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interior noise behind dash

  #1  
Old 10-19-2011, 02:11 PM
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Default interior noise behind dash

Sebring 2007 V6 sedan 50k km .

Large, loud clicking noise, irregular, comes from behind dash or ignition key...can't exactly tell ..

no MIL , no codes on OBDII everything works perfectly

any ideas before I start disassembling ?
 
  #2  
Old 10-22-2011, 02:04 PM
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it turns out that the noise comes from actuator, left blend actuator is travelling far.

this is very strange it happens only some time, irregular, i assume that control unit faulty ? or shall i calibrate again ?
 
  #3  
Old 10-24-2011, 12:19 AM
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The little plastic gears in it are probably skipping sometimes. Hard to know for sure without watching the feedback on a scan tool.
 
  #4  
Old 10-24-2011, 12:55 PM
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well it lasts about 3-4 seconds before it stops. and on OBDII no DTC was recorded a nothing came up when running HVAC test.

I can replace the actuator but I have no idea how to calibrate it, or there could be damaged control unit that is pushing the actuator too far ?
 
  #5  
Old 10-25-2011, 11:02 AM
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I'm measuring voltage range +5.0 to - 5.0 V when rotating temp control knop is this voltage correct ?

should it be 0V on COLD end or HOT end when door is totally closed to evaporator or opposite to heater core ?

pls advise. i'm getting crazy here ..!
 
  #6  
Old 10-25-2011, 07:23 PM
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What are you using to read the HVAC, a DRB or a generic? Try doing a capacitive discharge (unhooking and touching battery terminals together for 10-30 minutes) and when you boot back up it should go through self calibration when you start the car. I'm assuming you have Auto temp control ATC since you have the V-6 in it.
 

Last edited by TNtech; 10-25-2011 at 07:32 PM.
  #7  
Old 10-26-2011, 05:29 PM
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Normal scan tool, it shows DTC if generated by HVAC without ability to calibrate actuators. and I used voltimeter to measure the voltage at actuator motor. I thought that voltage when blend door is closed to max cool or max heat should be zero.

Tomorrow i will get new actuator ( 62$ from mopar ) replace and perform capacitive discharge as you suggested.

and yes I do have ATC.
 
  #8  
Old 10-27-2011, 10:57 AM
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problem resolved .. replaced actuator without calibrating by installing arm @ same place as the old actuator.

I have seen broken teeth inside old actuator.

I'm satisfied now :-D
 
  #9  
Old 09-27-2017, 04:25 PM
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Is performing capacitive discharge the same on V-4?
 
  #10  
Old 09-19-2018, 04:03 AM
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Default Help me replace mine

Originally Posted by Laimon View Post
problem resolved .. replaced actuator without calibrating by installing arm @ same place as the old actuator.

I have seen broken teeth inside old actuator.

I'm satisfied now :-D
how did u replace it?? Did u have to take dash apart??

 

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