187 / 4910
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: 155 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.
P3014-23: Economy and sport modes switch struck detection
Overview:
DTC Description (User Friendly)
Economy and sport modes switch struck detection
ECU Pin Number
K034 – Input signal to EMS from ECO Mode Switch
K051 – Input signal to EMS from Sports Mode Switch
Customer Symptom
MIL OFF, CEL ON. Engine will run in default normal / City
mode.
Fault Effects (On Vehicle)
Engine will run in default normal / City mode.
Lamp Status (If Any)
CEL ON. CEL Turns Off as and when fault condition is not
present / healed.
Fault Detection Condition (Root cause)
When the Eco switch and sport switch is struck for a time
greater than debounce time.
Normal Operating Condition
Sports Mode and Economy mode functions as per design
intention.
Probable Trouble Area
Wiring harness connections, Sports mode switch, Eco mode
switch, EMS ecu.
Healing Condition
After 3 drive cycles of fault rectification.
Component Details:
Sports / Economy mode switch is a Normally Open - latchable rotary Switch. Whose electrical contacts will be closed
when the rotary Switch is rotated to specific positions.
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above
Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with
respect to earlier issue closure.
3. Check whether the contacts of the Drive mode switch are stuck closed.
4. Check for damage of Drive mode switch connector / EMS ECU connector.
5. Check for damage of Drive Mode switch pins / EMS ECU pins.
Trouble Shooting: