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

Vehicle Platform: NEXON, X4, Q5, TIGOR_MCE ECU Name: PEPS DTC Troubleshooting Data Version: 1.7 Date: 01 Aug 2019 Author: Rajasekhara Reddy Page: 236 of 389 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. B1018 – 12:- Control Signal to Ignition Relay Output – Short to Battery Overview:- ISO Code (DTC Code) B1018 – 12 Customer Symptom 1. Green color Ignition LED will remain ON in OFF, ACC & IGN power mode. 2. Vehicle will always Ignition or crank ON condition. 3. Vehicle cranking is possible. Fault Effects (On Vehicle) 1. Green color Ignition LED will remain ON in OFF, ACC & IGN power mode. 2. Vehicle will always Ignition or crank ON condition. 3. Vehicle cranking is possible. Lamp Status (If Any) N.A. Fault Detection Condition 1. Permanent short circuit to battery of control signal to Ignition relay output. 2. Wire cut & shorting to battery of Connector-2 / Pin-20 signal. 3. Bending of pin-20 of connector-2 and shorting to adjacent pin. Normal Operating Condition 1. Vehicle battery voltage shall be normal. 2. No fault on control signal to Ignition relay output should be present. 3. Ignition color LED is SSB should be working. Probable Trouble Area 1. Permanent short circuit to battery of control signal to Ignition relay output. 2. Wire cut & shorting to battery of Connector-2 / Pin-20 signal with vehicle body. 3. Bending of pin-20 of connector-2 and shorting to battery pin. 4. Green color LED is SSB is faulty. Healing Condition 1. After fixing short to battery fault on control signal to Ignition relay output, In OFF power mode NO LED should turn ON, In Accessory power mode amber color LED should turn ON & in Ignition power mode green color LED should turn ON. Table 51:- B1018 - 12 overview details Component Details:- 1. PEPS ECU 2. Ignition relay 3. Start/stop button Preliminary Checks:- 1. Check vehicle battery voltage, it should be normal. 2. Check ECU pins for oxidation, bending or damage.