2013 Limited Ex not receiving fob signals. HELP!!!!

[sheltonfilms]

*******Post Deleted due to wrong information******

 

[sheltonfilms]

Disregard previous post:

When the Intelligent Access (IA) key is activated by one of the low frequency passive start antennas, the transmitter in the Intelligent Access (IA) key sends a radio signal to the TPM module. The TPM module then communicates the command to the RFA module and the RFA module either switches the ignition to the requested mode or starts the engine.

The TPM module receives voltage at all times and has a dedicated ground circuit. The TPM module sends TPMS information over the MS-CAN to the BCM . The TPM module sends all RKE and Intelligent Access (IA) key information and requests to the RFA module through a dedicated single circuit network.

In the event of a failure with the TPM module, the vehicle experiences a no-start unless the Intelligent Access (IA) key is placed in the backup slot.

 

[sheltonfilms]

Ok here is something interesting if we disregard the code that was found earlier:

NOTE: The Intelligent Access (IA) feature is a programmable parameter and can be enabled/disabled with a scan tool. If the feature is disabled, the Intelligent Access (IA) feature to enter the vehicle and passive starting will be inoperative. To start the vehicle, the Intelligent Access (IA) key has to be placed in the backup slot.

Who did the work to the vehicle to fix it from the wreck? Were any modules replaced?

Please provide all the information you can (timeline, parts replaced, who did it, did it ever work correctly that you saw).

Somehow this setting could have been changed.

@jmr061 Do you know where this setting is stored? BCM? RFA?

 

[koeniky]

Ok here is something interesting if we disregard the code that was found earlier:

NOTE: The Intelligent Access (IA) feature is a programmable parameter and can be enabled/disabled with a scan tool. If the feature is disabled, the Intelligent Access (IA) feature to enter the vehicle and passive starting will be inoperative. To start the vehicle, the Intelligent Access (IA) key has to be placed in the backup slot.

Who did the work to the vehicle to fix it from the wreck? Were any modules replaced?

Please provide all the information you can (timeline, parts replaced, who did it, did it ever work correctly that you saw).

Somehow this setting could have been changed.

@jmr061 Do you know where this setting is stored? BCM? RFA?

Ford worked on car on two seperate occasions specially for IA. They kept getting code for no comm with TPSM. I had replaced module with another module but it was taken from an salvaged vehicle and I think the number of pins were different. I plugged my old TPSM module in and no change.

Front left axel, front left control arm, front left strut and radiator were replaced. Left fog light didn't works so we had to splice right fog light and run hot to left side. Grounded from left side harness. Fog light works. Local repair man did the replacement work. Few airbags were replaced along with new tensioner on driver seat belt. Restraint module was also reset with new clock spring as well.

IA never worked for me. Even before the repairs.

I unplugged the TPSM module and got code error codes about module and tire pressure.

 

[sheltonfilms]

Did you ever get power to the TPMS module? You stated that you couldn't get a hot wire and thought the pigtail/wiring was messed up (post 15 and 16)

 

[koeniky]

I have hot wires running to the module.

If I buy a new TPSM do I need to have it programmed at Ford for it to function?

 

[96firephoenix]

A non-communication fault in CAN systems almost always indicates a wiring fault. If one component fails, it has the potential to disable the whole CAN system.

IIRC, the fog lamps are CAN controlled, not relay controlled like on older cars... your hack into the right side fog light instead of replacing/patching the left side the harness may be causing problems.

If the ambient air temp sensor is on the CAN bus with the TPMS and the IA system, this could be causing problems, especially if there's a short somewhere in that circuit.

You want to see the crazy random problems from a wreck, take a look at the IIHS tests on youtube, and you'll see damage completely unrelated to the impact. There was one where the car was t-boned on the driver's side, and the passenger side mirror trim came off... so this impact to the front side could have easily damaged wiring throughout the vehicle.

 

[koeniky]

Geeze. That information makes me feel like diving into this problem would have me endlessly searching for a needle in a hay stack. Mechanical problems I excel at, electronical/wiring not so much.

 

[sheltonfilms]

Fog lights are relay controlled (internal relay in BCM) and ambient temp sensor is not on a can bus.

Ok so here are my thoughts then:

RFA module works because you can start with the key in the console.
TPMS works (we think) because when it's unplugged it throws errors.

Have error code for communication between RFA and TPMS so it is definitely looking like the communication between RFA and TPMS. Both units use CAN but the system for starting and unlocking uses a direct communication line (K-line) which is a single wire communication line.

This to me is the one that should be looked at.

Check this diagram out:

http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=1009139

It goes from pin 1 of RFA to pin 3 of TPMS. I would unplug both modules and check for continuity between the two pins to make sure that wire isn't broke.

 

[koeniky]

Ok. Will do. Is there an easy was to access the RFA and where is it located?

Also, is there a simple way to explain how to test Continuity for the wires?

And thanks again for your help.

 

[sheltonfilms]

Let me get back to you on accessing it.

Checking continuity is making sure you have a continuous unbroken wire. An unbroken wire will have a resistance close to 0 Ohms (real life is less than 3 ohms). A broken wire will have a resistance of 10,000 ohms or more.

Take a multimeter set it to OHms (upside down horseshoe) and place probes on each end of the wire you are testing.

Here it is. May or may not have to remove glovebox.

 

[koeniky]

I'll give t a shot. I really appreciate the help

 

[champco]

Really great thread cept for Koen's tbl. Koen just a thought here. You are not to far from JRM and it may help to put two heads together even as obviously you do well. Pm him with the idea. He ain't free. He has a lot of experience. But it will be better than going after market parts.
Good Luck.

 

[koeniky]

Ok here is something interesting if we disregard the code that was found earlier:

NOTE: The Intelligent Access (IA) feature is a programmable parameter and can be enabled/disabled with a scan tool. If the feature is disabled, the Intelligent Access (IA) feature to enter the vehicle and passive starting will be inoperative. To start the vehicle, the Intelligent Access (IA) key has to be placed in the backup slot.

Who did the work to the vehicle to fix it from the wreck? Were any modules replaced?

Please provide all the information you can (timeline, parts replaced, who did it, did it ever work correctly that you saw).

Somehow this setting could have been changed.

@jmr061 Do you know where this setting is stored? BCM? RFA?

Dumb question, but the battery was completely dead when I bought it after the wreck. Could the dead battery or the accident itself cause something to electrically disable the IA system you mentioned.

 

[sheltonfilms]

Dumb question, but the battery was completely dead when I bought it after the wreck. Could the dead battery or the accident itself cause something to electrically disable the IA system you mentioned.

It shouldn't have but anything in the realm of electrical is possible.

The communication error is the key. If that parameter was disabled that error still shouldn't be there.

 

[sheltonfilms]

Have you been able to test the wire yet?

 

[koeniky]

I am having a hard time locating the RFA because I can't find any videos on how to remove glove box.

 

[sheltonfilms]

I am having a hard time locating the RFA because I can't find any videos on how to remove glove box.

 

[peterk9]

I am having a hard time locating the RFA because I can't find any videos on how to remove glove box.

Not much that isn't on the Forum.
This might help as well.
http://www.explorerforum.com/forums/index.php?threads/cabin-air-filter.327749/#post-2883372

Peter