Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 515 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent Trouble Shooting: Step Checks IF YES IF NO 1 Is Blower position detection module present? Go to next step Fit the proper modules and check 2 Is Blower position detection module faulty? Replace the Module Go to next step 3 Is there continuity between Blower knob of HVAC panel & blower position detection module and Blower motor? Go to next step Establish continuity by rectifying harness connections as per the circuit schematic 4 Are there any pins (A37,A44) backed out from the EMS ECU Connector? Rectify/Replace Connectors Go to next step 5 Is Blower position detection module pin A37, ShortCircuited to ground? 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. AC blower fan is getting activated & AC compressor is getting engaged and AC is functioning normally. Ensure that no faults are logged in EMS before handing over vehicle back to customer Circuit Schematic Diagram:
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