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{Osprey CCM}
DTC Troubleshooting Data
Version: 2.0
Date: 28-Jul-17
Author: ERC
Page: 67 of 244
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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.
B1F2A-12:- Cabin Temperature Sensor - Circuit Short to Battery;
:
ISO Code
B1F2A- 12
Customer Symptom
System is less responsive to user control and environmental
conditions
Fault Effects (On Vehicle)
Vehicle Interior Temperature cannot be evaluated. Heating
and cooling will not be accurate. For intermediate set
temperatures, time taken for cooling or heating will be more
Lamp Status (If Any)
NA
Fault Detection Condition
Incar Temperature sensor circuit - Short to Battery
Normal Operating Condition
Temperature sensor is Functional
Probable Trouble Area
Sensor signal short to battery
Healing Condition
NA
Component Details:
The temperature sensor is usually integrated directly in the control unit and transfers the actual interior temperature to the
control unit. The measured value is used for comparison with the set point.
Preliminary Checks:
1) Read Incar sensor ECU parameter
Vehicle Interior Temperature Internal
from the diagnostic tool
2) Change the temperature settings from 16 Deg to 30 Deg and check if the ECU parameter value Solar Load Status is
updating
3) If the parameter value is not updating then replace the panel