Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 401 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 P05FD-4B: Turbocharger/Supercharger Boost Control "A" Temperature Too High Overview: Code Cause Effect on Vehicle Fault Code: P05FD-4B 1. ECU connector loose connection 2. ECU hardware malfunction 1. MIL Lamp ON 2.Higher engine noise may be observed 3. Reduced vehicle performance 4. Disabled drive mode option Lamp status: Check Engine Lamp off Malfunction Indicator Lamp on Checkpoints: Check battery voltage at Ignition off (Nominal range – 11.5V to 12.8V) Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check whether the ECU connector is connected properly - Step 2 Check all sensor connectors are connected properly & working correctly - Step 3 If the problem persists, replace the ECU - Circuit Description: ECM continuously monitors its internal memory status, internal circuits. These are basically self-checks that ensure that ECM is functioning properly. If any malfunction is detected, ECM will set the DTC. ECM is supplied voltage from the battery positive supply through Main relay. ECM ground connection is connected to the battery negative supply. ECM functionality critically depends on ensuring proper ground connection.
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