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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: 252 of 737
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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 – 11: Reverse Gear Selection Switch - Circuit short to Ground or Open Circuit
Overview:
ISO Code
B2503 - 11
Customer Symptom
1. Reverse lamps always off
2. Reverse functionality (rear wipe) affected
Fault Effects (On Vehicle)
1. Reverse lamps always OFF
2. Fuse will blow in case of Base BCM
Lamp Status (If Any)
Always OFF
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 ground or open circuit 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 ground or open
circuit from cockpit wiring harness
3. Switch damaged or stuck
4. Gear selection switch side connector fault.
5. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. 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:-