JEEP HACKING CAN-C / CAN-IHS / UDS ! (Reverse Engineering)

[Drdyer9051]

BCM $A01A - OIL CHANGE STATISTICS

Here's another discovery that I wish I could claim credit for. You can determine how many engine revolutions, how many hours, and how many kilometers it's been since your last oil change. (Or since you've done an "oil change reset" on your dash.)

Ready?

# rid -d bcm A01A # Remember, -d is DECIMAL output
13 152 0 38 2 245

ENGINE REVOLUTIONS SINCE OIL CHANGE:

We take the first two numbers (in big-endian format) and multiply it by 1000. So...​

​

((13*256)+152)*1000 = 3,480,000 engine revs​

HOURS SINCE OIL CHANGE:

We take the next two numbers (in big-endian format) to calculate the number of hours.​

​

(0*256)+38 = 38 hours​

​

KILOMETERS SINCE OIL CHANGE:

We take the final two numbers (in big-endian format) to calculate the number of kilometers.​

​

(2*256)+245 = 757 kilometers (470 miles)​

Enjoy!

And one very special thank-you to our benevolent anonymous patron for sharing this with us!

I was able to use your RID program (python3 rid.py -d bcm A01A) to get
51 5 0 163 26 209
so 13,061,000 revs
163 hours since oil change
6865 Km or 4265 miles since change

thanks,

so when I try to get Cabin Temperature from hvac at D01E

python3 rid.py -d hvac D01E

I get No response received within 2 seconds.

other modules work like tcm 1018 for Crankshaft Actual Torque it
returns 7 240

anyone able to get temperatures from the hvac module?


edit: I am looking into the problem of heater blowing super hot when controls are set to say 73 and it is below 40 degrees outside. I have to put it to low, let it blow cool air and then raise to 73...
this is a known problem and I would like to try to get a work around.


Second Edit: found problem.... hardware problem on can0

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[jmccorm]

edit: I am looking into the problem of heater blowing super hot when controls are set to say 73 and it is below 40 degrees outside. I have to put it to low, let it blow cool air and then raise to 73...

I know that Jeep had a problem with the HVAC that they fixed with a firmware update. The firmware update was already applied to my 2021 June Wrangler, what month is your Wrangler?

 

[Drdyer9051]

I know that Jeep had a problem with the HVAC that they fixed with a firmware update. The firmware update was already applied to my 2021 June Wrangler, what month is your Wrangler?

2022 Diesel Gladiator

 

[jmccorm]

2022 Diesel Gladiator

What month?

 

[Drdyer9051]

What month?

3-22

Gladiator ..... JT Rubicon

 

[Nicor]

Well...I have most of the things on order...
I will help as much as I can.
My goal is to change my steering column/steering sensor and have it elsewhere or completely replaced by something else....we will see how far I go with this.

Everyone here did an amazing job!

 

[NicksRuby]

Well...I have most of the things on order...
I will help as much as I can.
My goal is to change my steering column/steering sensor and have it elsewhere or completely replaced by something else....we will see how far I go with this.

Everyone here did an amazing job!

What will that accomplish?

 

[Nicor]

What will that accomplish?

Let's say my steering setup is non conventional.

"Old Jeep JK", with non conventional steering it was not an issue...
JL, on the other hand it is and it is a problem.


ABS malfunction = check engine light.
SCCM = check engine light.

The only way for me to know in what kind of "trouble" I was getting myself into, was to try.

 

[redracer]

Let's say my steering setup is non conventional.

"Old Jeep JK", with non conventional steering it was not an issue...
JL, on the other hand it is and it is a problem.


ABS malfunction = check engine light.
SCCM = check engine light.

The only way for me to know in what kind of "trouble" I was getting myself into, was to try.

I don't know if this helps... but with a good code scanner (eg. Jscan app or TazerJL) you can completely disable the electric power steering pump from the computers. This is for installing classic hydraulic pumps

 

[Nicor]

I don't know if this helps... but with a good code scanner (eg. Jscan app or TazerJL) you can completely disable the electric power steering pump from the computers. This is for installing classic hydraulic pumps

Yes, thank you.
I do have the Tazer and I have the electric power steering pump disabled.

But I do not have hydro assist, I went a different direction.
My "fight" now is with the steering angle position / check engine lights because of that that...and I do not want to have them.

 

[CaJLMetalHead]

Yes, thank you.
I do have the Tazer and I have the electric power steering pump disabled.

But I do not have hydro assist, I went a different direction.
My "fight" now is with the steering angle position / check engine lights because of that that...and I do not want to have them.

uhmm... careful with that... the Stability Control system uses input from the Steering angle position sensor data

Curious.... what is the issue with the Steering Angle Position sensor?

 

[Nicor]

uhmm... careful with that... the Stability Control system uses input from the Steering angle position sensor data

Curious.... what is the issue with the Steering Angle Position sensor?

Yes, I am aware and for what I am using the Jeep, I do not need it.

I do not have a Steering position sensor, I have remove the gear at 0 degrees (for now) but I will try and install it again and see what happens.

I do not have a steering box/mechanical steering so the "rotation" position of the steering wheel is irrelevant (if it makes sense).

The jeep drives great, zero intervention from the Stability control (but yes, dash is illuminated and it is disabled).

 

[CaJLMetalHead]

Yes, I am aware and for what I am using the Jeep, I do not need it.

I do not have a Steering position sensor, I have remove the gear at 0 degrees (for now) but I will try and install it again and see what happens.

I do not have a steering box/mechanical steering so the "rotation" position of the steering wheel is irrelevant (if it makes sense).

The jeep drives great, zero intervention from the Stability control (but yes, dash is illuminated and it is disabled).

Are you building a Remotely Controlled JL?

 

[Nicor]

Are you building a Remotely Controlled JL?

LOL....that never!
It will always be me in the driver seat, I enjoy it too much!!!

 

[CaJLMetalHead]

LOL....that never!
It will always be me in the driver seat, I enjoy it too much!!!

ohh ok.. well.. you got me curious now... LOL... but hey.. the idea of a full-sized JL RC is cool...

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