P0182-FUEL TEMPERATURE SENSOR CIRCUIT LOWFor a complete wiring diagram Refer to Section 8WWhen Monitored:With the ignition on.Set Condition:The (K156) Fuel Temperature Sensor Signal circuit voltage is below 0.13 volt for 0.5 second.
Possible CausesINTERMITTENT DTC(K156) FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND(K156) FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO (K914) FUEL TEMPERATURE SENSOR GROUND(K156) FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCEFUEL TEMPERATURE SENSORENGINE CONTROL MODULE (ECM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)Diagnostic Test1.DTC IS ACTIVEIgnition on, engine not running.With the scan tool, Clear DTCs in the Engine Control Module (ECM).Monitor the scan tool for at least two minutes.Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.Start the engine.Allow the engine to reach normal operating temperature.With the scan tool, select View DTCs.Is the status Active for this DTC?YesGo To 2NoRefer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.(Refer to 9 - ENGINE - DIAGNOSIS
AND TESTING)2.FUEL TEMPERATURE SENSORTurn the ignition off.Disconnect the Fuel Temperature Sensor harness connector.Turn the ignition on.With the scan tool, clear DTCs.With the scan tool, select View DTCs.The scan tool should display a Fuel Temperature Sensor high voltage or open circuit DTC with the Fuel Temperature Sensor connector disconnected.Does the scan tool display the DTC(s) as described above?YesReplace the Fuel Temperature Sensor in accordance with the service information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo to 33.(K156) FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUNDTurn the ignition off.Disconnect the Engine Control Module (ECM) harness connector.Measure the resistance between ground and the (K156) Fuel Temperature Sensor Signal circuit in the Fuel Temperature Sensor harness connector.Is the resistance above 1000 ohms?YesGo to 4NoRepair the (K156) Fuel Temperature Sensor Signal circuit for a short to ground.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)4.(K156) FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO (K914) FUEL TEMPERATURE SENSOR GROUND CIRCUITMeasure the resistance between the (K156) Fuel Temperature Sensor Signal circuit and the (K914) Fuel Temperature Sensor Ground circuit in the Fuel Temperature Sensor harness connector.Is the resistance above 1000 ohms?YesGo to 5NoRepair the (K156) Fuel Temperature Sensor Signal circuit for a short to the (K914) Fuel Temperature Sensor Ground circuit.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)5.(K156) FUEL TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN CIRCUIT OR HIGH RESISTANCEMeasure the resistance of the (K156) Fuel Temperature Sensor Signal circuit between the Fuel Temperature Sensor harness connector and the Engine Control Module (ECM) harness connector.Is the resistance below 10.0 ohms?YesGo to 6NoRepair the (K156) Fuel Temperature Sensor Signal circuit for an open circuit or high resistance.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)6.ENGINE CONTROL MODULE (ECM)Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Temperature Sensor and the Engine Control Module (ECM).Look for any chafed, pierced, pinched, or partially broken wires.Look for broken, bent, pushed out or corroded terminals.Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.Look for the data to change or for the DTC to reset during the wiggle test.Refer to any Technical Service Bulletins that may apply.Were any problems found?YesRepair as necessary.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace the Engine Control Module (ECM) in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)