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{Osprey CCM}
DTC Troubleshooting Data
Version: 2.0
Date: 28-Jul-17
Author: ERC
Page: 204 of 244
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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.
U0028-13:- Vehicle Communication Bus A-open circuit
Overview:
ISO Code
U0028-13
Customer Symptom
Reduced climate control functionality and performance.
Fault Effects (On Vehicle)
Reduced climate control functionality and performance.
Lamp Status (If Any)
N.A
Fault Detection Condition
1. HVAC connector is not connected properly or
disconnected from its location
2. CAN Stub wire from HVAC connector side is
disconnected.
Normal Operating Condition
HVAC ECU communicates properly with TML diagnostic
Tool.
Probable Trouble Area
Disconnection of the HVAC connector
Healing Condition
To fix the HVAC connector correctly and Fix the wiring
harness issues from HVAC side.