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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: 408 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.
Are Relay Contacts weld / Stuck open?.
Replace the Relay
Go to Step 2
2.
Is there wiring harness electrical continuity between ECU
pin K72 & Starter relay coil pin X. Also Check continuity
between the Main Relay supply and the relay Coil pin X
and
Battery supply to Crank Inhibit relay contact pin X.
Go to Step 3
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
3.
ECU pin K72 short to supply?
Repair the harness
as per the
schematic
Go to step 4
4
Is relay getting Supply
Go to Step 5
Repair the harness
as per the
schematic
6
Fault Still Persists?
Replace relay and
then if Fault still
persists then call
hotline.
Follow the steps
again for
reconfirmation
DTC’s confirmation:
Press the clutch fully & then start the engine
Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds as wellM.
Circuit Schematic:
EMS ECU