Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 384 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 P2101- 4B: Throttle Actuator "A" Control Motor Circuit Range/Performance OverTemperature Overview: Code Cause Effect on Vehicle Fault Code: P2101- 4B 1. Open or short in the circuit to the Throttle Actuator 2. Throttle Actuator - inoperative (mechanically or electrically) 3. Failed EMS ECU 1. MIL Lamp ON 2. Unable to accelerate engine 3. Reduced vehicle performance 4. Disabled drive mode option Lamp status: Check Engine Lamp off Malfunction Indicator Lamp on Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check the Battery voltage at Ignition Off Nominal range (11.5 to 12.8 V) Step 2 Check functionality of throttle actuator by actuator test using service tool - Step 3 Check open or short circuit to throttle actuator. Check continuity between throttle actuator pins 1,2,3,5 to ECU pins –A87, A66, A42, A60. Check supply voltage of 12 V at throttle actuator connector pin no.4 - Step 4 If problem persists, replace the ECU - Verification condition: Warm up the engine above 80degC and run the vehicle in city & highway condition for 20 mins Component Details: The EMS ECU receives inputs to determine when and how long it needs to operate the throttle actuator. These inputs are voltage signals received from coolant temp, intake air temp, engine rpm and air conditioning system pressure sensors. Once the EMS ECU has received these inputs it can modify the signal to the throttle actuator. Circuit Schematic Diagram:
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