# While discussing evaporative (EVAP) systems: Technician A says that the coolant temperature has to be above a preset value before the PCM will operate the canister purge solenoid. Technician B says that the vehicle speed has to be above a preset value before the PCM will operate the canister purge solenoid. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor B

### Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
Publisher: Cengage Learning
ISBN: 9781133612315

### Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
Publisher: Cengage Learning
ISBN: 9781133612315

#### Solutions

Chapter
Section
Chapter 33, Problem 3ASRQ
Textbook Problem

## While discussing evaporative (EVAP) systems: Technician A says that the coolant temperature has to be above a preset value before the PCM will operate the canister purge solenoid. Technician B says that the vehicle speed has to be above a preset value before the PCM will operate the canister purge solenoid. Who is correct?a. Technician A onlyb. Technician B onlyc. Both A and Bd. Neither A nor B

Expert Solution
To determine

The correct technician between A and B who are discussing the evaporative (EVAP) system.

### Explanation of Solution

The PCM helps in energizing the solenoid which in turn helps the valve of canister purge to open and soak the gas vapors which comes from the canister by the vacuum in the manifold intake. But the PCM has some conditions to operate the canister purge valve which is related to the coolant temperature. The required condition is that the temperature should be above 80οC. Thus, it can be said that the PCM will operate the canister valve when the coolant temperature is above the preset value of 80οC

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