Ford Ranger IV 2020 - No OBD connection

[airline tech]

I am confused as to what you are checking - 3- > 3

I am wanting to know (using a meter) and this EXAMPLE of a GWM - not exact part number

Front DLC - Pins 1 through 16

Where do they pinout (Here)?

This way I can determine if the GWM you have will power match your wiring connector C2431 or someone has swapped in a wrong part number GWM.

We can use that information - to see what pins here (in this example only) match up to your actual harness - this will also show by DLC to these pins - show where the data loss is at.

It will also be a good idea to contact a local dealer and find what part number - should be installed (Vin # - match)

So starting at Pin 1 on the DLC side - do you have continuity to any pin on the back side and continue for each pin - Pin 2 - to all of these - is there continuity?

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[airline tech]

Another item to note - and I think you are saying - if we look at Pins 2-5 - we know your harness does not have the wires - but are there pins on the module for them?

can you take a pic of the back of the module C2431 connection point?

 

[RangerBill]

Another item to note - and I think you are saying - if we look at Pins 2-5 - we know your harness does not have the wires - but are there pins on the module for them?

can you take a pic of the back of the module C2431 connection point?

I am wondering if those unused pins might be used to run to a remote Data connector located on the right side of a right-hand drive vehicle.

 

[rokas]

Sorry for late response. This is what I have

 

[rokas]

OBD -> GWM
1 -> empty
2 -> empty
3 -> 3 (there is no wire going to this pin)
4 -> 1 (matches your diagram)
5 -> 14 (matches your diagram)
6 -> 5 (there is no wire going to this pin)
7 -> empty
8 -> empty
9 -> empty
10 -> empty
11 -> 2 (there is no wire going to this pin)
12 -> empty
13 -> empty
14 -> 4 (there is no wire going to this pin)
15 -> empty
16 -> 13 (matches your diagram)

what I mean by "there is no wire going to this pin" is that wires connector has no corresponding wire going to GWM

 

[airline tech]

So we can confirm - that the GWM is not (internally) splicing the circuits

Did you confirm that (NONE) of the Front DLC - pins connect to Pins 17 through 20?

You have the Pins on the module - to match the wire harness, so we need to know if (DLC Pin 3 will only route to Pin 3) it may also route to Pin 18.

Basically the GWM may be internally circuited to cover both (options) for the wire harness, IDK if you checked all of them or just stopped at pin 3.

If Pin 3 DLC etc do not touch the pins 17 through 20 - then the HS1 & HS2 can circuits cannot reach the GWM and this module (would be the wrong part number) I would confirm with a local dealer (using the VIN #) of the correct part number that should be installed.

One noted (Indicator) (?) is the Mfg Date that is on the module and you have a 2020, this may be a clue that it has been replaced from a salvage truck

Hopefully a new module (if it is determined) that it is needed will let you connect without programming it first (basically it should be downloaded) to tool before replacement - since you cannot connect - may give you a roadblock, hopefully it will connect and then you will need to connect and program it (via scan tool) it will need a software load that can be downloaded from the ford servers.

What scan tool are you using? and what adaptor are you using?

Double Check and Ensure these are dead circuits

DLC Pin 3 to Pin 18
DLC Pin 6 to Pin 20
DLC Pin 11 to Pin 17
DLC Pin 14 to Pin 19

also double check - if any pin in the DLC - touches Pins 17 through 20, I have a hunch that the GWM may be internally circuited to cover both sets of pinouts (Pins 2 through 5) and (Pins 17 though 20)

 

[rokas]

So we can confirm - that the GWM is not (internally) splicing the circuits

Did you confirm that (NONE) of the Front DLC - pins connect to Pins 17 through 20?

You have the Pins on the module - to match the wire harness, so we need to know if (DLC Pin 3 will only route to Pin 3) it may also route to Pin 18.

Basically the GWM may be internally circuited to cover both (options) for the wire harness, IDK if you checked all of them or just stopped at pin 3.

If Pin 3 DLC etc do not touch the pins 17 through 20 - then the HS1 & HS2 can circuits cannot reach the GWM and this module (would be the wrong part number) I would confirm with a local dealer (using the VIN #) of the correct part number that should be installed.

One noted (Indicator) (?) is the Mfg Date that is on the module and you have a 2020, this may be a clue that it has been replaced from a salvage truck

Hopefully a new module (if it is determined) that it is needed will let you connect without programming it first (basically it should be downloaded) to tool before replacement - since you cannot connect - may give you a roadblock, hopefully it will connect and then you will need to connect and program it (via scan tool) it will need a software load that can be downloaded from the ford servers.

