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Thread: How to diagnose cruise control problems. Reply to Thread
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Topic Review (Newest First)
Today 10:37 AM
Cseybert
Figured out my issue, vacuum leak

I just wanted to give you guys an update on how I fixed my cruise control.

when I did the test, I only heard a winding up of the pedal motor, then nothing. I figured it was a bad module or something. but it turned out to be a vacuum leak. in the picture below you can see the new line, it is right behind the EGR valve. the only reason I knew this is because I through a diag code for it when the car wasnt shifting properly. replaced the line, and the car runs perfect, and CC works!!!!

hope this helps someone else!

http://i.imgur.com/DSbB5XP.jpg

http://i.imgur.com/aR01bJp.jpg
09-24-2016 04:16 PM
joeblo1999
Quote:
Originally Posted by joeblo1999 View Post
One flash at end of test...accel button...means all is normal.

Sent from my SM-N920T using FF Mobile
👍cool

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09-18-2016 05:29 PM
joeblo1999
Quote:
Originally Posted by WilsonStaff View Post
HI, new to this forum but i have three Focus (2007 ZX5 SES - 2006 ZX5 SES and 2005 ZXW SES full trim.
- -
My c/c on the 2005 ZXW is acting up. Here are the conditions after I've read all this:
- all fuses are ok
- main and 3rd brake lights are working
- cable is connected to the throttle body
- diagnosis test gave me no flash after last button (but i might done it wrong)
- c/c light is on when i ride after hitting the SET button
- brake pedal DOES disengage the c/c light
- brake pedal has no effect when i lift it up

any culprits left?


Thanks!


EDIT: ended up the cable wasn't correctly connected into the throttle body.Now it is and now c/c works!
One flash at end of test...accel button...means all is normal.

Sent from my SM-N920T using FF Mobile
09-18-2016 04:47 PM
joeblo1999 Cruise control inoperative 2003 se 2.3 auto (build date 9/2003) even though it passed the self tests that someone outlined here. Got one blink on all 5 buttons so test indicates it is functional and should work.<br />
Also what is crazy is cruise light will not come on when ON switch pressed but light comes on when SET switch is pressed , but not operative.<br />
On top of that the light goes out if I hit the brakes (normal) Also the light will go out if OFF is pressed (normal) , but remember the light came on with pressing the SET switch, not the ON switch on the left side of steering wheel.<br />
It had been working until just recently.<br />
I'm guessing BPP switch not working preventing it from arming ?<br />
<br />
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08-31-2016 08:15 PM
WilsonStaff Hi sailor, i got no flashes from the test, but i might have done it wrong!!!! As i said, ended up the cable was not connected to the t/b. Now it is. Thanks!
08-31-2016 08:12 PM
sailor You missed telling us what it's doing wrong, whether you got ANY flashes in the test sequence as described in the first post, or if you pulled on the cruise cable to make sure it's still attached in the module.
08-31-2016 07:46 PM
WilsonStaff HI, new to this forum but i have three Focus (2007 ZX5 SES - 2006 ZX5 SES and 2005 ZXW SES full trim.
- -
My c/c on the 2005 ZXW is acting up. Here are the conditions after I've read all this:
- all fuses are ok
- main and 3rd brake lights are working
- cable is connected to the throttle body
- diagnosis test gave me no flash after last button (but i might done it wrong)
- c/c light is on when i ride after hitting the SET button
- brake pedal DOES disengage the c/c light
- brake pedal has no effect when i lift it up

any culprits left?


Thanks!


EDIT: ended up the cable wasn't correctly connected into the throttle body.Now it is and now c/c works!
08-03-2016 11:50 AM
blazindave Haven't quite found my exact symptoms on here yet, could use some help...

history:
2003 ZX5
had a bad clockspring for a long time (years) that made my airbag light always lit (and likely inoperational) and cruise control didn't work. finally when I noticed the horn stopped working, I replaced the clockspring and all was well (fixed airbags, cruise, and horn).

Not too long after that got replaced, the cruise started only working intermittently (horn and airbag seems to still work so I'm guessing the replacement clockspring is still good).

Most times I try to engage CC it doesn't work, but sometimes it does. I have replaced the high center brake light with LEDs (regular tail lights are regular bulbs). Had the intermittent CC both before and after the LED change. Seems if it were caused by the LED change then it should never be working.

Tried the diagnostic and I got a light after each button press (including Set), but then no flashes. so does that count as 1 flash (for the one after Set) or no flashes? Also, I did hear the stepper/servo noise followed by thud, as described by some others.

So my initial thought is that it's my steering wheel switches. When I was investigating my previous clockspring replacement, I seem to recall that each switch set (left on/off and right resume/set/cruise) only used 2 or 3 wires and the resistance between them changed depending on the button pressed... Like total of 4 or 5 wires being used instead of 1 common and then 1 signal wire for each switch (5 switch signal wires + 1 common = 6 wires). Does this sound right? If so, can someone tell me what the correct resistances (and between which wires) I should be reading from each button press?

Could one of the brake switches be sticky or would that show up in the diagnostic as a different flash sequence?
03-29-2016 11:51 AM
sparky34kv Is there a clip or something to keep the plastic at the end of the cable on the attachment point on the throttle? I fixed mine a couple of weeks ago when I found it had just come off. It worked great, kept the speed exactly where it was set. The next time I went to use it it was a no go.
03-27-2016 01:41 PM
VapeGamer Tried procedure, got 0 flashes after (successful test). I've seen quite a few people mention brake light issues causing CC to not function. Anyone have a knowledge of the operating parameters to tell me whether LEDs would cause the same effect? Full LED conversion in the rear end on mine, bulbs only. In addition, my valve cover gasket has been a gremlin for the past couple months (I've had it off several times), and only noticed CC not working after this. I'd be more knowledgeable about the CC system, but I'm an Acura tech, haven't seen a cable CC to diag in a long time.
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