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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: 493 of 855
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TATA MOTORS Ltd.
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B2238- 11: Rear Defogger switch circuit short to GND/ Open
Overview:
ISO Code (DTC Code)
B2238-11
Customer Symptom
Every time vehicle enters into RUN mode is switched
ON, Rear defogger switches ON for 15 mins.
Fault Effects (On Vehicle)
Unintended switching ON of rear defogger.
Lamp Status (If Any)
Rear Defogger LED switches ON for 15 mins every time
vehicle in RUN mode.
Fault Detection Condition
DTC logged during Input switch routine
Normal Operating Condition
No DTC logged during Input switch test routine
Probable Trouble Area
1. Switch stuck low
2. Wiring harness short to GND
3. BCM fault
4. BCM connector fault
Healing Condition
1. Run Input Switch test routine DTC.
2. Read DTC, no DTC shall be logged
Component Details:
Rear Defogger switch(part of fascia switch) is a non-latchable switch. Hence BCM detects GND at this input
pin till the switch is pressed.
Preliminary Checks:
1. Check Battery Voltage (9V-16V)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-