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TIAGO/TIGOR AMT Gasoline
DTC Troubleshooting Guide
Version: 4.0
Date: 18-04-2017
Author: Sathi/Anupama
Page: 347 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.
118.
P1401- 07: Level 2 Intervention-Safety input failure
Overview:
ISO Code
P1401- 07
Customer Symptom
Transmission Fault Lamp ON,
No gearshifts ,
Vehicle not cranking,
Vehicle not picking up,
sudden shift to neutral while driving,
engine stopping,
gear shift request by lever disabled
Fault Effects (On Vehicle)
No gearshifts ,
Vehicle not cranking,
Vehicle not picking up,
sudden shift to neutral while driving,
engine stopping,
gear shift request by lever disabled
Lamp Status (If Any)
Transmission Fault Lamp ON
Fault Detection Condition
This fault gets detected after Ignition On if the TCU safety
strategies determine a problem in any safety related inputs.
Normal Operating Condition
TCU safety related inputs function properly
Probable Trouble Area
TCU damage
Healing Condition
Next power OFF after detection of valid heal condition
Component Details:
The Problem may occur due to an internal damage to TCU or any missing input.
Preliminary Checks:
1) Check for other DTC’s present in the AMT system and rectify them first.
2) Check the CAN wiring (pins 25 & 28) and resistance.
3) Check for proper functioning of EMS and Instrument cluster
4) Battery voltage.
5) Check clutch speed and vehicle speed sensor and gear lever connections.
6) Check for damage or back out of pins at TCU connectors.
7) Check for mechanical fitments of the kit and kit components damage (TCU to valve body, clutch lever interface, kit oil
level, clutch sensor etc)
8) Check correct fitment of ground cable connections on vehicle chassis (tightness, corrosion of mounting bolts etc.)
.
Trouble Shooting:-
Step Checks
IF YES
IF NO
1
At the first instance of the fault, clear the
DTC and run the vehicle in all gears for
about 10 kms, does the fault recur?
Go to Step 2
Release the vehicle
to the customer
after final drive test
2
Check Battery and Ignition supplies at pins
1,3and 5 respectively. Both are correct?
Go to Step 3
rectify harness
connections as per
the circuit
schematic
3
Is there any pin back
out/damage/rust/oxidation observed on
TCU Connector?
Clean or repair or replace connector Go to Step4
4
Fault Still Persists?
Go to Step5
Follow the steps
again for
reconfirmation