TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

TATA BSVI Gasoline Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.2 Date: 18-12-2019 Prepared By: Sunita Mandlik Checked By: Yeshwant Jadhav Approved By: Satish Kumar Document Part No: 2921 02 xxx xxxx Page: 211 of 1498 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. P0122-11: Throttle/Pedal Position Sensor/Switch “A” Circuit Low– Circuit Short to Ground or Open Circuit Overview: ISO Code P0122-11 Customer Symptom Vehicle /engine speed will be restricted Fault Effects (On Vehicle) 1. Vehicle runs with calibratable speed limitation. Lamp Status (If Any) MIL ON after 1drive cycle Fault Detection Condition This fault gets logged if the throttle position Sensor signal pin 203 is short Circuited to ground or Open Normal Operating Condition Throttle actuator functions as per design Probable Trouble Area Throttle Actuator and position Sensor ,wiring harness connections, EMS ECU Healing Condition After 3 drive cycles Fault permanent deletion 1. Clear DTC Command form Scan tool 2. Stack Over Flow. 3. 40 warm up cycles. 4. ECU Flashing. 5. ECU Power-Fail Component Details: A DC motor drive is used to move the throttle valve over the complete movement range. The DC motor is directly controlled by the ECU of the Gasoline engine. Throttle Valve H-bridge driver of EMS ECU provides bidirectional control with active recirculation and over current detection. Preliminary Checks: 1. Check whether dust/mud/any particle is blocking throttle valve. 2. Check whether the throttle valve is stuck closed 3. Check for any throttle body related faults and rectify those faults by following their rectification procedure. 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 Step 2 2. Is there wiring harness electrical continuity between ECUpins 223,203, 220 &Throttle Position Sensor connector pins 3,6,5. Go to Step 3 Establish continuity by rectifying harness connections as per the Circuit schematic