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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: 21 of 202
B1F2D-12:- Air Temperature Motor Drive Line - Circuit Short to Battery;
ISO Code
B1F2D-12
Customer Symptom
No air temperature control (manual or automatic)
Fault Effects (On Vehicle)
If polarity of motor lines is affected by fault, motor will
move to either end stop
Lamp Status (If Any)
Motor To be Disabled
Fault Detection Condition
Temperature Door Control Motor Drive Line - Circuit Short
to Battery
Normal Operating Condition
The voltage between blue connector pin no 4 & ground or
20 & ground of the Connector should be in between 0 to 14
V
Probable Trouble Area
harness wire shorted
Healing Condition
If there is a continuity between the Motor drive line and
battery line correct the wiring harness (wiring harness short
to battery)
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 ,
Target Position of Temperature Door Flap
and
Temperature Door flap Position (Internal
Value)
for actual and target position of Actuator