How to test a purge solenoid (Mazda P0443, P0455)

This is a great review of section 3 material in my book, specifically about testing a ground side switched solenoid. I kept it simple this time, doing all my circuit checks with just a digital multimeter and test light. Remember that all the methods shown can be successfully applied to ANY ground side switched output.

Engine Performance Diagnostics chapter 3 pages 2 - 19

Symptoms
check engine light (P0443 and P0455)

Fix
replacing the purge solenoid

Tests shown
how to find the evaporative emissions purge solenoid by following fuel supply lines
how to safely T-pin a computer controlled output
testing a ground side switched solenoid with a digital multimeter and test light
using a bi-directional test to confirm control circuit and driver integrity

Tools used
scan tool
digital multimeter
LED test light

Playlist
(Chapter 3) Transistors, Solenoids, Computer Controlled Output Testing
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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
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Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.