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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: 702 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.
Trouble Shooting:
Step Checks
IF YES
IF NO
1
Is there wiring harness electrical continuity between ECU
pin 100 & coolant temperature sensor pin 1, ECU pin 99
and Coolant temperature sensor pin 2.
Go to next step
Rectify the wiring
harness
connections as per
the circuit
schematic.
2
Dis-connect the coolant temperature sensor WH connector
and check the resistance cross the two pins of temperature
sensor at 30 deg C. Is resistance ~= 1680 +/- 60 Ohms.
Go to next step
Replace the
coolant
temperature sensor
3
Check whether the ECM pins A100 or A99 are either short
circuited to Battery / Ground.
Rectify the wiring
harness connections
s per the schematic
Go to Next Step
3
Are there any pins backed out from the Coolant
temperature sensor Connector
Rectify/Replace
Connectors
Go to Next Step
4
Are there any pins backed out from the EMS ECU
Connector
Rectify/Replace
Connectors
Go to Next Step
5
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: