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TIAGO/TIGOR AMT Gasoline
DTC Troubleshooting Guide
Version: 4.0
Date: 18-04-2017
Author: Sathi/Anupama
Page: 72 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.
22.
P0932-07: Hydraulic Pressure Sensor Circuit– Wrong value sensor
Overview:
ISO Code
P0932-07
Customer Symptom
Transmission Fault Lamp ON,
Creeping inactive,
Transmission going automatically to neutral from gear when coming to halt after
drive.
Repeated pump activation (buzzing sound)
Fault Effects (On Vehicle)
Creeping inactive,
Transmission going automatically to neutral from gear when coming to halt after
drive.
Repeated pump activation
No EOL self-tuning.
Lamp Status (If Any)
Transmission Fault Lamp ON
Fault Detection Condition
This fault gets detected after Ignition On when the Engine is not cranking and
Sensor & battery Supply voltage is in proper range and a wrong constant value
of the signal is detected wrt estimation of the oil flow.
Normal Operating
Condition
Hydraulic Pressure signal will be in a valid range (Approx. 38-51 bar)
corresponding to operating conditions of the kit.
Probable Trouble Area
Loose mechanical fitment of TCU/ Sensor loose/damage/short (internal)/ TCU
internal damage
Healing Condition
2000ms after getting valid sensor signal
Component Details:
The Hydraulic Pressure sensor is an Analog type sensor which outputs a voltage in proportion to the hydraulic pressure of the
kit Oil. It is an internal component to the AMT kit which is mounted on the valve body and makes internal electrical contact with
the TCU..
Preliminary Checks:
1) If this DTC occurs in combination with DTC P1852, refer remedy for P1852.
2) Loose/ Damaged mechanical fitments of TCU (TCU to valve body mounting).
3) Check for any visible damage to TCU.
4) Check correct fitment of ground cable connections on vehicle chassis.
Trouble Shooting:-
On first occurrence, clear the DTC and drive the vehicle for 2-3 kms, read the DTC again. On fault confirmed again, follow
below steps.
Step Checks
IF YES
IF NO
1.
Unmount and remove the TCU from the valve
body. Inspect the condition of the Hydraulic
sensor(OPS) (refer fig below). Is the sensor and
pins visibly undamaged?
Go to Step 2
Replace the sensor/TCU.
2.
Inspect the sensor connector on TCU main
board for loose fit/disconnection/pin damage. Is
the sensor connected properly?
Go to Step 3
Fit the sensor back
properly.
If sensor connector
damage then replace the
TCU.
3. Replace the TCU
DTC’s confirmation:-
After rectification, clear all DTC’s and ensure the following points by referring TCU parameters using TML diagnostic tool
before handing over to customer.