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TIAGO/TIGOR AMT Gasoline
DTC Troubleshooting Guide
Version: 4.0
Date: 18-04-2017
Author: Sathi/Anupama
Page: 90 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.
27.
P0825 -01: Gear Lever Sensor Circuit– Misuse
Overview:
ISO Code
P0825-08
Customer Symptom
Transmission Fault Lamp ON,
Creeping inactive,
Transmission going automatically to neutral from gear when
coming to halt after drive.
Vehicle not cranking
Fault Effects (On Vehicle)
Creeping inactive,
Transmission going automatically to neutral from gear when
coming to halt after drive.
Vehicle not cranking
Lamp Status (If Any)
Transmission Fault Lamp ON
Fault Detection Condition
This fault gets detected after Ignition On if the gear lever is
locked in an unstable position (tapup/tapdn) for a long
duration
Normal Operating Condition
Unstable positions are expected for only a brief durations
Probable Trouble Area
Wiring Harness Connections / Sensor / TCU
Healing Condition
1500 milliseconds after valid sensor signal
Component Details:
The Gear Lever outputs four hall sensor signals which encode the position of the Gear lever.
Preliminary Checks:
1) Loose/ Damaged Connections between Sensors and TCU.
2) Check for damage or back out of pins at Gear lever connector and TCU connector.
3) Check correct fitment of ground cable connections on vehicle chassis.
4) Check mechanical operation of gear shift lever (latching at each position R/N/A/M), specifically check for play or
looseness in lever operation.
Trouble Shooting:-
Step Checks
IF YES
IF NO
1
Check the movement of the gear lever from “M” position to
“+” and “-“ positions, ensure that the lever returns with
spring action back to “M” position without getting stuck at
these positions. Is the lever getting stuck sometimes?
See if there is any
object/deposit stuck
in the lever inhibiting
free movement,
clean it, if internal
damage to lever
then replace it.
Go to Step 2
2
Is there any rust/oxidation observed on Sensor Terminals
(GSL connector)
Clean the Rust or
repair or replace
Go to Step 3
3
Is there wiring harness electrical continuity between TCU
pins to GSL Lever connector pins.
Go to Step 4
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
4
Are there any pins damaged at GSL lever connector or
TCU Connector
Replace the
connector or wiring
harness.
Go to step 5
5
Are there any pins backed out from the GSL lever or TCU
Connector
Rectify/Replace
Connectors
Go to Step 6