What scan tool are you using? and what adaptor are you using?

Double Check and Ensure these are dead circuits

DLC Pin 3 to Pin 18
DLC Pin 6 to Pin 20
DLC Pin 11 to Pin 17
DLC Pin 14 to Pin 19

also double check - if any pin in the DLC - touches Pins 17 through 20, I have a hunch that the GWM may be internally circuited to cover both sets of pinouts (Pins 2 through 5) and (Pins 17 though 20)

Did you confirm that (NONE) of the Front DLC - pins connect to Pins 17 through 20? - yes

Basically the GWM may be internally circuited to cover both (options) for the wire harness, IDK if you checked all of them or just stopped at pin 3. - checked all

If Pin 3 DLC etc do not touch the pins 17 through 20 - then the HS1 & HS2 can circuits cannot reach the GWM and this module (would be the wrong part number) I would confirm with a local dealer (using the VIN #) of the correct part number that should be installed. - I will do this.

What scan tool are you using? and what adaptor are you using? - I do have forscan, but I also tried standard elm obd connector.


Double Check and Ensure these are dead circuits

DLC Pin 3 to Pin 18
DLC Pin 6 to Pin 20
DLC Pin 11 to Pin 17
DLC Pin 14 to Pin 19 <--- All dead

also double check - if any pin in the DLC - touches Pins 17 through 20, I have a hunch that the GWM may be internally circuited to cover both sets of pinouts (Pins 2 through 5) and (Pins 17 though 20) -> there are no pins from DLC side which would have contact with Pins 17 through 20 from GWM side.

The only thing I could think of now is that there must be some conditions for splicing to happen, but I'm not sure if that's even realistic.

 

[airline tech]

Then this confirms that GWM cannot communicate to the truck as it cannot see the main busses HS1 & HS2 - I would check with dealer for correct part number (most important) is the dash #

Possible Correct (-#) = BA - BC or AD - Your Market and LH Drive (Engine Installed?) may be part of the difference for dash numbers
Once the correct (-#) is installed it still will not start until you program it - (As-Built) data , you should gain communication but you will need to find your as built data for the GWM (Ford Services.com) and then either upload it or physically write each line of data to the new GWM. once that is completed you should be able to start the truck.

So just a FYI - it will require programming which Forscan can do, one of its benefits (strengths)

 

[RangerBill]

OBD -> GWM
1 -> empty
2 -> empty
3 -> 3 (there is no wire going to this pin)
4 -> 1 (matches your diagram)
5 -> 14 (matches your diagram)
6 -> 5 (there is no wire going to this pin)
7 -> empty
8 -> empty
9 -> empty
10 -> empty
11 -> 2 (there is no wire going to this pin)
12 -> empty
13 -> empty
14 -> 4 (there is no wire going to this pin)
15 -> empty
16 -> 13 (matches your diagram)

what I mean by "there is no wire going to this pin" is that wires connector has no corresponding wire going to GWM

Have you checked to see if the PCM (powertrain control module) is powered up? The North American gas Rangers have a relay in the BJB (battery junction box) that powers up the PCM. I would check for VPWR and ISP-R having battery voltage.

I don't know how different your Ranger is (diesel?) from ours.

 

[airline tech]

The curiosity question is:

Is there continuity between pins:

2 - 17 - HS2 (-)
3 - 18 - HS2 (+)

4 - 19 - HS1 (-)
5 -20 - HS1 (+)


1. I am wondering (since the GWM is pinned to handle different configurations - truck to GWM.
Is there a programing issue (configure) the front DLC ports to open up 17-20 for diagnostic scan tool communication? IDK

2. We cannot (see) a breakdown of the GWM (As-Built) data like we can on the other modules, so I cannot fully determine (if a programming) issue is the cause and it may be just the GWM lost programing (hey use pins 17-20) instead of 2-5. this is what sparked my curiosity to see if they are (internally bussed together) - from the GWM (standpoint) not the DLC half.

3. Why I question this - Its due to getting (60 Ohms) on all networks while back probing) - the only thing that makes sense is that there is still a terminating resistor (installed) on the circuit board. - the busses are powering up (confirmed) but the GWM is blocking any communication between the busses.

