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TIAGO/TIGOR AMT Gasoline
DTC Troubleshooting Guide
Version: 4.0
Date: 18-04-2017
Author: Sathi/Anupama
Page: 98 of 427
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.
29.
P0715 -01: Clutch Speed Sensor Circuit– Signal Wrong
Overview:
ISO Code
P0715-01
Customer Symptom
Transmission Fault Lamp ON,
Vehicle not shifting above 2
nd
gear,
vehicle shifting automatically to Neutral sometime after drive
is requested by Lever,
no gearshift (if other critical faults are also present in system)
Fault Effects (On Vehicle)
Transmission Fault Lamp ON,
Vehicle not shifting above 2
nd
gear,
vehicle shifting automatically to Neutral sometime after drive
is requested by Lever,
no gearshift (if other critical faults are also present in system)
Lamp Status (If Any)
Transmission Fault Lamp ON
Fault Detection Condition
This fault gets detected after Ignition On if the clutch speed is
detected to be incorrect in correlation with engine speed.
Normal Operating Condition
Clutch speed is expected to be close to engine speed in
clutch connected condition and clutch speed values are
expected to follow smooth trend.
Probable Trouble Area
Wiring Harness Connections / Sensor / TCU
Healing Condition
2000 milliseconds after valid sensor signal
Component Details:
The Clutch speed sensor is a variable reluctance pickup sensor mounted in the gearbox, which outputs a number of pulses
per rotation. Based on the frequency, clutch speed is determined by the TCU.
Preliminary Checks:
1) Loose/ Damaged Connections between Sensor and TCU.
2) Visually check sensor mounting & Air gap, proper tightening of mounting screws and any visible damage.
3) Check for damage or back out of pins at Clutch speed sensor connector and TCU connector.
4) Check correct fitment of ground cable connections on vehicle chassis.
Trouble Shooting:-
Step Checks
IF YES
IF NO
1.
Is there any rust/oxidation observed on
Sensor or TCU Terminals?
Clean the Rust or repair or
replace
Go to Step 2
2.
Is there wiring harness electrical continuity
between TCU pins 5 and 6 (12 pin system
connector) to clutch sensor connector pins 2
and 1 respectively?
Go to Step 3
Establish continuity by
rectifying harness
connections as per the
circuit schematic
3.
Are there any pins damaged at Sensor, or
TCU Connector?
Repair/Replace the
problematic part
Go to step 4
4
Are TCU Sensor Signal pins 5 and 6 (12 pin
system connector) Short circuited to
GND/Battery?
Repair the harness as per
the schematic
Go to Step 5
5
Are there any pins backed out from the
Sensor or TCU Connector?
Rectify/Replace Connectors Go to Step 6
6
Is sensor wire cladding properly grounded?
Go to Step 7
Check cladding
connection and rectify /
replace the sensor
7
Fault Still Persists?
Replace Sensor, if fault
persists Replace TCU
Follow the steps again for
reconfirmation
DTC’s confirmation:-