ok. what method of Voodoo do you use to definitively get into engineering mode on a 2015 Platinum??? I have tried every method I could find, with no luck (except for once, and couldn't duplicate it/figure out exactly what I did).... I have said the rosary, went to confession, sacrificed a bucket of fried chicken, offered some rum to Jobuu, but still can't get in.

 

For Lariat and up 8 inch Display:

1. Start with engine off.
2. Press and hold OK Button on the left side of the steering wheel and don't release it until the end.
3. Press Push Start Button only without touching the brake pedal to enact "Accessory Mode".
4. Once the message “Accessory Mode” appears press the brake pedal and turn the Engine on by pressing the Push Start Button again all while continuing to hold down the left OK button.
5. "Engineering Test Mode" should appear then release left OK button.

 

So those instructions didn't work for me... but because I'm an IT guy and can't let things go, I did figure out the steps that do work for me.. and I can do it without starting the engine...The key is the Airbag light under the tachometer...

1. Start with engine off.
2. Press and hold OK Button on the left side of the steering wheel
3. Press Push Start Button only without touching the brake pedal
4. Keep your eye on the airbag light... as soon as it goes off, let go of the OK button... that will make the gauges start clicking and spinning...
5. When the gauges stop dancing, hit the OK button and you are in Engineering Mode..
6. If you press the brake and start the engine now, it will stay in Engineering mode.
   
   
   You Tube

 

On a 2018 xlt, press the OK button and hold.
Turn Ignition on and wait for the Screen to say Engineering Mode, then release the OK Buton.
At this point, without the engine running, you can step to any cold reading.
If you want to see the charging system action, step to the Battery voltage reading using the UP or DN keys to get to the reading.
On good system, should see in the 12.1 to 12.4+/-.....NOTE voltage is read through the BCM not direct from the Battery and may be a couple tenths lower than a direct read at the Battery.
Watch the value closely for a min. value at cranking time. It offers an idea of Battery state of charge/ system health. Satisfactory Battery charge and health should not go below 9.5 volts momentarily.
After engine starts there will be several seconds before the voltage rises to full charge level. This is by BMS software control design intent for other reasons.
The voltage will be somewhere up to 14.9 v max. to recover the Battery and supply the rest of the vehicle needs at that time.
Battery recovery time depends on drive time, at this point.
The Data point steps consist of a mix of Decimal, Octal, Hex notation presentations and Temp.in Celsus.
One data point will indicate whether a code is set. 0 = none or a number if code is present.
When all code is cleared, this reading will be 0.
Can run in Enginering Mode as long as you want until shutdown, then it auto resets back to normal or you can set back to normal by pressing the OK Button for reset back to normal while engine is running or moving. Cannot go back to EM at this time unless ignition is turned off and do procedure again.

Good luck.

 

the voltage is at 12.2 at rest, and voltage doesn't drop below 10.1 during startup.... during a drive this afternoon, the voltage never got above 13.8....

 

Thats very good.
You have a good system level of operation.
.
Here is what to know about it.
The 12.2 is high on percentage SOC.
Dropping into the11 volt range on cranking shows a very low and good Battery resistance. That means the higher the Resistance the lower the voltage under cranking loads.
Therefore. the charge voltage 13.8 after starting does not have to be very high to recover the Battery drain from the cranking load put on it. Voltage difference between the Alternator output and Battery SOC is what forces Current into the Battery. As the Battery voltage recovers, the Charge voltage reduces by BMS Control sensing and changes the field winding drive, for output control changes.
.
This is the value of using the Engineering Mode to observe the dynamics of it and assess the health of the whole Power system by evaluating whet you see happening.
Good luck.

 

Good deal… so I know it’s not a battery issue with my keypad… any ideas? The keypad lights up when the door opens, but hitting the buttons does not make them light up, and hitting the bottom two buttons no longer makes it lock

https://www.f150forum.com/f118/door-...orking-574493/

 

Take a look for B, C, and U code set that would point to the part of the system in fault.
There are several separate paths to the Locks.
Remote lock and unlock through the RF Transceiver, from the Fob.
Last two digits of the outside Key-pad for Locking.
Axcess CODE Un-locking from the outside Key-Pad.
Inside switches.
These are for my 2018.
Don't know if there is a difference in other years/builds.
Good luck.