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Vehicle Platform: OSPREY
ECU Name: Hella Body Control Module (BCM) DTC
Troubleshooting Data
Version: 1.4
Date: 15 May 2018
Author: Body CoC
Page: 278 of 855
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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.
B2503 – 12: Reverse Gear Selection Switch - Circuit short to Battery
Overview:
ISO Code
B2503 - 12
Customer Symptom
Reverse lamps always ON
Fault Effects (On Vehicle)
1. Reverse lamps always ON
2. Battery Drain
Lamp Status (If Any)
Always ON
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 fault is
detected for reverse gear selection 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. Reverse gear switch input Short to battery from
Cockpit wiring harness
3. Switch damaged or stuck
4. Gear selection switch side connector fault.
5. BCM ECU fault
Healing Condition
3. Ignition OFF
ON
4. Clear DTC Command
Component Details:
Reverse gear selection switch is part of gear selection switch at gear box. If the IGN is ON and user
engages the reverse gear, reverse lamps will be turned ON.
Preliminary Checks:
1. Check Battery Voltage (12.5 V & above)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-