2015 ford transit no crank/no start UPDATE

surplus238 wrote: Hi guys, I notice that the audio mod is somehow involved in the starting system, has anyone had a problem with that?
One other symptom I had not thought about. when I turn the key on the radio comes on, I turn the radio off but the next time I turn the key on the radio comes on again

I believe that the ACM receives power, from Fuse 29, (which receives its power from Pin 37), when the key is turned to the "ON" position. The way Service Information labels Fuse 29 backs this theory up.

I do not have power at fuse 29 and have not had any there through this whole thing. I would really like to know which pins on the starter relay socket should have power and when.
I am going out now to get the van in the air and check out the wire damage.
A point of interest- the injectors flash a noid light but the plug coil connectors do not

surplus238 wrote: . I would really like to know which pins on the starter relay socket should have power and when.

The pin with the White/Green wire (2) gets power from Pin 37 of the PCM when the key is in the ACC or RUN position.
The pin with the Yellow wire (1) gets a Ground from Pin 7 of the PCM when the key is in the START position.

Copy and Past:

Powertrain Control Module (PCM)

The PCM provides power and ground to the starter relay to initiate cranking of the engine.




Starting System

The starting system controls the cranking of the engine. Under normal operation, when the ignition is turned to START, the PCM receives the following inputs:

Request to crank engine message from the BCM
PATS enable message from the BCM
Correct transmission park or neutral input from the automatic transmission

When the PCM receives the correct inputs, voltage and ground is supplied to the starter relay coil. When the starter relay coil is energized, it provides voltage to the starter solenoid, allowing the starter motor to crank the engine.

The PCM disengages the starter once an engine Revolutions Per Minute (RPM) threshold is reached, a set crank time is exceeded or the ignition is turned OFF.

Passive Anti-theft System (PATS)

This vehicle may be equipped with PATS . PATS disables the engine from starting if an unprogrammed PATS key is used or an invalid PCM ID is received. The PATS is controlled by the BCM . If there is a PATS concern that disables the engine, the IPC displays a corresponding message in the message center.

Well the wire problem was a hope but there was no damage to the wires, the plastic cover was chaffed but the wires were intact. I ran a scan on the system and find a PO161a-01 and a PO160a-2 the scanner tells me that the imobilizer does not match the PCM. I am wondering if the programer put the pats notation in when he programed the pcm

Even though the vehicle doesn't physically have PATS the BCM might still send a PATS message to the PCM.

static.nhtsa.gov/odi/tsbs/2017/MC-10127405-9999.pdf

It would seem that the PCM is looking for PATS in the BCM and mot finding it, my key programmer tells me that cannot find a imobileizer. There is no PATS light in the dash lights. I am going to be talking to Ford tomorrow as they programed the PCM from the vin # and it should give them all the information they would need.

Ok guys we have flashed the PCM but no change, ran codes again and on running the DTC's I am getting a fault 15 on the BCM and it tells me that there is no communication between the BCM and the PCM. L am looking at the wiring between the BCM and the PCM and I notice the violet with org goes to the awake on the PCM. Does anyone know what kind of signal I should get from the vt/og wire? I am getting a no fault message from the PCM.
By the way Chad, where do you get those nice wiring diagrams. I have taken the steering column apart and I do not have a PATS tranduce in the system.

Ok guys, an update, in the ford tsb's I found a tsb on the BCM, if it is replace it is possible that the new unit will not accept a flash, Ford is still working on the problem but I have bypassed the start wiring at the BCM and the van now starts and runs. The # 29 fuse only activates the ACM and is only powered when the key is in the start position, it has nothing to do with starting. I am not going to buy another BCM unless Ford finds a fix foe the problem. The van works fine this way.

what was the fix and what wires did u bypass and how

Cicero71 wrote:

what was the fix and what wires did u bypass and how

I have bypassed the start wiring at the BCM

I can't say for sure but, my guess is that he supplied battery voltage to Circuit CDC35 (BLU/WHT).

I'm curious why you think you have the exact same problem. What testing have you done?

Good Day Chad, Reason being I have the exact same issues. Down to a tee as he did ran all of the same test still no ans. So at this point I want to go with the bypass

Hey Chad! I'm new to the forum but you seem super knowledgeable about these vans. I have a 2015 transit with the same issues after attempting a stereo swap. The van ran fine and would crank and start after the install but the battery went dead in the middle of some connections being made (yes, I know why was the battery connected) and now will not crank or start. All lights on dash illuminate, no PATS light or even one on this model ( I don't think) help!!!