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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » When custom PIDs don't work, where do you start?

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Author Topic: When custom PIDs don't work, where do you start?
nkemp
Member
Posts: 33
Post Re: When custom PIDs don
on: March 24, 2017 (GMT)

Will do.

In the meantime, here are the supposed ScanGauge info:

Hybrid Battery SOC (%)
TXD: 07E7222411
RXF: 046205240611
RXD: 3008
MTH: 006400FF0000
NAM: SOC
nkemp
Member
Posts: 33
Post Re: When custom PIDs don
on: March 24, 2017 (GMT)

Auto didn’t seem to work as well. I got a No Response message and the bottom line was stopped

With the engine running and Torque set to BLANK (not AUTO) I got:

Result for equation: -0.39215687

Command 222411
Response:
7E904622411AF
7E904622411AF
VARIABLES USED IN EQUATION:
a=-1 (HEX=-1,
Binary=11111111111111111111111111111111)
Equation steps: =A*100/255

*/ that should be 32 “1”‘s in the binary string

Given that the calculation showed -0.39 I rescaled the gauge and instead of a dash, it displays -0.4%. I

Obviously that is wrong. I once believed the equation to be correct but may be wrong, and the Variables Used In Equation results are suspicious.
Capp777
Member
Posts: 2993
Post Re: When custom PIDs don
on: March 24, 2017 (GMT)

Have you tried setting the header
to 7E7 without the leading 0 to direct
request to the specific module.

07E9 is a response from a different
module than specified I believe. It
would likely be 07EF04622411?? to
a request to 07E7.

Your responses look normal now.
(4 bytes following with data byte A
equals hex AF (decimal 175).

175*(100/255) = 68.627

You might want to double check your
equation?
nkemp
Member
Posts: 33
Post Re: When custom PIDs don
on: March 24, 2017 (GMT)

The SOC is 70.02% and that looks more reasonable (I don’t have a way to see that the car thinks it is to verify the SOC produced by Torque. THANKS!

But a few more questions … So that I don’t have to ask again

– How did you know to add “7E7 without the leading 0:” ?
and
– How did you know to use 7E7 ?
Capp777
Member
Posts: 2993
Post Re: When custom PIDs don
on: March 24, 2017 (GMT)

Quote from nkemp on March 24, 2017
The SOC is 70.02% and that looks more reasonable (I don’t have a way to see that the car thinks it is to verify the SOC produced by Torque. THANKS!

But a few more questions … So that I don’t have to ask again

– How did you know to add “7E7 without the leading 0:” ?
and
– How did you know to use 7E7 ?

End Quote.

Been a forum member for a long time and seen it before.

Recognized 07E7 in the data you posted as a standard CAN
address.

Now my question… which module is returning the
correct data for you 7E1 or 7E7?

Before you asked CAN Address +8 hex for response.

Also that TEST listing show byte A as -1 (32 1’s) whereas
the response you posted was 175? A=-1 is what I see
when testing while not connected.
nkemp
Member
Posts: 33
Post Re: When custom PIDs don
on: March 24, 2017 (GMT)

Now I see where you got the 7E7. Was not looking at the ScanGauge response.

You said … “Now my question… which module is returning the correct data for you 7E1 or 7E7?”

I can answer that but it more of a guess than a confident answer. I presume 7E7. My hesitation is that I don’t see a 7E1 in anything … is that the default controller address?
Capp777
Member
Posts: 2993
Post Re: When custom PIDs don
on: March 24, 2017 (GMT)

07E9 is typically the response to a 7E1 (+8)
request. (The hex response you provided
where byte A = AF (175 decimal).
nkemp
Member
Posts: 33
Post Re: When custom PIDs don
on: March 26, 2017 (GMT)

I took the Hybrid for a drive and the Torque app cleared up (sorta) an operational question. By watching the amps as I lightly touched the brakes I noticed that it increases the amount of energy reclaimed. In other words, as part of the mechanical braking, the hybrid also increases the charging load (providing parasitic drag on the vehicle). Coasting to a stop may not provide the greatest regen. But neither would hitting the brakes too hard.

If it is related to the brake switch I could parallel the switch and add an increased regen button like the latest Volt.

Now if I could find a PID for tracking the regen rate & I could plot it … Hmmmmm
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