EA4 NTC 0x0B9 EcuIdnFlt

Slide 1

NTC ECU Identification Fault
Overview
NTC 0x0B9

FDD: ES011A

Description:

This diagnostic is responsible for detecting incorrect ECU Id either on the primary or secondary ECU.

Diagnostic Overview:

The Dual ECU Identification Function shall indicate a negative result if either of the following conditions are true

  • -Primary ECU Id is either 0 or 3 

  • -Secondary ECU Id is either 0 or 3 

  • -Primary ECU Id is same as Secondary ECU Id 

  • -Valid SecdryEcuId is not received in a specified time window 

  • -ECU Communication time out occurs when trying to communicate with the secondary ECU 

Typical Fault Response:  

    • –F3  Failure
       

Probable Sources (Most to Least Probable):

      • •Communication Time out 

      • •Broken pins to read the ECU Id or either ECUs 

      • •Same ECU Id for both ECUs (Pin connection mismatch) 

Initialization

 

Periodic

X

Event

 

Bit

Cause

0

Identical ECU Identification Fault

1

Primary ECU Invalid Identifier Fault

2

Secondary ECU Invalid Identifier Fault

3

Primary ECU Identifier Not Read Fault

4

Secondary ECU Identifier Not Read Fault

5

Secondary Ecu Request Identifier Time Out Fault

6

Ecu Communication Time Out Fault

7

Unused

Rev

Revision

 

Initial Release

  
  
  
  
  
  
  
  
  

Revision Log

Last modified October 12, 2025: Initial commit (1fadfc4)