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Old 07-08-2014, 03:50 AM
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Ecodiesel specific PID's?

Today I got my OBD adapter, loaded Torque and am getting lots of good data.

Has anyone discovered any diesel-specific PID's (or any other for that matter) that could be useful? I'm particularly interested in fuel rail pressure and oil pressure.

There's a thread on the Ram 1500 Diesel forum about PID's and it seems there isn't a whole lot out there yet. It also sounds like they get more information on their EVIC than we do.
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Old 07-30-2014, 03:00 PM
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Re: Ecodiesel specific PID's?

Bump.
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Old 07-30-2014, 03:16 PM
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Re: Ecodiesel specific PID's?

i had the aeroforce scan gauges in my wk. it was able to read the following:

1. INTAKE AIR- Intake Air Temperature taken at the throttle body inlet
2. AMBIENT AIR TEMPERATURE – air temperature at the air filter
3. COOLANT TEMP- Engine Coolant Temperature
4. RPM- engine Revolutions Per Minute
5. CALCULATED AIR FLOW RATE- Mass Air Flow (lbs/min) calculated by the
PCM
6. BAROMETRIC PRESSURE – ambient (outside) air pressure
7. BOOST - Manifold Absolute air Pressure in psi (reads like a boost/vacuum gauge)
8. MAP kPa – Manifold absolute pressure in kPa.
9. THROTTLE POS PCT- Throttle Position percentage (0-100%)
10. THRTL BLDE - Throttle blade position
11. TPS V 1 – Throttle position sensor voltage 1
12. TPS V 2 - Throttle position sensor voltage 2
13. MILES PER HOUR- Miles Per Hour
14. KNOCK RET 1 - Short Term (current) Knock Retard (degrees) using the 2005 Chrysler conversion
15. KNOCK RET 2 - Short Term (current) Knock Retard (degrees) using the 2006 Chrysler conversion
16. LT KNOCK RETARD – Long Term knock retard ignition advance reduction
17. KNOCK SENSOR RAW VOLTAGE 1 – voltage output of knock sensor 1
18. KNOCK SENSOR RAW VOLTAGE 1 Avg. – voltage output of knock sensor 1 averaged over time
19. KNOCK SENSOR RAW VOLTAGE 2 – voltage output of knock sensor 2
20. KNOCK SENSOR RAW VOLTAGE 2 Avg. – voltage output of knock sensor 2 averaged over time
21. WASTEGATE SOLENOID % DUTY CYCLE – programmed wastegate
Duty cycle, 0-100%
22. SHORT TRIM FUEL TRIM- short term fuel trim
23. LONG TRIM FUEL TRIM – long term fuel trim
24. CRNT CELL – Currently fuel trim look-up table cell
25. OXYGEN SENSOR - O2 bank 1 sensor in millivolts
26. FUEL LEVEL % – amount of fuel in the tank in percent.
27. FUEL CAP – Fuel tank capacity in gallons.
28. CAT CON TEMP - Catalytic converter exhaust temp bank 1 and 2 – calculated by the PCM
29. LINE PRS – Transmission line pressure
30. TR OIL TEMP 1- Transmission Temperature (auto transmission only)
31. TR OIL TEMP 2 -
32. TCC SLIP – Torque converter slip
33. CURRENT GEAR 1 – current transmission gear
34. CURRENT GEAR 2 – current transmission gear
35. SHIFT TIME – Time taken to execute last shift
36. LFW/LRW SPEED – non-driven wheel speed (left front or left rear)
37. STEERING ANGLE – Angle in degrees or steering wheel/shaft
38. YAW – output of yaw sensor of ESP system in degrees. Yaw is body roll.
39. BRAKE PSI – Brake boost pressure in psi.
40. LATERAL G – Lateral acceleration as measured by ESP system accelerometer
41. BOOSTER TRV – Brake booster travel
42. BOOSTER VEL – Brake booster actuator veleocity. Measurement of speed at which braking is
applied. The faster the brake is pushed, the higher this value. This parameter along with BRAKE PSI will
give detailed info on how you are applying the brakes.
43. TCC STATE – Indicates the status of the torque converter clutch (unlocked/locked).
44. TCC SLIP – Torque converter slip speed.
45. GEAR ACTUAL – current transmission gear
46. TRANS TEMP – transmission temp
47. TORQUE – calculated torque delivered to the transmssion
48. RUN TIME MINS- engine run time since last engine start. Can be used as a trip timer.
49. BATTERY VOLTAGE- Alternator/battery output voltage
50. BATT TEMP – battery temperature
51. INJ PW- injector pulse width in msec.
52. INJ DC – injector duty cycle
53. FUEL STATUS – Fueling status, open or closed loop
54. CMD A/F – PCM commanded air/fuel ratio
55. BASE SPARK TIMING – timing level commanded by the PCM before adjustments due to
temperature, knock, etc.
57. IGNITION ADVANCE- final ignition timing advance after adjustments
58. ENGINE LOAD-calculated Engine Load (0-100%)
60. MPG - Miles Per Gallon- instantaneous fuel economy
61. HP - Calculated net horsepower
62. MISFIRES- Total misfires of all cylinders.
63. P Ratio – Pressure ratio MAP/BAROMETER
64. TRANS TEMP V6/R08: For V6 vehicles only and the 2007/8 V8 Ram
65. TRANS SLIP V6/R08: Transmission Torque converter slip for V6 and 2007/8 V8 Ram.
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Old 07-31-2014, 10:03 PM
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Re: Ecodiesel specific PID's?

