2 BAR - LS2 - Kpa Correct MAPv-Not

[SBTuner]

Hello all, I am working with a 2006 SSR 6.0l Supercharged. I upgraded the OS from 12612557 to 02612557 I set the MAP sensor scaling as follows:

Used to scale the MAP sensor voltage output into a kPa/psi value.
1bar sensors are typically - 94.429688
2bar sensors are typically - 188.000 <<- this is my setting

See Also:
- {B2102} MAP Sensor Scaler 2

And for B2102...

2nd Offset value applied to the MAP sensor value.
This value would typically be {B2101} "MAP Sensor Scaler" divided by 3.
Eg -
94.429688 / 3 = 31.476563
or
188.000 / 3 = 62.667 <<- again this is my setting.


Problem is that if I look at the MAP voltage with the scantool it reads 4.5v KOEO. If I check the voltage on the sensor it reads 2.5v KOEO.

The Kpa output seems to be ok I was just wondering about the voltage PID.

Anyone have any thoughts on this?

Regards,

Scott

[GMPX]

Scott, the scalers convert the voltage to a real kPa value.
The voltage as you see is not right at KOEO, yet, you are saying the kPa reading is correct?

Cheers,
Ross

[SBTuner]

Hello Ross, the scantool says 4.5v KOEO and 97Kpa, with a voltmeter attached to the MAP sensor it reads 2.45v KOEO. During engine operation and under boost the scantool reports 5.0v but the Kpa reading increase as I would assume they would based upon engine speed.

If I look at a log from about 50% TP to WOT I see the following:

TP 50% 75% 100% 100%
MAPv 4.1 4.6 5.0 5.0
MAP 85 109 135 147
RPM 3706 3780 3750 4202


Thanks for the help.

Regards,

[GMPX]

Scott, I can only assume now there must be yet another scaler for the Vout PID. I'll check it out.

Cheers,
Ross

[SBTuner]

Ok let me know what you find.

[GMPX]

Which PID was it? SAE.MAP or GM.MAP?

Cheers,
Ross

[SBTuner]

Hello Ross, the voltage PID is GM.MAP and the value PID is SAE.MAP

I hope this helps,

Regards,

[GMPX]

Helps to confuse ;)