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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 no-start diagnosis with a test spark plug: Technician A says that if a testlight flutters at the coil tach terminal but the test spark plug does not fire when connected from the coil secondary wire to ground with the engine cranking, the ignition coil is defective. Technician B says that if a test spark plug connected to a terminal of a waste spark ignition coil fires when the engine is cranking but the engine does not run, a bad PCM is indicated. Who is correct?

a. Technician A

b. Technician B

c. Both A and B

d. Neither A nor B

To determine

The technician with the correct approach.

Explanation

Given information:

While discussing the no-start diagnosis with a test spark plug:

Technician A says, if a test light flutters at the coil tach terminal, but the test spark does not fire when connected from the coil secondary wire to ground with the engine cranking, the coil is defective.

Technician B says, if a test spark plug is connected to a terminal of a waste spark ignition coil fires with the engine is cranking but the engine does not run, a bad PCM is indicated.

While running a no-start diagnosis, the spark plug is fitted to the spark plug wire...

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