Quote:
Originally Posted by robpp View Post
i had the aeroforce scan gauges in my wk. it was able to read the following:

...
Those look a lot like WK parameters. The WK2[v2.0] is a completely different animal; we have different transmissions and ECU's and a new network architecture.
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Old 10-21-2014, 07:10 AM
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Re: Ecodiesel specific PID's?

Just got a cheap eBay adaptor, loaded up Torque and... BUMP!

PID codes anyone?

Cheers,
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Old 10-21-2014, 01:41 PM
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Re: Ecodiesel specific PID's?

BIG BUMP. Same here.

We need the PID'S for:

pre-turbo EGT
DPF temp
Rail Pressure
Injector Duty Cycle

Do we have an analog sensor or switch for oil pressure?
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Old 10-21-2014, 03:24 PM
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Re: Ecodiesel specific PID's?

what does Bump mean?
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Old 10-21-2014, 07:27 PM
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Re: Ecodiesel specific PID's?

I'm not sure if it's an acronym or just a colloquial term, but it is often a single word posted in a thread to renew interest. Basically, it puts the thread back at the top of the pile.

Bring Up My Post perhaps?

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Old 10-21-2014, 08:25 PM
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Re: Ecodiesel specific PID's?

Quote:
Originally Posted by ExcursionDiesel View Post
BIG BUMP. Same here.

We need the PID'S for:

pre-turbo EGT
DPF temp
Rail Pressure
Injector Duty Cycle

Do we have an analog sensor or switch for oil pressure?
I want to say I read somewhere it's a pressure sensor, not a switch.

I got EGT to work in Torque on PID 78. Use Torque Scan to get it to display. Seems to be pre-turbo based on reaction time and temps. CAT B1S1 seems to be a "close enough" solution to DPF temp. It's downstream and will rise to 1000-1300F when a regen is in progress.

I forsee the Ram guys developing PID's that will cross over to our platform soon. They sure are selling enough of those trucks!
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Old 10-21-2014, 09:28 PM
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Re: Ecodiesel specific PID's?

Quote:
Originally Posted by MBDiesel View Post
I want to say I read somewhere it's a pressure sensor, not a switch.

I got EGT to work in Torque on PID 78. Use Torque Scan to get it to display. Seems to be pre-turbo based on reaction time and temps. CAT B1S1 seems to be a "close enough" solution to DPF temp. It's downstream and will rise to 1000-1300F when a regen is in progress.

I forsee the Ram guys developing PID's that will cross over to our platform soon. They sure are selling enough of those trucks!
I'm lurking on the RAM 1500 Diesel forum...waiting. Its funny watching them discover some of the same stuff we have.

Ok...so you are using the raw PID scan to see PID 78. Now, how do we add it as a Custom PID? Once that is done it can be exported and shared.

Also, I have the Scanguage2 Xgauge codes for DPF. It reads in between EGT and CAT except during regen where it peaks at 1280F while EGT is 950F on flat cruise (during regen).
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Old 03-04-2015, 08:13 AM
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Re: Ecodiesel specific PID's?

Quote:
Originally Posted by MBDiesel View Post
CAT B1S1 seems to be a "close enough" solution to DPF temp.
Sure, I use that too, but I translated the ScanGauge DPF temp xgauge/whatever thing to a Torque custom PID in order to get the real DPF temp value. Transforming these isn't hard, it's just math.

PID: 013C
Long Name: DPF Temperature (Custom PID)
Short Name: DPF Temp
Minimum value: 0
Maximum value: 725
Scale Factor: 1x
Unit Type: C
Equation: ((A*256)+B)/10
Note that you can't use "DPF Temperature" for the long name or Torque will barf due to the name collision. You could use basically anything else for the long name, though... call it "George" if you want.

I have been using this for a few months and the readings I get are consistent with the CAT temp and so forth. Now, if only someone could get a fuel level, engine hours, or transmission temp PID working...
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Old 03-05-2015, 07:50 PM
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Re: Ecodiesel specific PID's?

Quote:
Originally Posted by MBDiesel View Post
Today I got my OBD adapter, loaded Torque and am getting lots of good data.

