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Q5/X451 FATC
DTC Troubleshooting Data
Version: 1.0
Date: 16-Oct-2018
Copyright ©
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.
Author: ERC
Page: 76 of 202
B1F1D-15:- Fresh Air/RECIRC Feedback Signal - Circuit Short to Battery or open;
ISO Code
B1F1D- 15
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)
When Air inlet feedback signal STS is detected, motor will
stay at current position. Thereafter if any new user
request/AUTO comes, motor will be driven on Time basis.
Fault Detection Condition
Fresh/RECIRC Door Control Motor Feedback Line - Circuit
short to battery or open
Normal Operating Condition
With the Fresh/RECIRC feedback line connected to the
harness and with Ignition ON, check the voltage between
pin no 13 of blue connector & ground. The voltage range
should be in between 0.4 to 4.47 V
Probable Trouble Area
1) Sensor connector is not connected firmly (open)
2) Sensor signal short to Battery
Healing Condition
If there is a continuity between the Air Inlet door actuator
Feedback line and Battery line correct the wiring harness
(wiring harness short to battery)
Component Details:
The recirculation/fresh air selector door actuator motor controls the position of the door which allows fresh air or
recirculation air, or a combination of the two, into the vehicle. The motor is mounted on the recirculation /fresh
air duct.
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 Air-Inlet Door
Flap
and
AI Door flap Position (Internal Value)
for
actual and target position of Actuator