TIAGO

TIAGO AMT Gasoline

DTC Troubleshooting Guide

Version: 2.0

Date: 06-06-2016

Author: Sathi/Anupama

Page: 356 of 424

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.

122.

P080A -07: Kiss point Selftuning Procedure Error

Overview:

ISO Code

P080A -07

Customer Symptom

Transmission Fault Lamp ON,

Vehicle moving only in 1

or reverse gear.

Fault Effects (On Vehicle)

Vehicle moving only in 1

or reverse gear.

Lamp Status (If Any)

Transmission Fault Lamp ON

Fault Detection Condition

This fault gets detected after Ignition On if TCU detects that

the Clutch kiss point self tuning service procedure has not

been done or not successfully completed

Normal Operating Condition

Clutch kiss point self tuning Procedure is successfully

completed at End of line or after service part replacements

(refer service manual) that require such procedure.

Probable Trouble Area

Wrong execution conditions /Wiring Harness Connections /

TCU

Healing Condition

Immediately after detection of valid Self tuning procedure

completion.

Component Details:

Clutch kiss point self tuning procedure is Run through a diagnostic or End of line tool, it is required by the TCU to learn the

position of clutch kiss point (clutch position at which it starts transmitting torque).

Preliminary Checks:

1) Before proceeding with rectification, ensure no other DTC in TCU except from a set of P1844,P080A, and P185B. If

2) Before re-initiating the procedure check the following conditions:

a> Ignition key is ON

b> Transmission in neutral

c> Healthy battery

d> Engine is ON

e> Vehicle speed is 0

f> Check correct hydraulic pressure with diagnostic tool (38-51 bar)

g> Grid Self tuning procedure is complete (check with diag. tool

Selflearned Mask

and confirm that variable

is TRUE else refer DTC P1844 first)

Engine Idle speed is in expected range.

3) Check for damage or back out of pins at TCU connector.

4) Visibly check for any damage to electro valves/oil leakage/other kit components.

5) Check for loose fitting TCU/EMS/24 pin inter-harness and clutch position/clutch speed sensor connectors

6) Check correct fitment of ground cable connections on vehicle chassis.

Trouble Shooting:-

Step Checks

IF YES

IF NO

Connect the TCU diagnostic tool and check

other than the current one?

procedure again.

Recheck from step 1

Go to Step 2

Initiate the Clutch kiss point selftuning

procedure with the diagnostic tool, wait for ~

1 minutes and ask for routine result.

Check for the below responses and steps to

follow:

-> Goto Step 3

-> Goto Step 4