Parameter Scaling
ALL data/parameters transmitted from the ECU over CAN have units defined by the corresponding parameter calibration table(s). This can be setup and adjusted through the PC tuning software Emtune.
- All Data is unsigned
- All Data is 16 bits
- Low byte of each word (16bit) is transmitted first.
Examples:
Temperature in degrees Celsius or Fahrenheit
Pressure in kPa, PSI, InHg
Speed in Kph, mph, m/s
- Speed in Kph, mph, m/s
| Type | Units | Min Value | Max Value | Conversion Raw to Displayed Value |
|---|---|---|---|---|
| Position | %Posn | -100.0 % | 100.0 % | Display = ECU value x 0.1 - 100 OR ECU value A: 0000 becomes -100.0 % ECU value B: 2000 becomes 100.0 % |
| Pressure | kPa/PSI | 0.0 | 6500.0 | Display = ECU value x 0.1 OR ECU value A: 0 becomes 0.0 kPa/PSI ECU value B: 1000 becomes 100.0 kPa/PSI |
| Temperature | oC / oF | -50.0 | 250.0 | Display = ECU value x 0.1 - 50 OR ECU value A: 0 becomes -50.0 oC/ oF ECU value B: 1500 becomes 100.0 oC / oF |
| Lambda | La | 0.000 | 2.000 | Display = ECU value x 0.001 OR ECU value A 0 becomes 0.000 La ECU value B 1000 becomes 1.000 La |
| Type | Units | Min Value | Max Value | Conversion Raw to Displayed Value |
|---|---|---|---|---|
| Speed | Kph/mph | 0.0 | 6500.0 | Display = ECU value x 0.1 OR ECU value A 0 becomes 0.0 kph ECU value B 1000 becomes 100.0 kph |
| Ignition Angle | oBTDC | -100.0 oBTDC | 100.0 oBTDC | Display = ECU value x 0.1 - 100 OR ECU value A 1000 becomes 0.0 oBTDC ECU value B 2000 becomes 100.0 oBTDC |
| Voltage | V | 0.000 | 20.000 | Display = ECU value x 0.001 OR ECU value A 0 becomes 0.000V ECU value B 20000 becomes 20.000V |
| Percentage1 | % | 0.0 | 100.0 | Display = ECU value x 0.1 OR ECU value A 0 becomes 0.0% ECU value B 1000 becomes 100.0% |
| Percentage2 | % | -100.00 | 100.00 | Display = ECU value x 0.01 - 100 OR ECU value A 0 becomes -100.00% ECU value B 10000 becomes 0.00% ECU value C 20000 becomes +100.00% |
| Type | Units | Min Value | Max Value | Conversion Raw to Displayed Value |
|---|---|---|---|---|
| Rate of Change1 | %/sec | -100.0 | + 100.0 | Display = ECU value x 0.1 - 100 OR ECU value A 0 becomes -100.0 %/sec ECU value B 1000 becomes 0.0 %/sec Or ECU value B 2000 becomes +100.0 %/sec |
| Rate of Change2 | rpm/sec | -20000 | 20000 | Display = ECU value x - 20000 OR ECU value A 0 becomes - 20000 rpm/sec ECU value B 20000 becomes 0 rpm /sec Or ECU value B 40000 becomes + 20000 %/sec |
| G-Force | G | -10.00 G | 10.00 G | Display = ECU value x 0.01 - 10 OR ECU value A 0 becomes -10.00 G ECU value B 1000 becomes 0.00 G or ECU value B 2000 becomes 10.00 G |
| RPM | RPM | 0 | 300000 | Display = ECU value x 1 OR ECU value A 0 becomes 0 RPM ECU value B 20000 becomes 20000 RPM |
| Pressure Diff | kPa/PSI | 0.0 | 6500.0 | Display = ECU value x 0.1 - 1000 OR ECU value A: 10000 becomes 0.0 kPa/PSI ECU value B: 8000 becomes - 200.0 kPa/PSI |
| Counter | 0 | 65535 | Display = ECU value OR ECU value A 0 becomes 0 ECU value B 10 becomes 10 |
| VVT Position | Deg | -100.0 | +100.0 | Display = ECU value x 0.1 - 200 OR ECU value A: 2000 becomes 0.0 Deg ECU value B: 2304 becomes 30.4 Deg (Cam Advanced) ECU value 3: 1871 becomes -12.9. Deg (Cam Retarded) |
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