Q501 4 Cylinder MT Application DTC Troubleshooting Data Version: 0.1 Date: 21-Sep-2018 Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta Checked By: Yogesh Jadhav Approved By: Satish Kumar P Page: 722 of 1052 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. P0182-11: Fuel Temperature Sensor “A” Circuit Low – Fuel temperature sensor (circuit short to ground) Overview: DTC Description (User Friendly) Fuel temperature sensor (circuit short to Ground) ECU Pin Number K045, K065 Customer Symptom No Obvious symptoms. Only lamp indication Fault Effects (On Vehicle) - Lamp Status (If Any) MIL ON. Fault Detection Condition (Root cause) This fault is logged if ECM received voltage from fuel temperature sensor is less than 0.150 volts. Normal Operating Condition if ECM receives voltage from fuel temperature sensor is in the range of 0.150 Volts to 4.936 volts Probable Trouble Area Wiring Harness connections between the Fuel Temp. Sensor and EMS ECU Fuel Temperature Sensor EMS ECU Healing Condition Rectify the error Clear through diagnostic tool Ignition OFF & ON Component Details: Fuel temperature sensor is NTC resistor which resistance varies according to the fuel temperature i.e. the resistance will decrease as the fuel temperature increase. Vehicle's fuel temperature sensor is the component that tells your engine control unit (ECU) to adjust the amount of fuel it injects. When your fuel is warm, it is less dense and it burns more quickly. On the other hand, when fuel is cold fuel, it is denser and burns slower. Preliminary Checks: 1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above Table. If yes, go ahead with next steps. If not, check for other DTC’s presence. 2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with respect to earlier issue closure. 3. Check for damage of pins / back out of pins at ECU connector / Fuel Filter connector. If found, rectify. 4. Check the wiring harness connections between the Fuel Temperature Sensor and EMS ECU. 5. Check whether the fuel filter is damaged or Leakage of fuel happens at every Ignition ON from fuel filter outlet. If so, confirm that sensor part or its associated WH / Fuel Filter got burnt and replace fuel filter. Trouble Shooting: Step Checks IF YES IF NO 1 Check the Electrical Continuity between the Fuel Temperature sensor (WH Connections part of Fuel filter connector) and EMS ECU. For pin details, refer schematic section below. Go to next step Rectify the wiring harness connections as per the circuit schematic. 2 Are there any pins damaged at EMS ECU Connector Replace the connector or wiring Go to Next Step
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