Just got back from some overseas travel, and my order from Sears had arrived: a DriveRight CarChip E/X.

For those who don't know what this is, here are a couple links:

http://www.davisnet.com/drive/produc....asp?pnum=8220

http://www.the-gadgeteer.com/carchip-ex-review.html

I'm pretty excited about what this little guy can provide, for my MCS and other rides. Anyone else logging miles with one of these? If so, which of the four parameters below did you choose? It would be neat to share notes... I'll be hooking mine up tomorrow.

Oh, what's the meaning of the "B" and "S" references with regards to fuel trim and O2 sensor voltage readings? TIA!!!

Vehicle Speed

Engine Speed

Coolant Temperature

Engine Load

Intake Manifold Pressure

Air Flow Rate

Intake Air Temperature

Timing Advance

Fuel Pressure

Fuel System Status

Short Term Fuel Trim (B1)

Short Term Fuel Trim (B2)

Long Term Fuel Trim (B1)

Long Term Fuel Trim (B2)

O2 Sensor Voltage (B1, S1)

O2 Sensor Voltage (B1, S2)

O2 Sensor Voltage (B1, S3)

O2 Sensor Voltage (B1, S4)

O2 Sensor Voltage (B2, S1)

O2 Sensor Voltage (B2, S2)

O2 Sensor Voltage (B2, S3)

O2 Sensor Voltage (B2, S4)

Battery Voltage

 

B1 and B2 refer to the OBD "bank" for the sensor.

The MINI only has one "bank" since it's an inline 4-cylinder.

S1-4 refer to the sensor number. The mini has two O2 sensors.

Also, I think you will find that many of those parameters are unavailable on the MINI.

Here is what I can record using the OBD-II connection on my 2002 MINI Cooper 5-speed:

PIDs supported by MINI Cooper 2002

Service 1 PIDs
PID Sensor Returned value
--- ----------------------- ---------------------------
00 PIDs supported H'BE3EB811
B'10111110001111101011100000010001
1,3,4,5,6,7,B,C,D,E,F,11,13,14,15,1C,20
01 System tests status
03 Fuel system status 0x01 = Open loop
0x02 = Closed loop using O2
0x04 = Open loop driving conditions
0x10 = Open loop system fault
0x20 = Closed loop but system fault
04 Calculated Load Value 0% to 100% 100% = 0xFF
05 Engine Coolant Temp Degree C + 40
06 Short Term Fuel Trim -100% to +99.22% (0% = 0x80)
07 Long Term Fuel Trim -100% to +99.22% (0% = 0x80)
0B Intake Manifold Pressure kPa
0C Engine RPM RPM*4
0D Vehicle Speed KM
0E Ignition Timing Advance 0.5 degree-per-bit 0.0 degree=0x80
0F Air Intake Temperature Degree C + 40
11 Absolute Throttle Position 0%-100% 100%=0xFF
13 Location of O2 sensor
14 O2 Sensor 1 Voltage & Short-term trim -100% to +99.22%
15 O2 Sensor 2 Voltage & Short-term trim -100% to +99.22%
1C OBD standard
20 More PIDs 80000000
21 KM travelled while MIL lit

 

Thank you Trippy for the info. With the one "bank," then it seems that the last 4 O2 Sensor Voltage options are not relevant because they pertain to a second bank. And since the MINI has two O2 sensors, I won't bother with S3 and S4 then. So, with regard to O2 Sensor Voltage, those 8 choices are effectively two for us:

O2 Sensor Voltage (B1, S1)

O2 Sensor Voltage (B1, S2)

What exactly is the significance or relevance of reading voltage at these locations?

Likewise, there are two options for fuel trim also (for us):

Short Term Fuel Trim (B1)

Long Term Fuel Trim (B1)

Is the AIT simply a measurement of ambient as I see at the base of my tach display? Because of it is just simply that, I won't make that one of my 4 chosen criteria. I somehow believe (hope) that this might be the temp at the TB. Gosh, if so, that would be a neat way to compare AIT for intakes, Andy's HAI coming to mind. If however this number is just ambient air though, that is picked-up from a sensor on the front bumper, and not as useful...

Thanks again.