Throwing multiple CAN module codes this morning..

[Quiker]

I'm throwing
- U0199 - lost communication with door control module a
- U0200 - lost communication with door control module b
- U0252 - lost communication with lighting control module - rear b
- U0256 - lost communication with front controls interface module
- U0164 - lost communication with HVAC control module

I went through fuses 23 - 32 in the passenger footwell - all good.

any ideas?

 

[FordTechOne]

Any symptoms? Or just DTCs?

 

[Quiker]

Any symptoms? Or just DTCs?

door locks don't work, ac doesn't work, radio power on/off doesn't work, srs disabled, blind spot detector disabled, ..... it's like the CAN bus has been interrupted

 

[Quiker]

well - here's a twist....
driving - everything works - as long as my foot is on the gas pedal. once I pull my foot off - everything dies - the radio volume/power, the door locks, the airbags, the blind spot, the ac ...etc - I touch the gas - everything works.

even when parked and not running - the door locks don't work - I push the gas - the door locks work....

what in the evil is going on......

 

[jdholder]

Low voltage. Replace battery.

 

[Quiker]

Nope - coincidentally new battery two weeks ago.

I dig into the accelerator - unplugging the one connector - made no difference.

So I grabbed and moved the cables coming out of the top (no connectors in sight) and sure enough - it’s fix…..

For now - something is obviously loose/kinked

 

[skidmarcx]

Check for loose battery connections (especially if you had someone else do the install), what is charging system voltage at? If nothing else maybe an all module reset?

 

[Quiker]

Here's was one of the funny moments.

Truck is off.
Driver's door open.
the unlock/lock buttons on the door not working.
I lean over a barely push the accelerator.
the unlock/lock buttons work.
- same with the radio on/off knob/volume/knob, AC controls, air bag readiness, blind spot, .... all start working.

let off the accelerator - everything dead.

so that's what lead be to look at the wiring around the accelerator.

 

[smurfslayer]

what are the 2 most recent mods, updates, changes or maintenance?

Nope - coincidentally new battery two weeks ago.

That doesn’t mean it’s a good battery, or that you don’t have something else compromising the battery. Did you reset the BMS after replacing the battery?

 

[Quiker]

That doesn’t mean it’s a good battery, or that you don’t have something else compromising the battery. Did you reset the BMS after replacing the battery?

Well - if the thought was - battery weak and when I step on the gas the alternator makes up for additional voltage/amperage - see in my last post

Same behavior when the truck was turned off. everything dead, slight push on the accelerator pedal - everything works. Again - truck off.