Has anyone discovered any diesel-specific PID's (or any other for that matter) that could be useful? I'm particularly interested in fuel rail pressure and oil pressure.
Quote:
Originally Posted by Roadkill View Post
Now, if only someone could get a fuel level, engine hours, or transmission temp PID working...
Quote:
Originally Posted by ExcursionDiesel View Post
I'm lurking on the RAM 1500 Diesel forum...waiting. Its funny watching them discover some of the same stuff we have.

Ok...so you are using the raw PID scan to see PID 78. Now, how do we add it as a Custom PID? Once that is done it can be exported and shared.

Also, I have the Scanguage2 Xgauge codes for DPF. It reads in between EGT and CAT except during regen where it peaks at 1280F while EGT is 950F on flat cruise (during regen).

I have been doing some homework and testing using an WK2 MY14 Diesel Export version.

I started mainly because I wanted a bit more info on Exhaust temps and DPF load condition. In Australia we've had quite a few problems with the DPF warning immediately sending the car to limp mode. It appears to be a software problem.

There is a really long thread 900+ posts on the topic in the Export WK2 forum
Is DPF issue for 2014 CRD fixed now?


With an OBD scanner, an app and a bit a lot of internet searching, I've compiled and tested a list of some of the PIDs that are available in the WK2.
Pretty much everything on the car is run by some kind of control unit. Some of these are acessible via the OBD port. I know that the ECU and the TCU are accessible.

There lots of information to find in there, limited by how long you want to spend reverse engineering (painful) and how confident you are with the maths and the possibility of somehow "bricking" the car's brain.

I'm fairly new to this so at the moment I've concentrated on the parameters that are in the SAE standard. All manufacturers have to implement at least some of these standard parameters. Jeep have given us reasonable amount of info in the "Mode 01" set of PID's. I figured these are pretty safe to play around with since it's all read only.
There is more information on these and the Standard is some thing you can find (or buy)..
.
.
.
Once we start searching for Chrysler / Jeep/ Dodge proprietary codes, this is where it gets a bit murky.
The info on these proprietary PIDs (generally "Mode 22") isn't published and Jeep of course change it around from model to model and even within the same model during the manufacturing cycle.
I read that Chrysler usually have a gateway to lock you out of these. There are ways to get around it by "telling" the ECU that you are a diagnostic tool with a certain PID which then allow you to see the Mode 21/22 parameters provided you know what you're looking for.
.
.
.
Anyway back to Mode 01. Attached is the relevant piece of the SAE J1979 standard which gives the list and explanation of all the Mode 01 paramters to that standard.
These include many that are for spark ignition engines only and there are some specific to diesel. There are even some specific to the DPF.

I just went searching through this list to see which of these gave data on my WK2 MY14 diesel export model.
There was a bit of maths involved in working out how to display the data to something inteliglble.
This wiki page was helpful up to a point. OBD-II PIDs - Wikipedia, the free encyclopedia

I have laid it out in a spreadsheet for the ones that are supported by my export diesel version. The NA model is different notably with different emissions gear so you might have a few extra readings to play with.

The ones that my export version do not give any data for are grey-ed out.
The NA version has the SCR system so you might? be able to see something in that parameter.

I was mainly interested in the DPF loading condition. Thankfully the MY14 does actually have a parameter to read which we can convert to a percentage loading. we've been using this to see when and how often the regens are occuring.
(The MY13 model in Australia doesn't give the reading unfortunately).

Some handy readings that can be extracted off this standard list are:
EGR valve position
VGT vane position (commanded position)
CAT temp (DPF temp)
EGT - we only have 1 other EGT sensor - does the NA model have 2 ?
Engine Torque
Engine revs
Speed
Turbo boost
Exhaust pressure (not the differential across the DPF)
Engine run time (trip)
Engine run time (total - since last reset)
number of starts (warm ups)
Coolant temp
Engine Oil Temp
Charge air temp
Ambient air temp
Intake air temp
Inlet air flow
Barometric pressure
Fuel rail temp
Fuel rail pressure (commanded value and actual value)
Fuel flow
Fuel injection timing
Lambda sensor

I would be interested to see what differences are in the NA model
eg if any info on the SCR system or a PM sensor.

The transmission Temp seems to be a popular request in a lot of forums everyone from Ram1500, VW tdi, Toyota, etc etc.

It is buried in the proprietary Mode 22 list of parameters in the TCU but the parameters can be read from the OBD port.
There is a thread on a JK forums which has this data for trans temp but it might not be tranferable to WK or WK2.
Our MY14 WK2 has the trans temp on the EVIC so no need to chase that particular one.


Happy hunting
Attached Files
File Type: pdf 2011 List of Universal parameters.pdf (669.6 KB, 24 views)
File Type: zip JGC WK2 OBD2 PID list - Export model.zip (24.3 KB, 60 views)
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