536 / 561
TIAGO/TIGOR AMT Gasoline
DTC Troubleshooting Guide
Version: 4.0
Date: 18-04-2017
Author: Sathi/Anupama
Page: 402 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.
137.
P1986-07 Variant code procedure not completed
Overview:
ISO Code
P1986-07
Customer Symptom
Transmission fault lamp is ON
Vehicle not cranking
Fault Effects (On Vehicle)
Vehicle cranking is disabled
Lamp Status (If Any)
Transmission fault lamp is ON
Fault Detection Condition
This fault gets detected after Ignition On if TCU detects that
the Variant Coding service procedure has not been done or
not successfully completed
Normal Operating Condition
Variant Coding Procedure is successfully completed at End of
line or after service part replacements (refers service manual)
that require such procedure.
Probable Trouble Area
Wrong execution conditions/Wiring Harness Connections /
TCU
Healing Condition
Immediately after detection of valid Variant Coding procedure
Completion.
Trouble Shooting:-
P1986-07
-Variant code procedure not completed
Start
Connect the diagnostic tool
and Read DTC
Is P1986-07 DTC
in current state?
Clear DTC
No
Execute Variant
coding
Yes
Stop