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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: 680 of 1052
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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.
P083F-62: Clutch Pedal Switch “A”/”B” Correlation – Two digital clutch switches not plausible
Overview:
DTC Description (User Friendly)
Two digital clutch switches not plausible
ECU Pin Number
K052, K012
Customer Symptom
CEL ON, Cruise Control will be disabled
Fault Effects (On Vehicle)
Cruise Control will be disabled
Lamp Status (If Any)
MIL OFF, CEL ON
Fault Detection Condition (Root cause)
When Clutch pedal is pressed fully, EMS receives the Clutch
Bottom travel input before the top travel input.
Or
EMS receives the Clutch bottom travel input but not the top
travel input.
Normal Operating Condition
When Clutch pedal is pressed fully, EMS receives the Clutch
top travel input first and then bottom travel input.
When clutch fully pressed, clutch top travel and bottom travel
inputs are active.
Probable Trouble Area
WH connections between EMS ECU and Clutch Pedal sensor
connector.
Clutch position sensor
EMS ECU
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
Clutch position sensor is a hall effect based sensor which provides two digital inputs to EMS ecu. First input is top travel
input – which implies clutch pedal is pressed 40% another input is Clutch bottom travel input – which implies clutch pedal
is pressed 90%.
Clutch 40% input will be used for Vehicle drivability refinements and Clutch 90% input will be used for Vehicle start, CGD
and GSI functions.
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If
yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
earlier issue closure.
3. Check for any other faults presence related to ECU Internal power supplies; Follow rectification process for those
faults, before proceeding further.
4. Check for Wiring Dis-continuity between Clutch position sensor & EMS ECU. If found, fix them
5. Check whether the Clutch top travel input to ECM is open circuited.
6. Check whether the Clutch position sensor is receiving power supply and ground.