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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: 145 of 202
B1F50-15:-Control Module output power for FATC Control Head- Circuit Short to battery and Open
ISO Code
B1F50- 15
Customer Symptom
CCH (LED etc.) goes OFF
Fault Effects (On Vehicle)
CCH shall not be operable
Lamp Status (If Any)
CCH control panel shall be non-operational
Fault Detection Condition
If C1 - 30 of vehicle side connector to battery or Open
Normal Operating Condition
All CCH inputs shall be processed by CCM
Probable Trouble Area
HVAC connector wired wrong,
Harness wire broken,
Connector pin backout,
Damaged crimp, fuse blown
Healing Condition
If there is a continuity between the C1 - 30 of vehicle side
connector and battery line correct the wiring harness
(wiring harness short to battery)
Component Details:
N/A
Preliminary Checks:
1.
Voltage at the battery terminals should be greater than 9V at the Ignition ON Condition.
2.
FATC power supply connector should have greater than 9V for normal functionality of FATC.
3.
Check battery cable and FATC connector terminals for damage.
4.
Check CCM for pin bend/damage.