Why would one use a scan gauge on a 2010

Yes. Almost any OBD2 scanner can do this.

 

Here is a list of the generic OBD2 PIDs as reporte by my DashDaq:

Device: a-Generic OBD2 Version:2.1.3-2022
9998 "Latency" "OBD Latency" "ms" 0
9999 "Updates" "OBD Update Rate" "Hz" 0
9996 "NET" "OBD Network Type" "" 0
46 "EVAP_VPA" "Absolute Evap System Vapor Pressure" "kPa" 0
33 "LOAD_ABS" "Absolute Load Value" "%" 0
14 "TP" "Absolute Throttle #1 position" "%" 0
37 "TP_B" "Absolute Throttle Position B" "%" 0
39 "APP_D" "Accelerator Pedal Position D" "%" 0
40 "APP_E" "Accelerator Pedal Position E" "%" 0
13 "MAF" "Air Flow Rate from MAF" "g/s" 0
36 "AAT" "Ambient air temperature" "°C" 0
27 "BARO" "Barometric Pressure" "PSI" 0
1 "LOAD" "Calculated Load Value" "%" 0
28 "CATEMP11" "Catalyst Temperature Bank 1, Sensor 1" "°F" 0
30 "CATEMP12" "Catalyst Temperature Bank 1, Sensor 2" "°F" 0
20 "EGR_PCT" "Commanded EGR" "%" 0
34 "EQ_RAT" "Commanded Equivalence Ratio" "" 0
22 "EVAP_PCT" "Commanded Evaporative Purge" "%" 0
42 "TAC_PCT" "Commanded Throttle Actuator Control" "%" 0
32 "VOLTS" "Control module voltage" "V" 0
17 "MIL_DIST" "Distance Travelled While MIL is Activated" "miles" 0
25 "CLR_DIST" "Distance since DTCs cleared" "miles" 0
2 "ECT" "Engine Coolant Temperature" "°F" 0
9 "RPM" "Engine RPM" "RPM" 0
300 "FUELSYS1" "Fuel System 1 Status" "" 0
301 "FUELSYS2" "Fuel System 2 Status" "" 0
4 "LTFT1" "Fuel Trim Bank 1 - Long Term" "%" 0
3 "STFT1" "Fuel Trim Bank 1 - Short Term" "%" 0
58 "BAT_PWR" "Hybrid Battery Pack Remaining Life" "%" 0
11 "SPARKADV" "Ignition Timing Advance (#1)" "°TDC" 0
12 "IAT" "Intake Air Temperature" "°F" 0
8 "MAP" "Intake Manifold Absolute Pressure" "PSI" 0
200 "MIL" "Malfunction Indicator Lamp (MIL) Status (On/Off)" "" 0
43 "MIL_TIME" "Minutes engine run while MIL activated" "min" 0
24 "WARM_UPS" "Number of warm-ups since DTCs cleared" "" 0
132 "O2B1S1wr" "O2 Bank 1 Sensor 1 Current (wide)" "mA" 0
117 "OSB1S1w" "O2 Bank 1 Sensor 1 Lambda (wide)" "" 0
180 "O2B1S1w" "O2 Bank 1 Sensor 1 Lambda (wide)" "" 0
116 "OSB1S1w_V" "O2 Bank 1 Sensor 1 Voltage (wide)" "V" 0
103 "O2B1S2" "O2 Bank 1 Sensor 2 Fuel Trim" "%" 0
102 "O2B1S2_V" "O2 Bank 1 Sensor 2 Voltage" "V" 0
303 "OBDSUP" "OBD Requirements" "" 0
35 "TP_R" "Relative Throttle Position" "%" 0
16 "RUNTM" "Time Since Engine Start" "sec" 0
44 "CLR_TIME" "Time since DTCs cleared" "min" 0
10 "Speed" "Vehicle Speed" "MPH" 0

 

While not a 2010, I use SGII for my 2007 + 4 kWh Enginer PHEV:

1. To know the highest HV battery temperature as I'm always getting locked out of EV mode due to exceeding 114oF (down here in Miami with 92 degree days and 82 degree nights). This particular gauge is helping me fix the situation.

2. an actual number on SOC is very much necessary for maximizing the use of the PHEV. I've learned that there are certain thresholds I don't want to violate depending on what sort of driving I'm doing and what I want the PHEV to do for me. The bar graph doesn't have enough resolution to do this.

3. To understand whether the PHEV is working properly (is it actually passing any current to the HV, if so is it at max or at a throttled back setting?). I cannot minimize my gasoline usage when the PHEV is doing anything less than max output. So, visibility of HV battery current is a necessity.

