You are testing the air leakage rate. You should:

Turn off the engine, release the parking brake, and apply the service brake.. Section 5.3: To check the applied leakage rate: Turn off

You are testing the air leakage rate. You should:

ANSWER BREAKDOWN
  • A. Correct. To check the applied leakage rate: Turn off engine, release parking brake, apply foot brake fully, wait 1 minute.
  • B. Incorrect. "Leave the engine running and push the brake pedal." is not correct. To check the applied leakage rate: Turn off engine, release parking brake, apply foot brake fully, wait 1 minute.
  • C. Incorrect. "Turn off the engine and leave the parking brake on." is not correct. To check the applied leakage rate: Turn off engine, release parking brake, apply foot brake fully, wait 1 minute.
  • D. Incorrect. "Drive at 5 mph." is not correct. To check the applied leakage rate: Turn off engine, release parking brake, apply foot brake fully, wait 1 minute.