NEXON AMT BS VI DTC Troubleshooting Guide Version: 2.3 Date: 23-07-2019 Author: Rahul N Page: 413 of 442 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. 141. P174F-02: Clutch Closed position Self-tune – Max_type_Error Overview: ISO Code P174F-02 Customer Symptom Transmission Fault Lamp ON, Fault Effects (On Vehicle) Clutch slippage, Loss of power when gas pedal is pressed Lag in vehicle response, Lamp Status (If Any) Transmission Fault Lamp ON Fault Detection Condition This fault gets detected during normal operation or driving condition ,if TCU detects that the Clutch closed position is outside the maximum defined thresholds (Design specification) Normal Operating Condition Clutch closed position learning happens continuously whenever SW conditions satisfy with clutch is in closed state Probable Trouble Area Clutch assembly / Sensor / Hardware failure Healing Condition 1s after detecting proper clutch closed position by system Component Details: Clutch Closed position learning is automatically performed by TCU when clutch is in closed condition, it is required to detect maximum resting position of clutch during vehicle life cycle in order to achieve same vehicle performance throughout. Preliminary Checks: 1) Before proceeding with rectification, ensure no other DTC in TCU. If there are any other DTC’s they must be rectified first. 2) Check the vehicle running behavior like clutch slippage, vehicle driving condition 3) Check the Clutch position values during different operation like stand-still, Creeping, Pickup, Closed position, etc., 4) Visibly check for damage/mis-assembly of clutch actuator/components 5) Visibly check for any damage to kit/oil leakage/other kit components. 6) Check for loose fitting TCU/EMS/ and clutch position sensor connectors 7) Check correct fitment of ground cable connections on vehicle chassis. Trouble Shooting:- Step Checks IF YES IF NO 1. Connect the TCU diagnostic tool and check for active DTC’s, are there any active DTC’s other than P174F/02? Rectify the other DTC’s first. After clearing DTC’s, run the procedure again. Recheck from step 1 Go to Step 2 2 Check for vehicle running behavior (Creep, pickup, gearshifts, etc.,) Go to Step 3 If Grid selflearning failed with error code 0E Go to Step 4 If other error codes refer DTC P1844 3 Check Clutch Sensor, Clutch actuator, Kit visibly from outside If there is any damage or problem found please rectify Go to Step 4 4 a>Check the AMT Clutch lever interface Replace/Rectify the problematic clutch/component Replace the relevant component
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