Also, I learn when and how much the generators are charging or if and how much battery power I'm using up. This helps me modify my driving technique. Lastly, the current reading helps me understand at exactly what point the Toyota BMS is ready to accept maximum output of PHEV at highway speeds; thereby, moving my mileage up to 75 to 85 mpg at 60 mph.

4. The reported power (Hp) of the ICE is extremely important to maximize PHEV usage. The goal is minimum to zero ICE Hp at all times. I've been able to identify a zone with full PHEV where the Hp floats around 12 horse to keep me moving in cruise control at 60 mph. This results in a 75 to 85 MPG FE. I could not have found this point without SGII.

Everything else on that gauge is a nice bell, but is not important to me at all. I find that HV voltage to be particularly useless and generally doesn't correlate with any mode or plateau of operation that I've seen so far.

Sometimes I use the EV Button indicator to tell me whether it's active or not as the US modification does not provide an annunciator to tell you if it's actually on or off. Unforuntately, the SGII requires up to 30 or 40 button pushes to go from one gage to another and back again. It's not practicle to do this while driving, so I don't generally read the EV button status.

I used to use the gage to read accelerator position, but I've since calibrated my formerly depleted uranium weighted foot to where I know exactly how much opening I'm applying to this position transducer. I don't find it useful any more.

Oh, and once and a while I've had to reset DTCs with it.

Finally, I do like the trip recording functions. I especially like and have come to trust exactly how much gas is left in the tank. This is important when the difference between running out of gas or not is 64 oz and that half gallon can take you up to 40 miles. You tend to push things a bit further when you are getting 750 miles on 10 gallons rather than when you are getting 300 miles on 17 gallons.

 

I use the ScanGauge to show:

RPM: the display's no help here. Since I DWL and try to keep the revs down this is very useful. It's particularly useful as I ease off to get the magic 992.
GPH: the instant mpg jumps about due to mpg varying with speed. Gallons per hour is more consistent since that's based on what the engine's doing. Then I can do a quick mental assessment on whether I should adjust my RPMs.

I grill block, but not too aggressively so I'm not monitoring the temperatures, but I know that I can if needed.

 

Just installed my Scan Gauge 2 rev 3.17. Love it - -Well worth the $150. Set it up to see thru the top of the steering wheel . Got it set up to show RPM, HP from the ICE, Coolant temp and Inverter temp. Helps to keep me in the sweet spot at 20 Hp , helps to see when the ICE is on,in order to use it most efficiently for best MPG. Great addition. Ted

 

In the gen 3 if you run the wire down to the center console then wedge the scangauge on the bottom rear of the center console 'orfice' pointed forward it makes an excellent dash light to light up that dark area at night, use it color cordinated, or contrasting. Unfortunately so far I haven't found any way to hide the cable completely short of drilling a hole.

 

Does the Gen 3 give oil pressure? I have my ScanGauae I used on my Civic Hybrid. I have thought of using it for the '10 Prius, but am not sure what gauges will be available. Water temp and Oil pressure are very desireable for me.

 

I have not seen Oil Pressure on the SGII. Here is a link to a spreadsheet created by a PC member that has many gauges that can be added.
https://spreadsheets.google.com/ccc?key=0AiHL0r_2nhUEdF9lVVBxOVNoN3Zva3E0NmdZTUR1eVE&hl=en#gid=5

 

Who has the best price on the ScanGauge these days?

 

Had I known of this earlier I probably would have tried it. I monitor coolant temp in both systems ( xgauge programmed by
Wayne at CleanMPG), because I block my lower grill and now with subzero F temps 50% of the upper. I also get much more accurate mpg and mph than Toyota MFD.

 

I happened to be behind the wheel of a beater Pontiac Sunfire before XMas, and found myself muttering: "with tach and coolant temp, even this POS has more gauges than our Prius...".

 

Hey Mendel, I see you moved from the "dark side" (HCHII), too!

 

It's still in the family, but yes. Sorry, bad memory: did we talk before?

 

I read in a few post that individuals were having trouble with the SGII in their 2010 Prius. Has the product been updates for the 2010?

 

I think some had not selected 'HYBRID' as the engine/car type is setup..which would cause the SGII to cycle on-off each time the engine stopped. Selecting HYBRID will fix that issue. I love mine, look at it FAR more than the stock stuff, and haven't had any problems.

 

It works just fine, however there are some limitations; for example, battery SoC can't be displayed due to the query format that the SGII is restricted to. Fancier (aka more expensive) devices can read this data.