Automotive Technology
Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 24, Problem 2ASRQ

While discussing OBD II systems: Technician A says that the PCM illuminates the MIL if a defect causes emission levels to exceed 2.5 times the emission standards for that model year vehicle. Technician B says that if a misfire condition threatens engine or catalyst damage, the PCM flashes the MIL. Who is correct?

  1. Technician A

  • Technician B
  • Both A and B
  • Neither A nor B
  • Blurred answer
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    Which of the following statements regarding the “Pre-Emission Inspection Check” Of a diesel powered vehicle that is subject to Opacity (Smoke Meter) testing is not true? The governor (if equipped), the exhaust system, and the emissions control devices must all be checked.   The exhaust system must be checked for any missing sections which would prevent collection of a valid exhaust sample.   Vehicles not meeting requirements cannot be inspected. This is not considered an inspection or rejection and no fee is to be charged.   The governor, if originally equipped, must be checked for presence, connection, and operation.
    The Diesel Emissions Opacity Inspection Procedure includes a visual check of the OEM (Original Equipment Manufacturer) emissions control devices for presence and connection. The Certified Inspector must reject the vehicle if any are missing, disconnected, or disabled (tampered). True or False?
    While discussing the MIL on OBD II systems: Technician A says that the MIL will flash if the PCM detects a fault that would damage the catalytic converter. Technician B says that whenever the PCM has detected a fault, it will turn on the MIL. Who is correct? a. Technician A • Technician B • Both A and B • Neither A nor B

    Chapter 24 Solutions

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