663 / 4910
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: 631 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.
P24C2-62: Exhaust Gas Temperature Measurement System – Multiple Sensor Correlation Bank 1 – Exhaust gas
temperature for cold start condition 2 (signal compare failure)
Overview:
DTC Description (User Friendly)
Exhaust gas temperature for cold start condition 2 (signal compare
failure)
ECU Pin Number
K047, K050, A056, A055, A075, A074, A013, A012.
Customer Symptom
MIL ON, CEL OFF. Torque Reduction active, DPF Regeneration
Off.
Fault Effects (On Vehicle)
Torque Reduction Active.
Lamp Status (If Any)
MIL ON, CEL OFF.
Fault Detection Condition (Root cause)
If No exhaust temperature sensor detects non plausibility with all
other exhaust temperature sensors and non plausibility is detected
between few sensor and it not clear which sensor is wrong
Normal Operating Condition
No fault
Probable Trouble Area
Wiring Harness connections between Exhaust Temperature
sensors (T3 /T4 / T5 / T6 Sensor) and EMS ECU
T3/T4/T5/T6 Temperature sensors
Engine Management System
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
The 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 / Exhaust temperature sensor (T3/T4/T5/T6
Sensor) connector. If found, rectify.
4. Check the wiring harness connections between the Exhaust temperature sensor (T3/T4/T5/T6 Sensor) and EMS
ECU.
Trouble Shooting:
Step Checks
IF YES
IF NO
1
Check the Electrical Continuity between Exhaust
temperature sensor (T3/T4/T5/T6 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
Go to Next Step