[Jaguarandi]

pcm is locked or what? earlier i don’t have the same problems with “security immobilization”

help pls

 

[Jaguarandi]

It's usually the BCM not the PCM, that gets corrupted with low voltage. I suggest you check the module info for the BCM to see if the VIN and part numbers look ok, and also check that the windscreen washers work.

Though the BCM can be corrupt even if the module info and windsceen washers work ok. The only way to know for sure is to attempt to read eeprom with a BDM programmer.
See https://www.jaginfo.org/posts/2948062/

vin and windscreen washers ok

 

[Jaguarandi]

Since it's just the central locking not working, maybe it's worth trying to reprogram the drivers door module.

how to do it? 🤔

 

[Jaguarandi]

Debug files during "Security - Immobilization" procedure.

 

[Jaguarandi]

 

[Jaguarandi]

Tried to use function "Configure existing module - Driver's door module" and after "Security - Mobilization". Didn't help
The screenshots show the current state of the machine.

 

[Jaguarandi]

It does look like it's failing with the PCM ( getting the random seed perhaps, but maybe those logs are just that way ).
Maybe try disconnecting power from the PCM for a few minutes in the hope of getting it back into a reasonable state. ( Or the battery if it's too difficult to disconnect power from the PCM ) Then try to program it again.

Hopefully no one has tampered with the PCM ( remap etc ), and somehow locked it.

No one has gotten into the PCM or removed any control boxes during my ownership. Could it be locked due to Car Scanner (iOS app) via WIFI Super OBD? I have experienced voltage sag in the car 3 times before and the Immobilization function worked fine. And hint, are PCM and BCM different things?

 

[Jaguarandi]

I've no idea why the PCM seems to be rejecting the connections, was just speculating remap/DPF delete people might try and block access somehow to prevent it getting put back to normal accidentality. Maybe a power cycle ( battery disconnect or pull the fuses for it if you can find out which ones ) might unjam it.

PCM is the Engine management module ( under the cowl panel at the bottom of the windscreen on the passenger side). BCM is the Body control module ( in the right hand front footwell, it's also known as the FSJB, and CJB )

Are all those codes current?
Looks like you either have issues with BCMB, or a broken boot loom ( issues with number plate lights, and tail lights on the boot lid. )

Did you have a power supply connected to the car when you flashed the PCM?
( 50A 13.4-13.8V is the advised spec )

Does you car have a heated steering wheel?

Does the module info on BCMB look ok?

Did you have a power supply connected to the car when you flashed the PCM?
( 50A 13.4-13.8V is the advised spec )

- No, but it says success.

Are all those codes current?
Looks like you either have issues with BCMB, or a broken boot loom ( issues with number plate lights, and tail lights on the boot lid. )

- Current i think. BCMB looks ok, VIN is ok. Number plate lights just rip, there is everythink ok with camera, lights and etc.

Does you car have a heated steering wheel?

- Is working too.

 

[Jaguarandi]

Have you checked the BCM for water ingress? ( lots of threads on it, search "CJB water ingress" )

No. But this situation happened after a battery sag on the car, everything was fine before. I doubt it could be due to water.

Well that may well explain why you're PCM is "locked". Best make sure you get a PSU before you flash anything else!

Need to try configure PCM with connected supply? Tomorrow I'll try to reset adaptations of PCM and something else.

 

[Jaguarandi]

You really need to get yourself sorted out with a power supply ( and I didn't say battery charger ), before you attack it with SDD again.
You don't want to have to buy it a full set of new modules! ( If you're lucky you might could reflash the PCM after a power cycle, but it may be corrupted/damaged beyond flashing with SDD due to a voltage drop during flashing )

Would it be correct to connect the plugs from another started car to my battery while the PCM is being re-flashed?

 

[Jaguarandi]

'''

Trying to clear (reset) PCM adaptions. + debug file

 

[Jaguarandi]

Basically I'm stumped, what are the options to solve this problem?

 

[Jaguarandi]

This is a clean flashing of the PCM block. Who can change VIN and other values in this file for my car? The file originally has a resolution of .bin, changed to .txt to upload to the forum.

 

[Jaguarandi]

Who knows the clown @Tech_JLR? Texted me in a private conversation. He wants me to pay him $90/hour in advance xD
He knows everything and will 100% solve this problem lol

 

[Jaguarandi]

starting configuring body control module (bcm) as new is solved my problem :|
but I had to pay $50 for it, so I'm surprised I didn't try it myself

hope it helps someone!!! I got off easy, I was about to remove the pcm & bcm & bcmb and send it in for reflashing....