Ford Ranger IV 2020 - No OBD connection

[rokas]

Opened the module housing. This is what I found. There was definitely some kind of short caused by the housing touching the board.

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[RangerBill]

Opened the module housing. This is what I found. There was definitely some kind of short caused by the housing touching the board.

Does it work with the cover off?

 

[rokas]

Tomorrow I will try.

 

[airline tech]

At this point:

I would check - with PB Start (Attempt) - (Helper Required)

1. Check the Starter Relay - Coil - Power and Ground - are they being applied
2. HS1 - Can Bus activity (Does it fluctuate?) when the start signal is being applied - it should fluct slightly around the 2.5 volts (pressed) and then become stable after release
3. Does the (Check Eng) light - come on at key on

Note: since this has had airbag deploy - the BCM and RCM maresety have a (Crash Event) locked into memory - that may be preventing the start, the BCM should be able to reset, now will Forscan allow this (IDK) may require FDRS (for that deep of a level) the RCM however may need a replacement (or a bench level) reset - I would get com first to see what is being picked up by the RCM (before) we condemn it.

The Good - You have access to FDRS
The BAD - It requires a J2534 Passthrough adaptor - for use - the basic Forscan adaptors will not work. My Top-Don scanner has the adaptor (with it) and have used FDRS using this adaptor. The cheapest (non Ford) adaptor (adaptor only) that I know of is the Mongoose.

Being that the PCM does show damage - it actually does not look like that's actual (Circuit) burn as those appear to be standoff support for the board and I do not see any circuit trace - so impact damage (yes) actual short (IDK) - mainly only seeing a discolored board not melted etc. and yes it may work (if the cover is pulled up) taking the stress (flex) off of the board.

Another Curiosity Question.

The picture of the truck - along with the GWM (Salvage) pic:
Is this your truck or salvage truck pic?

 

[airline tech]

I dug deeper into the board and i think that those pins are actually power and ground feeds for the board - I can see 4 sets in the pic.
And I think this set may be the (feed for the 5-Volt) VREF circuit (step down regulation) as well as the internal 3.3 volts for the processor power as this would explain why the PCM appears dead as far a (Com) its not waking or booting up.
It may be worth a try and see if it will boot fully with the cover not touching the pin, you will still need a pcm, but at this point its just a test (how far can you get)

 

[rokas]

At this point:

I would check - with PB Start (Attempt) - (Helper Required)

1. Check the Starter Relay - Coil - Power and Ground - are they being applied
2. HS1 - Can Bus activity (Does it fluctuate?) when the start signal is being applied - it should fluct slightly around the 2.5 volts (pressed) and then become stable after release
3. Does the (Check Eng) light - come on at key on

Note: since this has had airbag deploy - the BCM and RCM maresety have a (Crash Event) locked into memory - that may be preventing the start, the BCM should be able to reset, now will Forscan allow this (IDK) may require FDRS (for that deep of a level) the RCM however may need a replacement (or a bench level) reset - I would get com first to see what is being picked up by the RCM (before) we condemn it.

The Good - You have access to FDRS
The BAD - It requires a J2534 Passthrough adaptor - for use - the basic Forscan adaptors will not work. My Top-Don scanner has the adaptor (with it) and have used FDRS using this adaptor. The cheapest (non Ford) adaptor (adaptor only) that I know of is the Mongoose.

Being that the PCM does show damage - it actually does not look like that's actual (Circuit) burn as those appear to be standoff support for the board and I do not see any circuit trace - so impact damage (yes) actual short (IDK) - mainly only seeing a discolored board not melted etc. and yes it may work (if the cover is pulled up) taking the stress (flex) off of the board.

Another Curiosity Question.

The picture of the truck - along with the GWM (Salvage) pic:
Is this your truck or salvage truck pic?

This is the truck I bought from the dealer as is.

 

[rokas]

Nothing changes with the PCM connected when the cover is not touching the pins. With the PCM plugged in, I probed those four sets of pins, and each pin shows 0.01 V.

 

[airline tech]

Then I suspect they may all be grounds:

PCM - Disconnected
Each Pin to - Case
Each Pin to - Ground Pins on the connector

I suspect you will find continuity

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