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 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. 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.
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