HARRIER BOOK 2

Q501 4 Cylinder MT Application

DTC Troubleshooting Data

Version: 0.1

Date: 21-Sep-2018

Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta

Checked By: Yogesh Jadhav

Approved By: Satish Kumar P

Page: 83 of 1052

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.

U0140-31: Lost Communication With Body Control Module: BCM Node Tout Faulty

Overview:

DTC Description (User Friendly)

Lost Communication With Body Control Module: BCM Node

Tout Faulty

ECU Pin Number

K013 – CAN_H

K014 – CAN_L

A075 – Ignition

K001, K003, K005 – Supply voltage battery

K002, K004, K006 - Ground voltage battery

Customer Symptom

MIL OFF, CEL OFF. Reverse indication will not work

Fault Effects (On Vehicle)

BCM will not work

Lamp Status (If Any)

Fault Detection Condition (Root cause)

1. BCM connector is not connected properly or

disconnected from its location.

2. CAN wire from BCM connector side is

disconnected.

3. BCM is not powered up.

4. CAN_H, CAN_L or/ and both lines of BCM are

opened.

5. Any of the the selected frames from BCM node is timed

out.

Normal Operating Condition

ECM ECU communicates properly with BCM ECU.

Probable Trouble Area

1. Disconnection of the BCM ECU connector

2. CAN_H and CAN_L lines at BCM connector end

Healing Condition

1. To fix the BCM connector correctly

2. Fix the wiring harness issues from BCM side.

3. CAN_H, CAN_L or/ and both lines of BCM are

connected properly to the BCM connector.

Preliminary Checks:

1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above

Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.

2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with

respect to earlier issue closure.

3. Check for Damage in EMS ECU connector / BCM ECU Connector.

4. Check for any back out of pins at EMS ECU connector / BCM ECU Connector.

5. Check for any damage of pins at EMS ECU connector / BCM ECU Connector.

Trouble Shooting: