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: 987 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.

P3021-07: Fire Prevention System: Crash Event Detected– Fire Prevention System: crash event detected

Overview:

DTC Description (User Friendly)

Fire Prevention System: Crash Event Detected

ECU Pin Number

Customer Symptom

MIL OFF, CEL ON

Fault Effects (On Vehicle)

Lamp Status (If Any)

CEL ON. CEL Turns Off as and when fault condition is not

present / healed.

Fault Detection Condition (Root cause)

If Airbag Controller send out a CAN signal to EMS indicating

Crash event detected.

Normal Operating Condition

No Vehicle Crash event

Probable Trouble Area

Check, whether the Airbags are open, If so, rectify the

system.

Healing Condition

Rectify the error

Clear through diagnostic tool

Ignition OFF & ON

Component Details:

SRS / Air bag ECU detects various types of crash events using sensors like Front deploy crash,

rear crash, crash impact due to non-fire event, LHS crash and RHS crash. Once the SRS / Airbag ECU detects crash, it

sends a CAN signal to EMS indicating Crash. Then EMS ECU will perform the safety fuel cut off function.

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.

Trouble Shooting:

Step Checks

IF YES

IF NO

Ensure that the repairs are performed

Check whether the Airbag ECU is sending CAN signal

Indicating - No crash detected.

Go to Step 3

Perform necessary

repairs for Air Bag

Controller / Air

Bags.

Fault Persists.

Call Hotline

Repeat the above

steps for re-

confirmation