retest system.
  1. Turn ignition switch to LOCK position. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below center of instrument panel, right of steering column. Turn ignition switch to RUN position. Access PID/DATA MONITOR AND RECORD. Select Natural Gas Vehicle Module (NGVM) PID TEMPS1. If temperature is 199°F, go to next step. If temperature is not 199°F, inspect for loose, damaged or corroded harness connectors and harness connector terminals. Clear DTCs. Test system for normal operation. If DTC B1225 is retrieved again, go to step  4.
  2. Turn ignition switch to LOCK position. Disconnect NGVM harness connector C1009. NGVM is located on center radiator support behind radiator. Disconnect fuel tank temperature sensor harness connector C4128. Fuel tank temperature sensor is located in rear of in-bed fuel tank solenoid valve. Measure resistance at NGVM harness connector C1009 between terminals No. 40 (Black/Yellow wire) and No. 47 (Light Green/Red wire). If resistance is more than 5 ohms, go to next step. If resistance is 5 ohms or less, repair short to ground in Brown wire between NGVM and fuel tank temperature sensor. See WIRING DIAGRAMS .
  3. Measure resistance at NGVM harness connector C1009 between terminal No. 46 (Brown wire) and No. 47 (Light Green/Red wire). See Figure. If resistance is 5 ohms or less, repair short between Light Green/Red wire and Brown wire. See WIRING DIAGRAMS . If resistance is more than 5 ohms, replace tank temperature sensor. See TANK TEMPERATURE SENSOR  under REMOVAL & INSTALLATION.
  4. Disconnect NGVM harness connector C1009. NGVM is located on center radiator support behind radiator. Inspect for pushed out terminals and corrosion. Reconnect NGVM harness connector, ensuring it is connected correctly. Operate system and verify if concern still exists. If concern still exists, replace NGVM. See NATURAL GAS VEHICLE MODULE  under REMOVAL & INSTALLATION. If concern does not exist, system is operating correctly at this time. Clear DTCs and repeat self-test.
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