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{Osprey CCM}
DTC Troubleshooting Data
Version: 2.0
Date: 28-Jul-17
Author: ERC
Page: 159 of 244
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TATA MOTORS Ltd.
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B1F21-11:- Air Distribution Feedback Signal – Circuit Short to Ground;
:
ISO Code
B1F21- 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
Lamp Status (If Any)
NA
Fault Detection Condition
Mode Door Control Motor Feedback Line - Circuit short to
Ground
Normal Operating Condition
With the Mode feedback line connected to the harness and
with Ignition ON, check the voltage between blue connector
pin no 9 & ground of the Connector. The voltage range should
be in between 0.9 to 3.9 V
Probable Trouble Area
Sensor signal short to ground
Healing Condition
NA
Component Details:
The Mode Door Actuator controls the direction of airflow. It selects which way air flows through the different ducts.
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 Mode Door Flap
and
Air Distribution Mode Door flap Position
(Internal Value)
for actual and target position of Actuator