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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: 963 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.
schematic.
2
Are there any pins damaged at EMS ECU Connector
Replace the
connector or wiring
harness
Go to Next Step
3
Are there any pins backed out from the EMS ECU
Connector
Rectify/Replace
Connectors
Go to Next Step
4
Check whether any of the Exhaust gas temperature sensor
(Inlet catalyst – T4 Sensor) pins A056, A055 are short-
circuited to Battery / Ground.
Rectify the wiring
Harness
Connections
Go to Next Step.
5
Dis-connect Exhaust gas temperature sensor (Inlet catalyst
– T4 Sensor) from vehicle and check as below. At 25
degrees of ambient temperature, measure the resistance
across the sensor, it shall be ~ 220 Ohms.
Go to next step
Call Hotline for
assistance in
deciding whether
Exhaust gas
temperature sensor
(Inlet catalyst – T4
Sensor) has to be
replaced.
6
Fault Persists.
Call Hotline for
assistance in
deciding whether
Exhaust gas
temperature sensor
(Inlet catalyst – T4
Sensor) has to be
replaced.
Go to next step
7
Fault persists
Call Hotline
Repeat the above
steps for re-
confirmation
DTC’s confirmation:
After rectification, Test Drive the vehicle for 2 KM and ensure that no DTC’s are logged in ECM.
Circuit Schematic: