4191 / 4910
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: 131 of 202
B1F39-23:- Fresh Air / Recirc Request Button -Signal Stuck Low
Overview:-
ISO Code
B1F39 – 23
Customer Symptom
Fresh Air / Recirc Request Button Button cannot be
manually selected
Fault Effects (On Vehicle)
The Fresh Air / Recirc switch is stuck and air inlet door
is not changing it state.
Lamp Status (If Any)
Manual recirc condition is over ridden by auto recirc
condition except for HI/LO and defrost conditions.
If Key Jam(Stuck) is cleared,RECIRC will be activated
/deactivated with single RECIRC key press.
Fault Detection Condition
Fresh Air / Recirc Request Button -Signal Stuck Low
Normal Operating Condition
The Recirc request push button allows the user to
manually choose the position of the air inlet door, as a
manually selected two state function, the air inlet
door will be either fresh air (Fresh) or in-cabin
recirculation (Recirc).
Probable Trouble Area
Air inlet switch component failure.
Healing Condition
Check and lubricate switch, replace control panel
Component Details:
Fresh Air / Recirc
switch Button is shown in above image. The user shall be able to
choose the position of the air
inlet door by pressing Fresh Air / Recirc Request Button.
Preliminary Checks:
Switch On the IGN & perform the following check.
1) Connect the Diagnostics tool & check the DTC fault code
2) If the fault code exists, refer the corrective actions