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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: 941 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.
3
Are there any pins damaged at EMS ECU Connector
Replace the
connector or wiring
harness
Go to Next Step
4
Are there any pins backed out from the EMS ECU
Connector
Rectify/Replace
Connectors
Go to Next Step
5
Measure the AC Relay Coil Inductance value and check
whether it is above than 30 mH.
Replace AC Relay
Go to Next Step
6
Measure the flyback voltage appearing at ECM pin K090
when AC relay is turned Off. Is the voltage > 20 V?
Replace AC Relay
Go to Next Step
6
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.
Perform the IO / Actuator Test for AC Relay. Test shall be successful.
Circuit Schematic:
Component Location & Image:-
NA
Connector View & Information: -
NA