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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: 166 of 202
U131D-88:- CCH LIN Bus A-Bus Off
Overview:
ISO Code
U131D-88
Customer Symptom
FATC Malfunctions or goes OFF
Fault Effects (On Vehicle)
CCH inputs shall not be accepted by CCM
Lamp Status (If Any)
if CCH LIN BUS OFF is observed, CCM shall operate in last
valid value state, CCM can take new values whenever it
receives any user selection request from HU
Fault Detection Condition
When LIN signal (CCM vehicle side connector C1-7) is short
to ground.
Normal Operating Condition
CCM is fully functional based on the input provide from CCH.
Probable Trouble Area
Check CCM vehicle side connector (pin C1-7)
Healing Condition
If there is a continuity between the Lin signal and Ground
line correct the wiring harness (wiring harness short to
Ground)