External System not Connected
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Driver School Candidate
Joined: Jan 2010
Posts: 9
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From: tx
External System not Connected
Just bought an 04 Lexus Ls 430 and the navigation system sometimes tells me that the external system not connected and the a/c controls don't function and the screen goes black for a couple of minutes and sometimes it works fine. Can somebody please tell me what i should do before i get charge couple of thousand $$? thank you in advance.
Instructor
Joined: Dec 2009
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From: NY
Thread Starter
Driver School Candidate
Joined: Jan 2010
Posts: 9
Likes: 0
From: tx
Yes, you are wright the only thing i tried was disconnecting the sockets from the navigation system located in the trunk but there was no solution, the wierd part is that sometimes if i turn off the engine and turn it back on it works again, i don't know if you have any other suggestions? thank you in advance.
Thread Starter
Driver School Candidate
Joined: Jan 2010
Posts: 9
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From: tx
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Lead Lap
Joined: Jan 2002
Posts: 529
Likes: 3
From: Ohio
Well it was raining today here in Ohio and I grabbed the umbrella from the backseat. Unfortunately I forgot to close the rear door all the way, so when I came out to my car today the battery was dead enough it wouldn't start.
Got a jump from a guy at work, and after I let her run for a while I got the dreaded "External System is not available".
Shut the car off for a while, restarted it, same thing. Symptoms: No Audio, NAV, HVAC controls, bluetooth, etc.
Got it home, checked all the fuses, still nothing.
*THE FIX THAT WORKED FOR ME*
Disconnected the positive battery terminal for about 5 minutes.
Reconnected it, and everything came back!
Got a jump from a guy at work, and after I let her run for a while I got the dreaded "External System is not available".
Shut the car off for a while, restarted it, same thing. Symptoms: No Audio, NAV, HVAC controls, bluetooth, etc.
Got it home, checked all the fuses, still nothing.
*THE FIX THAT WORKED FOR ME*
Disconnected the positive battery terminal for about 5 minutes.
Reconnected it, and everything came back!
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Racer
Joined: Jun 2001
Posts: 1,262
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From: Alabama
my Toyota Sienna has a nav system (JBL factory) that would do something similar. I learned that one of the fuses had a poor connection. I replaced all the radio/nav fuses and it works fine without interruption now. It's not expensive to try this fix too.
10th Gear
Joined: Apr 2020
Posts: 10
Likes: 0
From: Alberta
Just bought an 04 Lexus Ls 430 and the navigation system sometimes tells me that the external system not connected and the a/c controls don't function and the screen goes black for a couple of minutes and sometimes it works fine. Can somebody please tell me what i should do before i get charge couple of thousand $$? thank you in advance.
Did anyone figure out a solution? My 2004 does that every now and then. Seems to happen when I drive at highway speeds for a while
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djs123
LS - 3rd Gen (2001-2006)
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Feb 8, 2010 09:33 AM
