EVP Sensor Open 5v Reference Circuit

Описание: This video covers some key fundamentals that every single technician needs to learn.
What do you do when you find 0 volts on a position sensor signal? How do you force an output solenoid to energize? What is the purpose of the 5v reference and what to do when it is missing?
Are you confident enough in your troubleshooting to make a call on a bad engine computer? Even if that computer costs thousands of dollars?

00:00 - P1406 EGR Valve Position Sensor Circuit Problem
00:20 - EVP signal is fixed at 0 volts
01:10 - how to identify a power or ground side controlled output circuit with a voltmeter
02:20 - energizing an output with an ammeter
03:25 - how to force an electronic EGR valve to open to verify flow and EVP signal changes
04:40 - testing the EVP sensor (potentiometer) with a voltmeter
05:18 - missing a 5v reference to this sensor
06:52 - using a wiring diagram to identify the 5v reference circuit design
08:00 - measuring the 5v reference at the ECM
09:30 - how to check for a spread apart computer connector terminal (pin drag test)
12:27 - jumping the 5v reference circuit to fix our open circuit
14:30 - retesting the EVP sensor with a repaired 5v reference circuit
16:00 - bad engine computer confirmed

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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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