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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

While discussing IAC valve diagnosis: Technician A says that on some vehicles, a jumper wire may be connected to specific DLC terminals to check the IAC valve operation. Technician B says that if the scan tester indicates zero IAC valve counts, there may be an open circuit between the PCM and the IAC valve. Who is correct?

a. Technician A

b. Technician B

c. Both A and B

d. Neither A nor B

To determine

The technician with correct approach in DLC terminals.

Explanation

Given:

Technician A says that on some vehicles, a jumper wire may be connected to specify DLC terminals to check the IAC valve operations.

Technicians B say that if the scan tester indicates zero IAC valve counts, there may be an open circuit between the PCM and the IAC valve.

Ideal air control valve (IAC) used in vehicles to control the engines idle rotational speed...

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