Crazy electrical issues??? BCM? - Ford Mustang Forum
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post #1 of 15 (permalink) Old 4 Weeks Ago Thread Starter
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Crazy electrical issues??? BCM?

My 2014 GT Coupe (non convertible) is acting up and I think its the BCM? But I'm not 100% sure.
Here are my symptoms:
1. Gauge cluster started tweaking out one day, I assumed it was battery, which died a week later of not even using the car (new battery of a year or so) - I replaced that.
2. Now my guage cluster still acts up, I get TPMS sensor failure, It looks like a christmas tree lighing up when I start it. Gauges flip out up and down, etc. I checked most of the fuses in the passenger fuse box and the under hood fuse box, they seem fine. HOWEVER I did notice water under the fuse box in engine bay...which is very concerning.
3. Turn signals and headlights do not power on despite being switched on and off. AC/heater does not work, hazard lights do not work, trunk does not open from key or from trunk button. Radio is ON but no lights, I can adjust volume from Sync steering controls but not form the radio itself. My windows roll up and down, brake lights work, TCS turns on and off with button, same button set that wont turn on the hazards and trunk actuation though.
4. Sometimes while driving random things will pop up, BRAKE light stays engaged, door open alert turns on.
5. Consistent issue is TPS failure showing no matter what.
6. I have tested alternator, starter and all are good, plus its a new battery after the last one got drained..

Has anyone experienced this? Im thinking to swap out the under engine fuse box but from what Ive read it is the BCM-2 or the control box in the trunk, can anyone attest to that?

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post #2 of 15 (permalink) Old 4 Weeks Ago
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You need to get codes off all the modules. Cheapest thing is probably FORSCAN

https://forscan.org/forum/viewtopic.php?f=6&t=2540

https://forscan.org/download.html


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post #3 of 15 (permalink) Old 4 Weeks Ago Thread Starter
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Quote:
Originally Posted by OX1 View Post
You need to get codes off all the modules. Cheapest thing is probably FORSCAN

https://forscan.org/forum/viewtopic.php?f=6&t=2540

https://forscan.org/download.html
I managed to pull the codes, and used FORSCAN software (great recommendation).

Here's what I'm seeing, I guess what connects all these modules together is the probably the root cause? That or the IPC is the cause?
I made alternating indents for ease of reading/tracking...

Thanks!


Code: U0155 - Lost Communication With Instrument Panel Cluster (IPC) Control Module
Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC
Module: Accessory Protocol Interface Module
Code: U016A - Lost Communication With Global Positioning System Module
Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC
Module: Accessory Protocol Interface Module

Code: U0255 - Lost Communication With Front Display Interface Module
Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC
Module: Accessory Protocol Interface Module

Code: U0256 - Lost Communication With Front Controls Interface Module A
Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC
Module: Accessory Protocol Interface Module

Code: C0049 - Brake Fluid Level
Additional Fault Symptom:
- Low Fluid Level
Status:
- Previously Set DTC - Not Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC
Module: Antilock braking system

Code: U0253 - Lost Communication With Accessory Protocol Interface Module
Status:
- Previously Set DTC - Not Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC
Module: Restraint Control Module

Code: U0140 - Lost Communication With Body Control Module
Additional Fault Symptom:
- Missing Message
Status:
- Previously Set DTC - Not Present at Time of Request
- Malfunction Indicator Lamp is On for this DTC
Module: Instrument Panel Control Module
Code: U0164 - Lost Communication With HVAC Control Module
Additional Fault Symptom:
- Missing Message
Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC
Module: Instrument Panel Control Module

Code: B10DA - PATS Target Identifier
Additional Fault Symptom:
- Signal Invalid
Status:
- Previously Set DTC - Not Present at Time of Request
- Malfunction Indicator Lamp is On for this DTC
Module: Instrument Panel Control Module

Code: B1218 - Transmitter Identification Code
Additional Fault Symptom:
- Not Programmed
Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is On for this DTC
Module: Instrument Panel Control Module


Vehicle Config Information:
Note: I censored VIN and mileage just for the hell of it.
Quote:
Interface:
Port: COM4, 38400 kbps
Type: Bluetooth
Adapter: ELM327 v1.5
Min.delay: 35 ms ( Average)
Errors: None

Vehicle:
Model: Ford Mustang
Engine: TiVCT
Capacity: 5.0L
Year: 2014
Generation: 2014 MY
Fuel: Gasoline
Transmission gear: Manual
VIN: XXX

PCM - Powertrain Control Module
Part number: DR3A-12A650-ACE
Strategy : DR3A-14C204-ACE
Hardware type: DR3A-12B684-BA
Total Distance: XXX

OBDII - On Board Diagnostic II

APIM - Accessory Protocol Interface Module
Part number: ER3T-14D212-AB (latest known: ER3T-14D212-AE)
Strategy : DL3T-14D205-AB

ABS - Antilock braking system
Part number: DR33-2C219-AD
Strategy : DR33-2D053-AD
Calibration: DR33-2D054-BBC

RCM - Restraint Control Module
Part number: DR33-14B321-AC
Strategy : DR33-14C028-AA
Calibration: DR33-14C098-AC

PSCM - Power Steering Control Module
Part number: CR33-3F964-AC
Strategy : CR33-14D003-BA

IPC - Instrument Panel Control Module
Part number: ER33-10849-AE
Strategy : ER33-14C026-AD
Odometer: XXXX

OCS - Occupant Classification System Module
Part number: DR33-603B16-AA
Strategy : CR33-14F595-AC
Calibration: CR33-14F596-AC
Software version: v2 2010-07-02
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post #4 of 15 (permalink) Old 4 Weeks Ago
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Unfortunately, lost communication codes happen all the time on Fords.
It doesn't necessarily mean anything is wrong with either module.

