Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 416 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 P0004-1B: Fuel Volume Regulator Resistance High Overview: Code Cause Effect on Vehicle Fault Code: P0004-1B 1. High IMV resistance defect 2. Electrical wiring loose connection 3. Contaminants in connector 1. CE Lamp ON 2. Reduced vehicle performance 3. Disabled drive mode option Lamp status: Check Engine Lamp on Malfunction Indicator Lamp off Checkpoints: 1. Check Battery Voltage at Ignition off (Nominal Range 11.5V~12.8V) Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check if the IMV connector is connected properly. Remove and connect again properly - Step 2 Check if the IMV resistance is below 8.5 ohms - Step 3 Check for continuity between IMV sensor connector pins 1, 2 and ECU pins (B3,B5 or B6)T87, A25, respectively. - Step 4 Check the IMV sensor physically for any damage - Step 5 If the problem persists, replace the HP fuel pump - Associated Parameters: Parameter Label Description DID Monitoring Main injection fuel demand chkd Main injection fuel demand. FE65 Ranges from 1 mg/st to 55 mg/st based on engine load IMV current demand IMV current demanded by the ECU FE14 “IMV current demand” and “Measured current in the IMV
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