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{Osprey CCM}
DTC Troubleshooting Data
Version: 2.0
Date: 28-Jul-17
Author: ERC
Page: 48 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.
B1F1F-11:- Air Temperature Feedback Signal - Circuit Short To Ground;
:
ISO Code
B1F1F – 11
Customer Symptom
System is less responsive to user control and environmental
conditions
Fault Effects (On Vehicle)
1) If Motor learning is in process, end stops will not be learnt
properly
2) Motor will not be positioned accurately
3) Cooling and Heating will not be accurate
Lamp Status (If Any)
NA
Fault Detection Condition
Temperature Door Control Motor Feedback Line - Circuit
short to Ground
Normal Operating Condition
With the Temperature feedback line connected to the harness
and with Ignition ON, checks the voltage between blue
connector pin no 4 & ground of the Connector. The voltage
range should be in between 1.3 to 3.89 V
Probable Trouble Area
1) Motor connector is not connected firmly (open)
2) Motor feedback line short to Ground
Healing Condition
NA
Component Details:
The actuator controls the position of the temperature blend door based on the voltage signal from the FATC module.
Potentiometer, inside the actuator, sends a feedback signal to the controller and controller cuts off the voltage signal
coming from the controller when the required door position is achieved.
Preliminary Checks:
Switch On the IGN & perform the following check.
1) Connect the Diagnostics tool & check the DTC fault code
2) Read ECU parameter value
Target Position of Temperature Door Flap
and
Temperature Door flap Position
(Internal Value)
for actual and target position of Actuator