Describe and Develop a Detailed Fault Finding Process That Would Lead to the Successful Diagnosis of and Replacement of an Injection Management Ecu Following a Non-Start Situation in Which There Is No Communication

Table of Contents


The Process2

Statement of Problem2


Diagnostic Phase3

Diagnostic Plan3

Observation and Definition of Problem Areas4

Test and Repair4

ECU Replacement5

ECU Replacement Plan6

The Fix6

Fix Test6

Post Fix7


Bibliography 8


Developing an efficient fault finding process is very beneficial to the successful diagnosis of

faults that pertains to electrical or mechanical systems. Also the ability to break the process

down to tiny processes that can be documented and followed as Standard Operating

Procedures would save time, manpower at the same time as financial resources. Warren

Rhude states that

“To expertly troubleshoot electrical equipment, problems must be solved by replacing only

defective equipment or components in the least amount of time”1

The process that will be used in this paper is a 5 step process; it is mainly generic and could

be used to troubleshoot any type of electrical or mechanical fault in vehicles. It combines

thinking and checking process that is used to analyse and determine defective equipment or

components that are responsible for faulty operations.  


 Preparation

 Observation   & Definition of Problem Areas

 Identify and Check Possible Causes

 Test and Repair

 Follow up

STATEMENT OF PROBLEM: Nissan Primera with registration number 06 W 936

presented with the following problem: Vehicle not starting but engine turning over. Owner

had tried to jumpstart vehicle with a truck (24volts) battery.


1 Warren Rhude, Electrician Training - A Systematic Approach to Trouble shooting and Electrical Fault Finding. (Accessed September 30, 2010)

Before beginning to do any work, I prepare by getting all the tools that I envisage I might

need in the process. I also...