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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: 426 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.
The error is detected when the VSensing feedback signal
remains low and engine speed is greater than a
calibratable speed 0.
Replace the
connector or wiring
Harness.
Go to step 2.
2.
Check the continuity between pin K085 of EMS and battery
positive. If continuity is there then there is short circuit to
battery.
There is a short
circuit in the harness
and perform repairs
accordingly.
Go to step 3.
3.
Are there any pins damaged at EMS ECU Connector.
Replace the
connector or wiring
Harness.
Go to step 4.
4.
Are there any pins backed out from the EMS ECU
Connector.
Rectify/Replace
Connectors.
Go to Step 5.
5.
If fault still persists.
then replace sensor
and if fault still
persists then call
Hotline.
Follow the above
procedure again for
Reconfirmation.
TC’s confirmation
(checks before handing over vehicle to customer)
:
1. Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds also.
2. If error present, then rectify the errors.
3. Confirm that there is no error logged in EMS before handing over vehicle to customer.
Circuit Schematic:
EMS Output to starter relay
High side
Starter Motor
Relay
Input signal to EMS ECU from
VSensing sensor
Starter
Motor
K072
K055
K085
EMS ECU