TATA BSVI Gasoline_Bifuel Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.9 Date: 24-01-2022 Prepared By: Veer K. Singh / Prudhvi B Varma Checked By: Yeshwant Jadhav Approved By: Sanjeev M. Document Part No: 2921 02 xxx xxxx Page: 1449 of 1692 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. P1E0A-11: PWM Blower Output failure Short – Circuit to Ground Overview: ISO Code P1E0A-11 Customer Symptom AC Blower will not function Fault Effects (On Vehicle) AC Blower will not function Lamp Status (If Any) No Lamp Indication Fault Detection Condition This fault gets logged if the PWM Blower output Signal pin no. 130 of EMS ECU is Short circuited to Ground. Normal Operating Condition Healthy Wiring Harness connections between EMS ECU and PWM Blower Output Probable Trouble Area Wiring Harness connections Healing Condition Ignition On and after 1 driving cycle fault is healed 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: To avoid the variations in AC Blower motor with respect to battery voltage variations due to IAC (Intelligent Alternator Controller), PWM blower motor controller is used in “BSVI Vehicle with Blower Position Sensor Module applicable for HVAC (Manual AC) variants.’’ Preliminary Checks: 1. Check whether the EMS is receiving Battery supply and Ground 2. Check whether the Battery is healthy 3. Loose/ Damaged Connections between LPM Module and EMS ECU. 4. Check for back out of pins at ECU connector. 5. Check for damage of pins at ECU connector.
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