Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 376 of 610 Copyright by TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without our consent Trouble Shooting: Step Checks IF YES IF NO 1 Is there any rust/oxidization observed on Sensor Terminals Clean the Rust or repair or replace Go to next step 2 Is there wiring harness electrical continuity between ECU pins A55, A07, A14 & AC pressure Sensor connector pins 1, 2, 3. Go to next step Establish continuity by rectifying harness connections as per the circuit schematic 3 Are there any pins damaged at Sensor/EMS ECU Connector Replace the connector or wiring harness Go to next step 4 Are there any pins backed out from the Sensor/EMS ECU Connector Rectify/Replace Connectors Go to next step 5 Is Sensor Supply pin A55, Short circuited to GND/Battery. Repair the harness as per the schematic Go to next step 6 Is Sensor Signal Pin A07, Short circuited to GND/Battery. Repair the harness as per the schematic Go to next step 7 Is sensor physically Damaged Replace Sensor Go to next step 8 Fault Still Persists? Call Hotline. Follow the steps again for reconfirmation DTC’s confirmation: After rectification, ensure the following points before handing over to customer. Measure the AC refrigerant pressure, AC refrigerant pressure shall be in the range of 2 to 32 bar. Ensure that no faults are logged in EMS before handing over vehicle back to customer
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