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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