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: 648 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. B2240- 12: Rear Wiper Relay Short to BATT Overview: ISO Code (DTC Code) B2240- 12 Customer Symptom Rear Wiper is always OFF even though not requested through switch. Fault Effects (On Vehicle) 1. Rear Wiper motor is always OFF. Lamp Status (If Any) NA Fault Detection Condition This fault will be logged with IGN ON and Rear wiper switch request. Normal Operating Condition IGN ON and No DTC logged. Rear wiper operates only when requested through switch. Probable Trouble Area 1. BCM connector Fault. 2. Rear harness Short to Ground. 3. Relay fault. 4. ECU fault. Healing Condition 1. Switch request after fault removal 2. Clear DTC command- No DTC logged Component Details: BCM drives the Rear wiper motor through this relay by providing GND to the relay coil. Hence in case this output is shorted to BATT the relay will be continuously OFF even though user request through combi switch. Preliminary Checks: 1. Check Battery Voltage (9V-16V) 2. Check ECU pins for oxidation, bending & damage. Trouble Shooting:-
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