Vehicle Platform: Tiago,Tigor & Osprey ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 2.0 Date: 22-10-2018 Author: Parag K Page: 341 of 737 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. B1306 - 12: Left Rear Door Ajar Switch - Circuit short to Battery or Open Circuit Overview: ISO Code B1306 - 12 Customer Symptom 1. Interior Roof lamp in Auto mode selection doesn’t operate when Rear Left door is opened. 2. The IC shows Rear Left door as closed status, even if the Rear Left door is opened as presumed by the customer. 3. The Mis-lock sound does not occurs on RKE lock command. 4. The vehicle will get lock on RKE lock command. Fault Effects (On Vehicle) 1. Interior Roof lamp in Auto mode selection does not operate when L door is opened. Lamp Status (If Any) 1. Roof lamp in Auto mode selection is OFF. 2. IC shows Rear Left door closed status always Fault Detection Condition This fault will be logged after the input switch test routine execution. User has to operate the switch manually during routine. If short to battery or open circuit fault is detected for Left Rear Door Ajar Switch, then this DTC code will be returned with the routine results. Normal Operating Condition There should not be any fault returned by routine Probable Trouble Area 1. BCM connector Fault 2. Left side wiring harness Short to battery or open circuit 3. Left Rear Door Ajar Switch is damaged or stuck or faulty 4. BCM ECU fault Healing Condition 1. Ignition OFF ON 2. Clear DTC Command Component Details: Rear Left Door Switch, BCM connector Functionality: If the Rear Left Door Switch is short to Battery or Open Circuit, then the Rear Left door state is in closed state. If the Rear Left door is closed, then BCM shall receive the feedback of Rear Left door as closed status. Preliminary Checks: 1. Check Battery Voltage (12.5 V & above) 2. Check ECU pins for oxidation, bending & damage. Trouble Shooting:
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