TIAGO AMT Gasoline DTC Troubleshooting Guide Version: 2.0 Date: 06-06-2016 Author: Sathi/Anupama Page: 75 of 424 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. 23. P0932-03: Hydraulic Pressure Sensor Circuit Wrong signal spikes Overview: ISO Code P0932-03 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 spikes are detected in the signal. 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 2500ms 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 - Af the following points by referring TCU parameters using TML diagnostic tool before handing over to customer.
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