whining sound when pushing CDL button (1 Viewer)

Joined
Dec 26, 2009
Messages
862
Location
Bay Area, CA
I get the LX470 back after a stereo install. Mysteriously the CDL light is on after their installation yet I dropped the truck off with diff lock disengaged. Mysterious because I dropped the truck off with the upper center stack out of the car (I'm converting to a 3 dial climate system).


Anyway, I temporarily plugged the 3 dial system into the truck (it's been tested before in the truck before the stereo install). I attempt to disengage the CDL. No luck.

Crap! Nothing but a high pitch sound. Almost sounded like a grinding noise though.

Thoughts? I'm wondering if they tapped some of the wires in the harness incorrectly or something similar? I drop home with CDL engaged but for short 5 miles and was going out of my way to make wide long turns to ease the torque on the drive system.

HELP! Where do I even check first.
 
Joined
Sep 21, 2007
Messages
3,338
 
We had a montero that did the same thing after work at Pacific Stereo in fremont...apparently the drilled a screw through the sheet metal and pierced one of the wires which control the 4wd. Hope you can find a solution!

I'm guessing you wont be buying the FRB from me anymore?lol
 
Joined
Dec 26, 2009
Messages
862
Location
Bay Area, CA
I'm still buying that. Hard to get across town without a car. Hold on to that part!


Also, I'm thinking the sound is not mechanical. More like an electrical sound. Or similar to an electric motor that's whining but not working correctly. The whine isn't consistent and even happens when the truck is stopped and idling.

In fact, mechanically I think the diff is ok. It's "appears" to just not be releasing the diff lock. There are no problems driving the truck. No sounds, chirps, pops, clunks.
 
Joined
Sep 21, 2007
Messages
3,338
 
I'm still buying that. Hard to get across town without a car. Hold on to that part!


Also, I'm thinking the sound is not mechanical. More like an electrical sound. Or similar to an electric motor that's whining but not working correctly. The whine isn't consistent and even happens when the truck is stopped and idling.

In fact, mechanically I think the diff is ok. It's "appears" to just not be releasing the diff lock. There are no problems driving the truck. No sounds, chirps, pops, clunks.
Darin, you can go to my mechanic! He specializes in Toyotas! Alvin's Auto Center in milpitas!
 

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