4. The GWM has a date printed on it - 2017 - that makes me (?) this installed on a 2020 Ranger, could we be wrong is assuming (its the wrong part number - yes) - Is the GWM and DLC issue a highly suspect cause of no start and no scan com (yes)

5. This is where (if you have - opens) between 2-17 - 3-18 - 4- 19 , 5-20 , will 100% confirm wrong part number - this is where I think you may find actual continuity - reason the 2-5 pins are here along with pins 17-20. (Flip a coin - here) they may be bussed together at this end - but only bussed to DLC side com (2-5) (Possible - Programming through port configuration)

6. Possible Solution - Repin the connector to move the bus wires up - 2-5 - but if this is required then its better to get the actual part number that is wired to use 17-20.

 

[rokas]

Double checked the continuity

2 - 17 - HS2 (-) - nothing
3 - 18 - HS2 (+) - nothing

4 - 19 - HS1 (-) - nothing
5 -20 - HS1 (+) - nothing

Pin 2 has only continuity with pin 3 (120 omh). The same with pin 4 it only has continuity with pin 5 (120 omh).

Contacted the local dealer. Based on the VIN number the module I have should work.
Maybe I have missed something. I will try to double check everything on the truck again. Not sure if I I will be able to do this today, but I will definitely report on my findings as soon as possible.

I am amazed by the support. Thank you very much!

 

[rokas]

Have you checked to see if the PCM (powertrain control module) is powered up? The North American gas Rangers have a relay in the BJB (battery junction box) that powers up the PCM. I would check for VPWR and ISP-R having battery voltage.

I don't know how different your Ranger is (diesel?) from ours.

I will check it. Thanks!

 

[airline tech]

Ok -if dealer says it should be good - then before I would spend money on a (Possible) bad or incorrect GWM , I would try another scan tool or the OBD Link - EX , the proven adapter that works- as we are at a crossroad , the no start issue may have nothing to do with the (no com) issue
Once com is established, you will have some sort of direction of T-Shoot.
If not even cranking but you have ignition and everything powers up (appears normal) then I think it’s a PATs issue, the FOB you have ( is it the OEM FOB?

 

[rokas]

Ok -if dealer says it should be good - then before I would spend money on a (Possible) bad or incorrect GWM , I would try another scan tool or the OBD Link - EX , the proven adapter that works- as we are at a crossroad , the no start issue may have nothing to do with the (no com) issue
Once com is established, you will have some sort of direction of T-Shoot.
If not even cranking but you have ignition and everything powers up (appears normal) then I think it’s a PATs issue, the FOB you have ( is it the OEM FOB?

Totally agree that no start issue may have nothing to do with the (no com) issue. Regarding the FOB - keys look original and they do work (lock, unlock, ignition). Start button is blinking (green).

Today I was unable to check the truck further. Hopefully tomorrow.

 

[airline tech]

Ok - Provide more details


I think that since you have a (No Com and No Start) and noted wire mismatch, it may be a good idea to replace the GWM or at least try another scan tool or Forscan Adaptor, just something to possibly get past (no com)
What we need is a (RH Drive) truck to see how the harness is wired - are the wires on 2-5 or are they the same as you have?

I cannot get past the wire mismatch and hate to have you shotgun a part at it - but since unknown history (GWM Replaced) with wrong part - (?) and the owner did not realize it and had dead truck and sold it. (?)

I would say replace the GWM and go from there - at least it will get (Com) and then venture into getting it programed - for starting

as far as the no start more info needed - to help determine if this is strictly data block at the GWM or is there another power issue

We can verify that the BCM is powered - Door Locks and Start Button (Indicator), but i think once it hits the GWM its blocking (can bus) data from going anywhere

Engine Installed?
Do you have brake lights? - Push button start (requires brake pedal input)
Do you know if the truck ever ran (after accident)?
Was there any repairs done or was this simply bought at auction (totaled or as-is) salvaged title
Exactly what was damaged - details of damage may reveal wire harness or fuse damage?

If this is a 2.3 engine - when you open the door - do you hear the wastegate cycle?

Have you checked every fuse and relay - PCM Power Relay / Starter Relay / Run Start Relay
are any of these clicking - when cycling the ignition or opening the door

Tell me what power you have - when the PB switch is (On) and flashing

IPC - Full Power Up and any messages noted
APIM - Radio - Power Up and play music
FCIM - Climate Controls work - blower motor
Does all the background lighting and exterior lighting work?

What features actually work - can you turn off the radio, turn signals work - I am looking for can bus data - transition from buss to buss - i will look to see what a (yes) would be its transferring data - something that would show - let me do some digging for some things that would be a good test - - like indications on the IPC when you switch something off - such as traction control - will it show in the IPC, this would be an example of bus transfer (via the GWM)

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