Honda HR-V: Purpose of this Article
NOTE: This is GENERAL information. This article is not intended to be specific to any unique situation or individual vehicle configuration. For model-specific information see appropriate articles where available.
Learning how to interpret injector drive patterns from a Lab Scope can be like learning ignition patterns all over again. This article exists to ease you into becoming a skilled injector pattern interpreter.
You will learn:
- How a DVOM and noid light fall short of a lab scope.
- The two types of injector driver circuits, voltage controlled & current controlled.
- The two ways injector circuits can be wired, constant ground/switched power & constant power/switched ground.
- The two different pattern types you can use to diagnose with, voltage & current.
- All the valuable details injector patterns can reveal.
SCOPE OF THIS ARTICLE
This is NOT a manufacturer specific article. All different types of systems are covered here, regardless of the specific year/make/model/engine.
The reason for such broad coverage is because there are only a few basic ways to operate a solenoid-type injector. By understanding the fundamental principles, you will understand all the major points of injector patterns you encounter. Of course there are minor differences in each specific system, but that is where a waveform library helps out.
If this is confusing, consider a secondary ignition pattern. Even though there are many different implementations, each still has a primary voltage turn-on, firing line, spark line, etc.
If specific waveforms are available in On Demand for the engine and vehicle you are working on, you will find them in the Engine Performance section under the Engine Performance category.
READ NEXT:
Introduction, Overview of Noid Light
INTRODUCTION
You probably have several tools at your disposal to diagnose injector
circuits. But you might have questioned
"Is a lab scope necessary to do a thorough job, or will a set of noid lights
Overview of DVOM
A DVOM is typically used to check injector resistance and available voltage
at the injector. Some techs also use
it check injector on-time either with a built-in feature or by using the
dwell/duty f
SEE MORE:
Symptom Check List Worksheets
* PLEASE READ THIS FIRST *
NOTE: This article is intended for general information purposes only. It
does not apply specifically to one make or model.
PURPOSE
NOTE: This article is intended for general information purposes only. It
does not apply
specifically to one make or model.
WHY USE THE SYMPT
Phone Setup
■ To pair a mobile phone (when there is
no phone paired to the system)
1. Select Phone.
2. Select Yes.
3. Make sure your phone is in search or
discoverable mode, then select OK.
HFL automatically searches for a
Bluetooth device.
4. Select your phone when it appears on the
list.
If your phone d