I bought an Autel bi-directional scanner and scanned our brand new 17 Escape, 2.0,
with 700 miles on it (and nothing wrong with it) had a couple lost comm codes.

I would make note of them and other codes, clear everything out and see what comes back up
just by turning on ign, then maybe move to what else comes up upon startup.
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If you still believe the BCM is damaged you might want to look around the BCM for moisture, indicative of a plugged plenum drain under the passenger side cowl. When those plug up you can get water intrusion in the cabin which can damage the BCM. If the water intrusion is recent it might not have an odor yet but if you peel the passenger carpet back you can feel it on the floor board.
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Quote:
Originally Posted by ONEZ ST View Post
If you still believe the BCM is damaged you might want to look around the BCM for moisture, indicative of a plugged plenum drain under the passenger side cowl. When those plug up you can get water intrusion in the cabin which can damage the BCM. If the water intrusion is recent it might not have an odor yet but if you peel the passenger carpet back you can feel it on the floor board.
Is there a module in the trunk called BCM? I read on some mustang forums that the passenger module is the smart junction box (sjb) and the BCM is in the trunk?
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I was also kinda wondering what is the "BCM" ; that is a new one on me
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Quote:
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I was also kinda wondering what is the "BCM" ; that is a new one on me
Typically it is body control module.............
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86 Capri, 5.0, 5Spd, A9L QH/BE, 47 lb Inj PMAS 3" MAF, Single T44 Turbo, Front Mount IC, TW170's, Stock Cam, Explr Intake/TB, 1.7 Rockers, CF dual friction clutch, 3" DP, 2.5" full Exh, 3.27's, 11.932 @ 115.78
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Quote:
Originally Posted by JBert View Post
I was also kinda wondering what is the "BCM" ; that is a new one on me



I was wondering the same thing. Now we know thanks to OX1

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Box under passenger kick panel. Plugged cowl vent or a leaking A-Pilar can cause water to damage it over time.
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Quote:
Originally Posted by OX1 View Post
Typically it is body control module.............
thanks, that was my guess based on the letters but I don't remember hearing it before

Quote:
Originally Posted by ONEZ ST View Post
Box under passenger kick panel. Plugged cowl vent or a leaking A-Pilar can cause water to damage it over time.
I thought that was the "SJB" system junction box or something like that? I guess it doesn't really matter, sorry OP for minor tangent, just curious
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The box in the trunk near the spare tire location is also referred as a BCM. I think BCM-B or BCM-2. Its primary purpose is tail lights. But from the symptoms the OP listed it sounds like the module upfront in the passenger compartment.

But I'll be honest and tell you that me and electrical are like gas and flame. Not a good combo. I'll replace fuses and bulbs, boxes and batteries, but if it involves chasing wires forget it.

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I just replaced the Smart Junction Box on my 05 because of water. It did the same as yours. Everything would go crazy and then fix its self, right up until all the lights went out at 8 pm in a snowstorm 700 miles from home. I had taken it out and cleaned and dried everything thought it was good until bang no lights at 50 mph in a very dark place with a couple of semis behind me. I put in a new one and everything is happy now and not nearly as scary
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Quote:
Originally Posted by earldavis1 View Post
I just replaced the Smart Junction Box on my 05 because of water. It did the same as yours. Everything would go crazy and then fix its self, right up until all the lights went out at 8 pm in a snowstorm 700 miles from home. I had taken it out and cleaned and dried everything thought it was good until bang no lights at 50 mph in a very dark place with a couple of semis behind me. I put in a new one and everything is happy now and not nearly as scary
I just replaced my SJB with an identical model number off eBay, but I think I need to program the unit now? When I turn the key I get no Power or anything, if you programmed yours do you have a manual?
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post #15 of 15 (permalink) Old 2 Weeks Ago Thread Starter
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Anyone have any experience replacing the SJB?
I just installed a replacement from Ebay - the model number is identical, all the fuses are the same as well. After installing the box and re-attaching my battery, my headlights stay on, but when I put the key in ignition and turn to AC ON, my dash doesnt light up, radio wont start, no noise, nothing. I can hear some vacuum or whatever, its the normal sound you hear when you turn the key on most cars. But all the items attached to the SJB wont turn on. I can roll down the windows and pop the trunk, the key fobs wont work to unlock the doors though. My concern is the dash not lighting and the radio not starting. Do I need to program the SJB? I havent tried turning over the engine yet...

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