Automotive Sensor Testing (Diagnostic Strategies of Modern Automotive Systems Book 1) by Mandy Concepcion

Author:Mandy Concepcion [Concepcion, Mandy]
Language: eng
Format: mobi
Tags: Repair & Maintenance, auto-training, electronics, automotive technician, obd ii, automotive, obd2, computer networks, auto-technology, mechanic, auto, technician, Transportation, auto-repair, obdii, auto-electric
ISBN: 9781463552466
Publisher: www.autodiagnosticsandpublishing.com
Published: 2011-05-25T16:00:00+00:00

Section: COMPONENT TESTING

* The first step common to all MAF or VAF sensors is to perform a thorough visual check of the air duct to detect any breaking of the rubber air duct. Secure and tight clamps are a must. Do not overlook this simple procedure as it is common to find broken ducts that are hard to see at first sight.

* The second common ailment to check for is a vacuum leak. Vacuum leaks have a big effect on MAF operation, since it provides a way for the air to enter the engine through a passage other than the throttle bore. This illegal air is never measured by the MAF and never compensated for by the ECM with extra fuel added. A lean mixture is usually the result. Check the power feed and grounds going to the air flow sensor.

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