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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: 764 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.
P246F-64: Exhaust Gas Temperature sensor Circuit Range / Performance Bank 1 Sensor 4 – Outlet Diesel
Particulate Filter exhaust gas temperature sensor plausibility
Overview:
DTC Description (User Friendly)
Outlet Diesel Particulate Filter exhaust gas temperature sensor
plausibility
ECU Pin Number
K047, K050
Customer Symptom
MIL ON, CEL OFF. Torque Loss
Fault Effects (On Vehicle)
Torque Loss, DPF Regen Off.
Lamp Status (If Any)
MIL ON, CEL OFF
Fault Detection Condition (Root cause)
The temperature of sensor at Outlet DPF (T6) position is
compared with all other temperature values (T3, T4 and T5 sensor
values) and if the value is showing non-plausibility with all other
sensor. Then the corresponding DTC is Set
Normal Operating Condition
No fault
Probable Trouble Area
Wiring Harness connections between Inlet DPF Temperature
sensor and EMS ECU
Outlet DPF Temperature sensor
Engine Management System
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
The outlet DPF temperature sensor is based on a PTC sensitive element, placed inside the sensor body; the resistance
decreases/increase as the air temperature increases, according to its specific characteristics. The PTC resistance value,
in combination with ECU interface, gives an output voltage proportional to temperature changes.
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 / Outlet DPF temperature sensor connector. If
found, rectify.
4. Check the wiring harness connections between the Outlet DPF temperature sensor and EMS ECU.
Trouble Shooting:
Step Checks
IF YES
IF NO
1
Check the Electrical Continuity between the DPF Outlet
temperature sensor 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