What's this sound?

I have a 2009 Tacoma DBL Cab 4X4 V6 L/B. Everytime I start my truck and put it into gear, a sound that I can only describe as sounding like an air wrench going off for a second comes from the front passengers side of the truck. It sounds like it is coming from underneath the truck. I thought it sounded like the rear view camera was activating itself. This only happens each time the truck is shut off and started and put into gear. I am sure it is supposed to happen, but I would like to know what the sound is. The dealership that I bought it from didn't give me a satisfactory answer. I suggested it sounded like the rear camera was focusing itself and they agreed. Sounds like it may be a case of the blind leading the blind. Does anyone on this forum have any ideas as to what that sound may be and do other 09 Tacoma owners experience the same noise when they start their truck and put it into gear?

 

You might be referring to the ABS system check. It's a sound that happens everytime you put the truck in gear and start moving.

 

That sounds like that could be the sound I am hearing. I am sure it is a sound that is supposed to happen and the ABS system check would be a likely culprit. Thankyou!

 

You would think that after all those years of marriage. I would be able to tune out every sound known to man.

 

ABS self check, both my tacoma and 4runner do it.

 

Dang 09's come with a camera unit for the rear?

 

sure do WW. though im so used the driving w/my mirrors i dont find myself using it much.

 

Dang I didn't know that! Is that a standard option? Also, where is the monitor located?

 

Hey since were are on sounds. Is it normal for our trucks to make a little ticking sound from the engine while it is running?

 

monitor is in the rearview mirror. and yes, that tick is perfectly normal.

 

Wow, monitor on the rear view mirror! That's sweet. Dang I'm jealous!!

 

I use the monitor to see what I am running over. WW, my brother is the Fire Chief for the city of Morgantown, WV. I have a lot of respect for firefighters!

 

Cool! Props go to him!!! Is he a full timer or volunteer?

 

Full time. 33 years as a firefighter. Probably gonna retire within a year.

 

Jeez!! That is a long time!!! Well good for him!!!