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: 301 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. P0220-12: Short Circuit to Battery of Accelerator Pedal Sensor 1– Circuit Short to Battery Overview: ISO Code P0220-12 Customer Symptom Vehicle Speed / Engine Speed will be restricted. Fault Effects (On Vehicle) Vehicle Speed / Engine Speed will be restricted to a calibratable threshold. Lamp Status (If Any) MIL ON after 1 drive cycle Fault Detection Condition When the Ignition State is On and Accelerator pedal Sensor 2 signal pin is short Circuited to Battery, this fault gets logged. Normal Operating Condition EMS ECU receives plausible signal from Accelerator pedal Sensor 2. Probable Trouble Area Wiring Harness Connections, Sensor Healing Condition After 3 drive cycles Component Details: For safety reasons, the accelerator pedal Sensor is equipped with 2 resistors (potentiometers) with varying operating ranges and separate Circuits. A potentiometer informally a pot , is a three- terminal resistor with a sliding contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat . Preliminary Checks: 1) Loose/ Damaged Connections between Sensor and EMS ECU. 2) Check for back out of pins at both Sensor connector and ECU connector. 3) Check for damage of pins at both Sensor connector and ECU connector. 4) Check the continuity from Sensor connector pins to the ECU pins.